German lense specialist Zeiss today introduced the Milvus family of high-resolution SLR camera lenses.
The six-piece set will initially consist of various manual focal lengths: 21mm f/2.8, 35mm f/2, 50mm f/1.4, 85mm f/1.4, 100mm f/2 Macro, and 50mm f/2 Macro.
Additional lengths will be added to the Milvus family over the coming years.
"We want to provide users with the freedom to use the focus position as an artistic tool because it is one of the most important creative possibilities available to photographers," Christophe Casenave, product manager for Zeiss Camera Lenses, said in a statement.
Built specifically for Canon or Nikon DSLR camera bodies with ZE or ZF.2 mounts, the lenses are also compatible via an adapter with mirrorless system cameras, like the Sony α7 series.
With six options, Zeiss's Milvus lenses cover just about any photographer's needs, from portraits and landscapes to architecture and street imagery. With full focus control and a cutting-edge design, the new devices promise "unique results every time," Zeiss said.
"With this diversity of extremely high-quality SLR lenses, we are underscoring that, with our Milvus lenses, we can supply the right focal length for almost any application or personal preference," Casenave added.
An all-metal barrel guarantees protection against dust and water spray, though you probably shouldn't use them to capture a deep-sea-diving adventure. Each lens, however, does support all DSLR operating modes—aperture priority, shutter priority, program modes, manual time, exposure settings.
They also enable high-quality film recording in up to 6K, and the "de-click" function in the ZF.2 mount lenses allows filmmakers to freely adjust the aperture as conditions change.
Pre-orders are now open for the Zeiss Milvus lenses, ranging from US$1,177 to US$1,843. Global delivery will begin in October.


Mobius Photonics Laser Source Used in Super-Resolution Microscopy Experiments at Max Planck Institute
MOUNTAIN VIEW, Calif., Oct. 27, 2011 – Mobius Photonics, an innovative producer of short pulsed fiber laser sources (IR, green, and UV laser), announces that its “G1R2” laser source has been used in super-resolution microscopy experiments at the Max Planck Institute for Biophysical Chemistry (Göttingen, Germany). The experiments demonstrated that a laser-based fluorescence microscopy technique called stimulated emission depletion (STED) microscopy could be used to image intact, living, multicellular organisms.
Over the past few years, much research has focused on developing STED set-ups based on novel laser sources that could enhance the technique’s capabilities-particularly the ability to generate ultra-high-resolution images of biological samples quickly and to use fluorescent protein variants of choice. The recent experiments at the Max Planck Institute successfully demonstrated multiple laser sources for imaging multicellular, living samples expressing green fluorescent protein (GFP).
The Mobius source was a customized G1R2 laser that was used to produce a comb spectrum of user-selectable visible wavelengths with approximately one nanosecond pulse duration and a 20 MHz repetition rate. The wavelength selectivity allowed researchers to tailor the output for GFP, but could also accommodate markers requiring other wavelengths.
“We’re excited that our G1-series laser has once again been used to help advance super-resolution microscopy,” said Mobius Vice President of Technology Manuel Leonardo. “Our G1R2 laser allowed researchers to test and select optimum wavelengths for imaging samples expressing GFP. It also allowed quick image acquisition and produced the smallest pixel size of the lasers tested.”
Added Leonardo, “Building on our experience in super-resolution microscopy, Mobius has recently developed a new prototype laser that offers similar capabilities to our G1R2, but from an easier-to-use, longer life system. Called ‘Rainbow,’ the current prototype generates five discrete wavelengths. Our aim is that future Rainbow systems could produce up to seven wavelengths between 557 and 651 nm.”
Mobius’ Rainbow prototype produces output at 557 nm, 571 nm, 585 nm, 600 nm and 616 nm. The output is switchable between the individual wavelengths, so can be tailored for particular fluorescent markers. Rainbow features approximately 1-ns pulses at repetition rates of up to 20 MHz and pulse energies ranging from 25 to over 50 nJ per pulse, depending on the wavelength. The result is a laser system designed to allow high-resolution image generation with fast acquisition times.
Max Planck Institute researchers conducted the STED experiments with collaboration from colleagues at the Georg-August-Universität Göttingen (Göttingen, Germany) and the Yale University School of Medicine (New Haven, Connecticut). More details on the experiments can be found in the following article and its supporting materials. “Nanoscopy in a Living Multicellular Organism Expressing GFP” by Brian R. Rankin, Gael Moneron, Christian A. Wurm, Jessica C. Nelson, Arne Walter, Dirk Schwarzer, Jörg Schroeder, Daniel A. Colón-Ramos, Stefan W. Hell, Biophysical Journal, 22 June 2011 (Vol. 100, Issue 12, pp. L63-L65)
About Mobius Photonics
Founded in 2005, Mobius Photonics, Inc. produces fiber-based laser sources for applications ranging from material processing for solar cell manufacturing, semiconductor fabrication and assembly, and flat panel display manufacturing, to scientific uses such as super-resolution microscopy. The Mobius Photonics team combines in-depth understanding of customer needs with manufacturing experience, and pushes the state-of-the-art by working in close collaboration with suppliers and customers around the world.
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Channels: Cornea | Posted 6/14/2018
Majid Moshirfar, MD, et al., present a case of Raindrop® corneal inlay (ReVision Optics) explantation in a female patient who was 1-year postoperative with 20/100 uncorrected distance visual acuity (UDVA) and J3 uncorrected near visual acuity (UNVA). The patient was unsatisfied with her vision and elected removal of the inlay. While lifting the flap, the inlay adhered to the Seibel IntraLase Flap Lifter (Rhein Medical). Removal of the inlay in its entirety was achieved.
Corneal Inlay • Raindrop Near Vision Inlay • ReVision Optics • Rhein Medical • Seibel IntraLase Flap Lifter


Introducing our cutting-edge Universal Zoom Lens, the perfect companion for your smartphone photography adventures. With its enhanced zooming capability, this lens opens up a world of possibilities, allowing you to capture distant views with astonishing clarity and detail, all at an impressive 8x magnification
The heart of this lens lies in its innovative optics design, featuring a novel optical path that sets it apart from the rest. Experience wider angles, improved light transmission, higher resolution, and more accurate colors, elevating your phone's imaging quality to a professional level
Not just a powerhouse in functionality, our lens also boasts a stylish and protective housing. The sleek black casing not only adds a touch of sophistication to your phone but also serves as a robust shield, guarding your device against scratches, dust, and minor impacts
We understand the value of practicality and affordability, which is why our Universal Zoom Lens is designed to be a cost-effective alternative to traditional cameras. While it may not match the performance of high-end dedicated cameras, it offers a portable and affordable solution for casual photography and videography without compromising on impressive results.
Experience the next level of smartphone photography with our Universal Zoom Lens. It's time to transcend the ordinary and elevate your visuals to extraordinary heights. Unleash your creativity, capture moments with unmatched clarity, and relish in the joy of seeing the world through a lens that redefines what's possible


HEINE Direct ophthalmoscope BETA 200s——Aspheric optical system
1. The aspherical optical illumination technology is used to optimize the Gullstrand principle to achieve good illumination (separation of illumination and observation). Greatly reduces the reflection of the cornea and red magic. That is, a clear fundus image can be observed under the small pupil.
2. XHL Xenon halogen lighting technology. High brightness, white light.
3. Concave, multi-layer film observation window. Effectively avoid light reflections.
4. Dustproof housing. Easy to save and maintenance free.
5. The optical system is located above the metal base. High precision and durability.
6. Ergonomic design. Perfect for the examiner's eyelids, the soft eyelid protector guarantees comfort.
7. 7 spot + separate red-free filters for pupils of different sizes.
8. Integrated fissure spot, fixation star, cobalt blue filter and no red filter to improve the contrast of observation.
9. Diopter range: -36D ~ +38D, a total of 74D
Gaush Medical Wechat Public Account


41 AED tax incl.
JJC LH-63 Lens Hood for Canon EF-S 55-250mm f4-5.6 IS STM
Replaces canon ET-63 Hood
Warning: Last items in stock!
Lens hoods are primarily designed to avoid unwanted stray light from entering the lens by extending and shading the end of the lens. In addition, since the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact.
IN STOCK , SHIP THE SAME DAY


Now showing items 1-2 of 2
PIN versus Avalanche photodiode gain optimization in zero cross correlation optical code division multiple access system
(Elsevier GmbH, 2013-02)
In this paper, we show details of zero cross correlation (ZCC) code development and investigate performance by measuring bit-error-rates compared to other optical code division multiple access (OCDMA) codes using Avalanche ...
Performance evaluation of Fi-Wi network based on SCM-optical code division multiple access architecture
(Elsevier GmbH, 2013-10)
This paper investigates the performance of a spectral amplitude coding (SAC)-OCDMA system design utilizing subcarrier multiplexing techniques for use in the popular fiber-wireless (Fi-Wi) technology. Zero cross correlation ...


Roadrunner: Scanning the Road Ahead
Roadrunner by Corephotonics is a next-generation sensing solution that combines a stationary wide FoV camera with a narrow FoV scanning camera to deliver both wide FoV and long detection range of up to 300 meters. Roadrunner’s innovation significantly extends the detection and classification distance of visual data, offers highest angular resolution at a wider FoV, lowers cost, features a small physical footprint, and importantly, provides a passenger sense of safety.
Built on Corephotonics’ extensive experience with multi-aperture camera systems and complementary algorithms, Roadrunner’s dual camera capabilities effectively utilize deep learning algorithms to determine the ROI of the scanning camera at any given moment. These advances address a common pain-point in the industry; with Roadrunner, autonomous vehicles can classify pedestrians, vehicles, traffic lights and signs – even on a curvy road – and better detect small debris as far as 200m away.


How To Use Binoculars With Glasses? [Explained]
It’s hard to find binoculars that work well with glasses, but they’re essential for outdoor enthusiasts, bird watchers, hunters, and sports fans. For those who wear glasses, it’s hard to use binoculars. It’s important to find binoculars that work well with glasses if you want to have a clear and comfortable view. We’ll give you tips on how to pick the right binoculars for glasses wearers and how to use them effectively in this guide.
We’ll start by explaining why glasses wearers need to pick binoculars carefully. We’ll go over different types of binoculars and what to look for when choosing one. In addition, the guide will tell you how to adjust the diopter and eyecups on binoculars with glasses. Finally, the article will provide some troubleshooting advice for common issues that glasses wearers may encounter when using binoculars. This way, glasses wearers can choose and use binoculars that are comfortable and clear.
Using Binoculars with Glasses: Best Practices
It takes some practice and patience to use binoculars with glasses, but with the right techniques and best practices, glasses-wearers can enjoy a comfortable and clear viewing experience.
To avoid strain and discomfort while birdwatching with binoculars and glasses, keep your posture straight and your eyes aligned. Use both hands to hold the binoculars steady and keep your elbows close to your body. Look through your binoculars with both eyes open, using your peripheral vision to track birds as they fly. Align your eyes with the eyepieces, so that the center of the view is aligned with your pupils. If you’re tracking a fast-moving bird, keep your head steady while moving the binoculars to follow its path.
Using binoculars with glasses for stargazing can be rewarding, but it takes a dark sky and a steady hand. Choose a clear night with minimal light pollution and find a comfortable position to lie down or sit. Hold the binoculars steady with both hands and align your eyes with the eyepieces. Take breaks every few minutes and let your eyes adjust to the darkness so you don’t get tired. Watch for bright stars, star clusters, and nebulae, and focus on their details.
You need to keep your eyes aligned and focused when you’re hunting with binoculars with glasses. Keep your elbows close to your body and hold your binoculars steady. Look for motion and scan the area carefully, focusing on areas that interest you. Align your eyes with the eyepieces, so that the center of the view is aligned with your pupils. Take breaks every few minutes and rest your eyes to prevent eye strain.
Maintaining proper posture and eye alignment
The right posture and eye alignment are crucial when using binoculars with glasses to avoid strain and discomfort. Keep your back straight and your shoulders relaxed while using binoculars. Align your eyes with the eyepieces, so that the center of the view is in line with your pupils. Hold the binoculars steady with both hands and keep your elbows close to your body. Adjust the focus knob and diopter until both eyepieces focus. Take a break if you’re experiencing discomfort or eye strain.
Focusing and tracking moving objects
In order to focus on and track moving objects with binoculars with glasses, you need to keep your head and eyes steady. When tracking a fast-moving object, keep your head steady while moving the binoculars to keep up with it. Track the object with your peripheral vision and adjust the focus knob and diopter as needed.
In conclusion, using binoculars with glasses requires proper technique, best practices, and patience. You can make your viewing experience comfortable and clear by maintaining proper posture and eye alignment, focusing and tracking moving objects, and taking breaks to rest your eyes. Binoculars can be used by glasses wearers with the right technique and practice.
Adjusting Binoculars for Glasses Wearers
Here’s a step-by-step guide to adjusting binoculars for glasses wearers so you can enjoy a comfortable and clear viewing experience.
Adjust the eyecups: It’s important to adjust the eyecups so that they sit snugly against the glasses. Make sure the eyecups aren’t too high or too low and that they fit comfortably.
Adjust the focus knob: To avoid double vision, adjust the focus knob while looking through both eyepieces.
Adjust the diopter: The diopter is a small knob usually located on the right eyepiece that lets you fine-tune the focus for each eye separately. Close your right eye and use the focus knob to adjust the left eyepiece until the image is sharp. Then close your left eye and adjust the diopter to focus on the right eyepiece. Open both eyes and adjust the focus knob if you need to.
Here are some tips to help you find the right balance between binoculars and glasses:
- Minimize the gap between the glasses and the eyepieces to get a better field of view and better image quality.
- Adjust your glasses so you’re looking through the correct part of the lens if you wear bifocals or progressive lenses. It’ll help reduce distortion.
- Find the most comfortable and effective eyecup position for your glasses by experimenting.
- Consider using a binocular tripod mount if you still can’t get the right balance. It’ll stabilize the binoculars and reduce shaking, making it easier to see clearly.
Blurry or double vision are common problems glasses wearers encounter when using binoculars. Here’s how to fix them:
- Make sure both eyepieces are in focus by adjusting the focus knob and diopter.
- Ensure you don’t have any smudges or scratches on your glasses.
- Make sure the eyecups are set to the right distance for eye relief.
- Reduce shaking by holding the binoculars steady or using a tripod.
With these tips and troubleshooting, glasses wearers can enjoy a comfortable and clear viewing experience with their binoculars.
Understanding Binoculars and Glasses
It’s important to understand how binoculars work and how glasses affect their use before diving into tips for using them with glasses.
The most important parts of a binocular are the lenses, prisms, focus knob, eyepiece, and diopter adjustment. Binoculars are composed of two identical telescopes mounted side by side to magnify distant objects.
You can use binoculars in several ways with glasses. The biggest impact is on the distance between your eyes and the eyepiece. Seeing through glasses reduces the field of view and the depth of field of the eye. Also, the shape of the glasses frames can affect the angle of your view.
Choosing binoculars for glasses wearers depends on a lot of things. The first thing to consider is the eye relief, which is how far apart the eyepiece is from your eye. In order to avoid a reduced field of view and poor quality, glasses wearers should look for binoculars that have long eye relief, usually between 14mm and 20mm. Also, glasses wearers should look for binoculars with adjustable eyecups, so they can get the right eye relief distance by twisting them up and down.
It’s also important to consider magnification power and objective lens size. If you wear glasses, a lower magnification power and a larger objective lens size can give you a better field of view. 8x or 10x magnification and 42mm or bigger objective lenses are usually good.
When it comes to choosing binoculars for glasses wearers, it’s crucial to understand how they work and how glasses affect them. Glasses wearers can choose binoculars that provide a clear and comfortable viewing experience based on factors like eye relief, adjustable eyecups, magnification power, and objective lens size.
Can I use any type of binoculars with glasses?
You need binoculars with long eye relief, which is the distance between the eyepiece and your eye when you’re seeing the whole field of view. Not all binoculars work with glasses. It’s usually best for glasses wearers to get binoculars with an eye relief of 15mm or more.
How do I know if my binoculars are compatible with my glasses?
Make sure your binoculars have an eye relief of 15mm or more so that you can see the whole field of view without taking your glasses off.
What should I do if I experience double vision when using binoculars with glasses?
You may need to adjust the eye relief or try a different pair of binoculars if you experience double vision while using binoculars with glasses.
Can I wear contact lenses instead of glasses when using binoculars?
You can wear contact lenses instead of glasses with binoculars. Contact lenses eliminate the need for eye relief and allow you to see everything clearly.
Is it necessary to use binoculars specifically designed for glasses wearers?
It’s not necessary to use binoculars specifically designed for glasses wearers, but it’s recommended. Binoculars with long eye relief are more comfortable for glasses wearers and provide a wider field of view. Besides eliminating eye strain and discomfort, they also don’t need to adjust the focus knob and diopter too often.
In summary, using binoculars with glasses can be a challenging task, but you can make it fun and rewarding with the right tips and techniques. When you’re using binoculars with glasses, it’s important to keep your posture and eyes aligned properly so that you’re comfortable and effective.
When using binoculars with glasses, birdwatchers, stargazers, and hunters have to use different techniques to focus and track moving objects. Additionally, wearing contact lenses can eliminate the need for eye relief.
For glasses wearers using binoculars, we recommend practicing and experimenting with different techniques until you find the right one. You can help other glasses wearers enhance their binocular experience by sharing this article with them.
Also, check- What Does 30×60 Binoculars mean?
Can You Bring Binoculars To A Concert?
Can You Bring Binoculars On A Plane?


We examine the three-dimensional intensity distribution of vector Bessel–Gauss beams with general polarization near the focus of a nonaperturing thin lens. Recently reported linearly and azimuthally polarized Bessel–Gauss beams are members of this family. We define the width and focal plane of such a vector beam using an encircled-energy criterion and calculate numerically that, as for scalar beams, the true focus occurs not at the geometric focus of the lens but rather somewhat closer to the lens. This focal shift depends on the mode number and system parameters and is largest for a narrow beam, long lens focal length, and large wavelength.
© 1999 Optical Society of AmericaFull Article | PDF Article
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We demonstrate off-axis spectral beam combining applied to a 980 nm high power broad area diode laser bar. The experiments yielded 9 W of optical power at 30 A of operating current and the measured M 2 values of the combined beam from 12 emitters were 1.9 and 6.4 for the fast and the slow axis, respectively. The slow axis beam quality was 5-6 times better than the value obtained from a single emitter in free running mode. A high brightness of 79 MW/cm2-str was achieved using this configuration. To our knowledge, this is the highest brightness level ever achieved from a broad area diode laser bar.
©2009 Optical Society of America
High power broad area diode laser bars are interesting devices for a range of specific industrial applications such as, e.g., cutting/marking of certain artificial materials  or cladding pumping of fibre amplifiers . The main advantages of these devices are that they are compact with sizes of the order of a few cubic millimetres; they can deliver relatively high output power levels above 100 W, and they have long life times up to 10,000s of hours. Furthermore, they have high wall-plug efficiencies up to 75% . Hence they are promising candidates for applications that require a compact laser system that can deliver high output power levels. However, the main draw backs of these devices include poor beam quality and low spatial brightness that is a result of the high divergence along the slow axis caused by the broad emitter area.
Several research groups have used different approaches for improving the beam quality and spatial brightness of high power diode laser bar systems. One such approach applied on a broad area laser array is using an external cavity providing off-axis feedback to all the emitters in the array . Another external coupling technique applied on a laser array is utilizing the Talbot cavity . Spectral beam combining is another well-known technique which is used for improving the spatial brightness and beam quality of broad area diode laser bars and arrays . Slab Coupled Optical Waveguide Lasers (SCOWL) provides very high output power levels with excellent beam quality . Spectral beam combining of a SCOWL array  can provide high output power in a near diffraction limited beam. Recently, Gopinath et al.,  combined a 25-element broad area diode laser bar using spectral beam combining. In general, the beam quality and brightness that can be achieved in the combined output from an array using this technique is limited by the spatial beam quality of the single emitters in the device. This particularly becomes an issue when using broad area laser bars, where the single emitter beam quality is far from diffraction limited.
Off-axis spectral beam combining is a recently developed technique, which has been used to improve the beam quality and spatial brightness of a segmented broad area laser diode. In 2006, Jensen et al.,  applied off-axis spectral beam combining to a segmented broad area laser diode and achieved a beam quality improvement of a factor of 3.4 compared to a single free running segment. In 2006, Jechow et al.,  used an external cavity in an off-axis arrangement for spectral beam combining of a broad area laser bar and achieved a beam with M 2 slow < 14 and M 2 fast < 3 at an optical power in excess of 10 W.
In this paper, we report on off-axis spectral beam combining applied to a 980 nm high power diode laser bar. We applied off-axis feedback to 12 broad area emitters, which resulted in a 5-6 fold improvement in the beam quality along the slow axis of the output beam compared to a free running single emitter on the same laser bar. The spatial brightness of the output beam was compared with that of a free running standard laser bar. A 34 fold improvement was observed resulting in a brightness of 79 MW/cm2-str which to our knowledge is the highest obtained brightness for a broad area diode laser bar.
2. Off-axis spectral beam combining experimental setup
The 980 nm broad area laser bar used in the experiment consisted of 19 emitters, each 150 μm wide and with a pitch spacing of 500 μm. The epitaxial layers were grown by molecular beam epitaxy (MBE). The active region consists of a single InGaAs-quantum well embedded in a 1.06 μm thick AlGaAs core region with 20% Aluminum content. The optical waveguide was formed by 1 μm thick AlGaAs claddings with 40% Aluminium. After processing, the wafers were thinned and chipped into laser bars with a pitch of 500 μm. The laser was coated with two pairs of a high-reflection Si/SiO2 coating on the back facet with a reflectivity > 97% and a single layer anti-reflection (AR) SiN coating on the front facet with a residual reflectivity < 0.01%.
The M2 values of the individual emitters were measured to be approximately 30 - 35 along the slow axis and the beam along the fast axis was found to be nearly diffraction limited. The output light has been collimated along the fast axis by directly fixing a 910 μm focal length LIMO cylindrical micro lens to the laser heat sink. After fixing the micro lens only 12 of the 19 emitters were fully functional and, therefore, the subsequently reported results deal only with these emitters. In the absence of an external cavity, the laser produced 3 W of cw power at 30 A. Such a low output power is due to the efficient front facet antireflection coating. A similar laser bar with a standard anti-reflection coating, which has a residual reflectivity of approximately 5%, was used for comparison and it gave an optical output power of 22 W at 30 A of operating current.
Figure 1 shows a schematic of the experimental setup for off-axis spectral beam combining of the laser bar. The components in the external cavity setup were; the AR-coated laser bar, the fast axis collimation lens, the slow axis collimation lens with a focal length of 100 mm, a reflection grating with 1200 lines/mm with a first order diffraction efficiency measured to be around 95% at 980 nm, a D shaped sharp edged highly reflective mirror, a spatial filter, and a 10% reflective plane output coupler. The output beam from the external cavity was split into two using a plane glass plate (10% reflectivity) as a beam splitter. The low power part of the beam was focused on to a beam analyzer, using a 100 mm focal length achromatic lens, for measuring the beam quality. The high power part of the beam was focused on to a power meter, using a 100 mm biconvex lens. All lenses were antireflection coated.
The slow axis collimator (SAC), the grating and the output coupler were placed in a configuration similar to the standard spectral beam combining technique. The diffraction grating was placed in the slow axis Fourier plane formed by the 100 mm focal length cylindrical lens. The angle of incidence of the beam onto the grating was approximately 52 degrees. The first order diffracted beam was made to travel back in parallel into the emitters using a plane output coupler of 10% reflectivity placed 135 mm away from the grating. As the light from each emitter was incident on the grating at a different angle, each emitter was forced by the external cavity to operate at a particular wavelength.
In addition to spectral beam combing, we applied off-axis feedback in our experiment using a similar method as described in ref. 10. Each broad area emitter exhibits the typical bilobed far field profile. By using a D shaped sharp edged highly reflective off-axis mirror in the first order diffracted beam, a few spatial modes in one of the two far field lobes were fed back to the emitters. In this way we were able to selectively amplify higher order spatial modes and suppress lower order spatial modes [12, 13]. This yielded a narrow output beam with improved beam quality.
In principle, using standard spectral beam combining, the beam quality of the combined output of a laser bar can at most be as good as that of a single emitter. By using off-axis spectral beam combining, the beam quality of the combined beam can be improved even further, i.e., to a quality exceeding the beam quality of a single emitter.
3. Off- axis spectral beam combining results and discussion
The output from the external cavity laser was analyzed regarding power characteristics, spectral behaviour and beam quality. Figure 2 shows the light-current characteristics of the laser bar with off axis spectral beam combining and in free running mode. With off- axis spectral beam combining, the output power was measured to be 9 W at 30 A of input current. The laser threshold was measured to 6 A, and the characteristics show a slope efficiency of 0.38 W/A.
Figure 3 shows the optical spectrum of the output beam recorded at an operating current of 30 A with off axis spectral beam combining. 12 equally spaced main peaks over a spectral range of 30 nm are observed in the spectrum corresponding to that of 12 emitters combined. A few additional peaks were observed in the spectrum which may be due to a slight imperfection in the superimposition of the beams on the grating. A wavelength spacing of approximately 2.67 nm is observed between the main peaks. The wavelength spread ∆λ, is related to the focal length, f, of the transform lens, the spatial extend, d, of the laser, and the grating dispersion, dα/dλ by
where the grating dispersion is given by
Here, α is the grating period and α 0 is the angle of incidence relative to the grating normal for the centre emitter on the bar. The calculated wavelength separation for our experimental configuration was 2.56 nm, which is in good agreement with the experimentally obtained value of 2.67 nm. The output wavelengths were found to be in the range from 950 nm to 980 nm with a centre wavelength of approximately 965 nm.
The output beam was focused using an achromatic lens of 100 mm focal length and beam profiles along the beam caustic was recorded using a Nanoscan beam profiler (Photon Inc.). The 1/e2 values of the beam width were measured throughout the experiment. Figures 4(a) and 4(b) shows the caustic of the output beam along the fast and the slow axis respectively. A slight astigmatism is present in the laser output as noted from Fig. 4.
The M2 values of the output beam at 30 A of operating current were found to be 1.9 and 6.4 along the fast and slow axis, respectively. The M2 curve fitting shown in the figures is based on the well known formula for the propagation of a Gaussian beam,
where W(z) is the spot size at a distance z from the beam waist, W 0 is the spot size at the beam waist and λ is the wavelength.
The slow axis M2 value of 6.4 obtained from the off-axis spectrally beam combined laser is to be compared with the slow axis M2 value of approximately 30-35 which is measured for a single emitter on the free running laser bar. An improvement of a factor of 5-6 in the slow axis beam quality of the combined beam is achieved with off-axis spectral beam combining when compared with the single emitter free running laser beam. The slow axis M2 value of the whole bar in free running mode was found to be approximately 1580.
The beam profile along the fast and the slow axis at the beam waist are shown in Figs. 5(a) and 5(b), respectively. The beam could be focused to a spot of 60 μm by 69 μm diameter along the fast and the slow axis, respectively, by simple focusing of the beam with the f = 100 mm achromatic lens.
We calculated the brightness of the output beam. The brightness, B is defined as ,
where Pav is the average power, M2x is the beam quality parameter along the slow axis and M2y is the beam quality parameter along the fast axis. The calculated brightness was 79 MW/cm2-str. To our knowledge, this is the highest brightness ever achieved from a broad area diode laser bar. We have measured the output power and the beam divergence of a standard anti-reflection coated laser bar with 19 emitters, same emitter width and same pitch spacing for comparison. In free running mode, the output power was 22 W and the beam divergence of the laser bar was approximately 7 degrees giving a calculated brightness of around 2.3 MW/cm2-str.
We have demonstrated a 980 nm external cavity broad area diode laser bar system based on off-axis spectral beam combining. An output optical power of 9 W was achieved at an operating current of 30 A with an M2 value of 1.9 and 6.4 along the fast and the slow axis, respectively. We have obtained a high brightness of 79 MW/cm2-str from the broad area laser bar system.
The authors wish to acknowledge financial support from the Proof of Concept Fund under the Danish Agency for Science, Technology and Innovation, BIOP graduate school (grant no. 646-05-0064/20245) and from the European Community through the project WWW.BRIGHTER.EU (contract IST-2005-035266). Furthermore, the authors wish to acknowledge Fraunhofer Institute for Applied Solid State Physics, Germany for supplying the laser and Thomas Westphalen, Fraunhofer Institute for Laser Technology, Germany for mounting the FAC lens.
References and Links
1. L. Li, “The advances and characteristics of high-power diode laser materials processing,” Opt. Laser. Eng. 34, 231–253 (2000). [CrossRef]
2. H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, “High power neodymium-doped single transverse mode fibre laser,” Electron. Lett. 29, 1500–1501 (1993). [CrossRef]
3. M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, “73% CW power conversion efficiency at 50W from 970nm diode laser bars,” Electron. Lett. 41, 245–247 (2005). [CrossRef]
4. Y. Zheng, X. Gao, H. Miyajima, and H. Kan, “Divergence-narrowed external-cavity broad-area laser-diode array,” J. Appl. Phys. 95, 6489–6491 (2004). [CrossRef]
5. R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode array in an external Talbot cavity,” Appl. Phys. Lett. 58, 2586–2588 (1991). [CrossRef]
6. V. Daneu, A. Sanchez, T. Y. Fan, H. K. Choi, G. W. Turner, and C. C. Cook, “Spectral beam combining of a broad-stripe diode laser array in an external cavity,” Opt. Lett. 25, 405–407 (2000). [CrossRef]
7. J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, “Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode,” IEEE Photon. Technol. Lett. 14, 756–758 (2002). [CrossRef]
8. R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, “High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays,” IEEE Photon. Technol. Lett. 19, 209–211 (2007). [CrossRef]
10. O. B. Jensen, B. Thestrup, P. E. Andersen, and P. M. Petersen, “Near-diffraction-limited segmented broad area diode laser based on off-axis spectral beam combining,” Appl. Phys. B 83, 225–228 (2006). [CrossRef]
12. S. Wolff, A. Rodionov, V. E. Sherstobitov, and H. Fouckhardt, “Fourier-Optical Transverse Mode Selection in External-Cavity Broad-Area Lasers: Experimental and Numerical Results,” IEEE J. Quantum Electron. 39, 448–458 (2003). [CrossRef]
13. B. Thestrup, M. Chi, and P. M. Petersen, “ Lateral mode selection in a broad-area laser diode by self-injection locking with a mirror stripe,” Proc. SPIE 5336, 38 (2004). [CrossRef]
14. R. Diehl (Ed.), High-Power Diode Lasers: Fundamentals, Technology, Applications (Springer-Verlag, Berlin Heidelberg, 2000). [CrossRef]


PHAROS Femtosecond Laser: 15 Years of Precision
Light Conversion first delivered PHAROS in 2006 — a compact, customizable diode-pumped solid-state (DPSS) femtosecond laser. Fifteen years later, Light Conversion can now take a moment to remember and celebrate the origin and evolution of PHAROS.
PHAROS laser evolved from Twinkle sub-picosecond laser manufactured by Light Conversion between 1993 and 2000. Only 10 Twinkle lasers were produced. The year 2000 saw the birth of a project for a Yb-based DPSS femtosecond laser, and the first generation of PHAROS laser was launched at Laser World of Photonics 2005 and Photonics West 2006.
The first PHAROS units were delivered for scientific endeavors, but shortly thereafter PHAROS lasers were tested in industrial environments. In 2008, PHAROS laser attracted particular interest in Japan and revealed its potential in an industrial application by proving reliable for 24/7/365 operation. Other scientific and industrial applications soon followed.
As markets emerged with corresponding customer demands, production and engineering has been ramped up to meet these demands from 2006 to the present. Along the way, there were numerous goals to accomplish. Achieving a repetition rate of 1000 kHz, supplying PHAROS lasers to leading industrial machinery manufacturers, synchronizing the laser with synchrotrons, optimizing Carrier Envelope Phase (CEP) stabilization, and implementing BiBurst MHz/GHz functionality were among the top highlights.
PHAROS Continues to Evolve
The last 15 years have seen significant advances: the first PHAROS delivered 100 kHz pulse repetition rate, 4 W of output power, and up to 0.2 mJ pulse energy. Notably, the current output parameters have increased substantially to 1000 kHz, 20 W, and 2 mJ with additional improvements coming soon in new releases.
PHAROS lasers are currently used for drilling and cutting various metals, ceramics, sapphire, glass, and material ablation; for mass spectrometry; and with a variety of other applications. All these applications enable cutting-edge products and research. With major industrial customers operating in the display, automotive, LED, medical device manufacturing, and other industries, the reliability of PHAROS has been proven by hundreds of systems in 24/7 production environments.
Light Conversion customers are exploring new ways for PHAROS to make existing manufacturing processes more efficient, to push the limits of precision manufacturing, and to expand human knowledge through groundbreaking scientific discoveries.
To request more information or a quotation for Light Conversion products, contact IL Photonics.


Light is ubiquitous in daily life, from the performance of color temperature, the energy emitted, the illuminance generated, the color rendering, the luminous efficiency and intensity, the brightness reflected into the eyes, the glare phenomenon to the light distribution curve, beam angle and shading related to lamps and lanterns. Angle, master these basic principles, you will have a deeper understanding of light sources.
1. Color temperature
Color temperature refers to the color changes that the human eye perceives when light waves are in different energies.
In the calculation of color temperature, Kelvin is used as the unit, and 0° Kelvin = -273 °C of the black body radiation is the starting point of the calculation.
The black body is heated, and as the energy increases, it will enter the realm of visible light, for example, at 2800 ° K, it emits the same color light as the light bulb, and we say that the color temperature of the light bulb is 2800 ° K.
The color temperature change in the visible light field, from low color temperature to high color temperature is orange-red –> white –> blue.
Color temperature is a numerical value that measures and identifies wavelengths. Different wavelengths of light show different colors of light, so the color temperature of the light source has a great influence on color photography, especially natural light, whose color temperature will change with time, season, and geographical location. When it is necessary to correctly restore the color of the subject, such as retaking photos or painting and calligraphy works, taking ID photos, etc. When shooting, you must pay attention to ensure that the color temperature of the light is consistent with the color temperature required by the color film.
Color temperature does not refer to the degree of hot or cold light. The application of color temperature in photography is to measure the color components contained in the light. The classic definition of color temperature refers to: when the color of the light emitted by the light source is the same as that of the black body (refers to the object that neither reflects nor transmits under the action of radiation, but absorbs all the radiation falling on it. When the black body continues to be heated, the temperature When it continues to rise, the light emitted has a certain color, and its change order is red-yellow-white-blue) When the color of the radiated light is the same at a certain temperature, the temperature of the black body is called the color temperature of the light source, referred to as color temperature.
When sunlight is irradiated at 40° above the horizon in a cloudless atmosphere, the color temperature is 5500K. In 1983, the World Organization announced this as the standard sunlight to measure the color reproducibility of camera lenses.
For a traditional film camera, in order to accurately reproduce the color of the object, the first choice is to choose a film type with the same color temperature as the light source. Color film can be divided into daylight film and light film according to color temperature. Daylight color film is suitable for shooting in sunlight with a color temperature of about 5500K, and light color film is suitable for use in light with a color temperature of 3200-3400K. In addition, the color temperature can also be adjusted through a color temperature filter or post-production.
2. Luminous flux
The luminous flux is simply the energy of visible light, which refers to the sum of all radiant energy emitted by a light source and perceived by the human eye per unit of time. It is equal to the product of the relative visibility rate of the radiant energy of a certain band per unit time.
Since the relative visibility of the human eye to different wavelengths of light is different, when the radiant power of different wavelengths of light is equal, the luminous flux is not equal.
Illuminance is the abbreviation of light intensity, which refers to the number of lumens of luminous flux per unit area of the illuminated surface, in lux (Lux or LX), 1Lux=1 lumen/square meter, which is used to indicate the intensity of light and the degree to which the physical surface area is illuminated , We often say that the desktop for reading is not bright enough, that is, the illumination is not enough.
In the case of the same area, the higher the luminous flux of the light source, the higher the lumen value, and the higher the illuminance. Generally speaking, if the working environment is required to be bright and clear, the illuminance requirements will also be high. For example, the general lighting brightness of the overall space of the study is 100 lux, but the local accent lighting during reading requires at least 600 lux, so a desk lamp can be used as a local lighting fixture.
4. Color rendering index
Due to the different types of light sources, the actual color of the object seen will also be different. The so-called color rendering refers to the authenticity of the perception of the object under the light source and the perception of sunlight. The color rendering index indicating the degree of color rendering of the light source is called the average color rendering index. The lowest is 0 and the highest is 100. We can often see the color rendering value on the outer packaging of the light bulb. Generally, the average color rendering index is above Ra80, which is basically a color rendering. Sexual light source.
5. Luminous efficiency
Luminous efficiency refers to the luminous flux output by a light source that consumes 1 watt of electricity, expressed as the ratio of luminous flux to power consumption, and its unit is lm/W. The higher the luminous efficiency, the higher the efficiency of converting electric energy into light, that is, the less electric energy is consumed to emit the same luminous flux. Therefore, when choosing a truly energy-saving light bulb, the luminous efficiency value should be used as the final judgment standard.
6. Luminous intensity
Luminous intensity represents the physical quantity of the human eye perception strength emitted by the light source in a certain direction and range, and refers to the luminous flux emitted by the light source to a certain solid angle within a unit solid angle, referred to as luminosity, in candlelight.
Luminance refers to the luminous flux emitted by the self-luminous surface in a certain direction per unit area and per unit solid angle, that is, the bright intensity of the light reflected by the light source or object seen by the eye from a certain direction. Its unit is candela per square meter (cd/m2).
Glare is uncomfortable lighting that can cause interference, discomfort, or impaired vision because the brightness in the field of view is significantly greater than the eye can accommodate, or the light source contrast is too large. There are three types of glare:
1. Direct glare: It is generated by the eyes looking directly at the light source (lighting lamps), and the brightness of the light source is too large to cause dazzling and uncomfortable.
2. Reflected glare: Reflected glare is a common reflection, which will blur the image, easily cause eye fatigue, difficult reading, and even further cause sore eyes and headaches.
3. Background glare: glare not caused by direct light or reflected light, generally because the light source from the background environment enters the eyes too much, which affects the normal vision ability.
If you want to improve the glare in the environment, you can start from the following aspects:
1. Pay attention to the installation position of the design lamps, hide the excessively concentrated light source, and then use the reflection of the lamps to export the light source. Yilin Lighting ilin has always advocated the lighting design method of seeing the light but not the light, so that you can see the lighting but feel the lighting.
2. Use the semi-transparent lampshade material to weaken and disperse the excessively concentrated light source.
3. Use grid-type lighting fixtures to avoid looking directly at the light source.
4. The direction of light projection should be as perpendicular to the general horizontal direction of the human eye as possible.
5. For the desktop and book paper used for reading, avoid using materials that are easy to reflect light to reduce reflective glare.
9. Light distribution curve, camdlepower distribution curves
The light distribution curve refers to the light distribution state of the luminaire, which means that after the luminous body is coated with other media, the original luminous angle is changed by penetration or refraction, and the light drawn at 360° vertical, horizontal or oblique angles. Angle and intensity, but the common light distribution curve mostly refers to the vertical light distribution curve. From the light distribution diagram of the light distribution curve, it can be known that the light properties of the light-emitting lamps are direct, indirect or other light distribution ratios, which is helpful for professional lighting designers to calculate the illuminance and light source distribution.
10. Beam angle
Generally, the light source directly below the light source is the brightest, corresponding to the main axis of the light beam with the strongest luminous intensity. The angle formed by 50% of the luminous intensity on both sides of the main axis of the beam is called the beam angle, and the angle formed by the darker periphery is called the light distribution angle. Generally speaking, the light source of the projection light is concentrated, the beam angle is about 30°, and the ceiling light can reach about 140°. The size of the beam angle is affected by the relative position of the bulb and the lampshade.
11. Shading angle
The shading angle of a lamp refers to the angle formed by the tangent of the edge of the light outlet of the lamp and the level passing through the center of the light source. Under normal horizontal line of sight, in order to prevent direct glare caused by high brightness, the shading angle is generally greater than 30°, and 45° is considered to be the most comfortable angle.


There’s a new camera available for use at Studio 300! The Canon Vixia HF G20 is a versatile, lightweight camcorder that rivals the performance of more expensive camcorders without sacrificing pro-level features that appeal to true video enthusiasts and advanced amateurs.
- Dual SD Card Slot
- 32 GB of Internal Memory
- External Microphone Input
- 3.5-Inch Touch Pannel LCD Viewing Screen
- Dynamic SuperRange Optical Image Stabilization
Check out the video below for a better idea of the G20’s quality and versatility.
We’ve recently added Nikon gear to join our large inventory of Canon photography equipment. This includes a Nikon 5300 DSLR and several extra lenses that match our Canon inventory. Stop in to Studio 300 to see what’s available for use in the lab and for 3-day checkout.
When taking a picture, you often need to zoom in on distant subjects. A telephoto lens is the solution. Most DSLR cameras come with a stock lens of 18-55mm. While this lens is great for wide angle shots, it falls far short as a telephoto lens.
Studio 300 now has a Canon 55-250mm Telephoto Lens for our Canon T4i (and other) DSLR cameras. This item can be checked out for 3-days.
Picking up where the stock lens ends, this telephoto lens has a range of 55mm to 250mm. At 250mm, distant subjects can be easily pulled in and captured. The lens has both Auto Focus and Image Stabilization like the stock lens, and it’s easy to capture sharply focused shots without a tripod. If you’re curious what a telephoto lens can do for you, stop by Studio300 and we’ll show you how easy it is to use. Meanwhile, check out the two shots below.


Uwe Gruenefeld, Tim Claudius Stratmann, Wilko Heuten, Susanne Boll
Proceedings of the 19th International Conference on Human-Computer Interaction with Mobile Devices and Services
Nowadays, Mixed and Virtual Reality devices suffer froma field of view that is too small compared to human visual perception. Although a larger field of view is useful (e.g., conveying peripheral information or improving situation awareness), technical limitations prevent the extension of the field-of-view. A way to overcome these limitations is to extend the field-of-view with peripheral light displays. How- ever, there are no tools to support the design of peripheral light displays for Mixed or Virtual Reality devices. There- fore, we present our prototyping tool PeriMR that allows researchers to develop new peripheral head-mounted light displays for Mixed and Virtual Reality.


UV rays or Blue light? The material selected for a lens is fundamental, as it determines both comfort and clarity of vision. How to choose the right lens? UV rays or Blue light? How to choose the right lens? Vision needs change over time. T Let's take a look. Sunlight is made up of radiation at different frequencies, which includes: ultraviolet (UV) radiation, infrared (IR) radiation, and the visible spectrum (wavelengths from 390 to 760 nm), only a minimal portion of which is visible to the human eye. As we can see in this image, ultraviolet (UV) light has wavelengths of less than 390 nanometers. This light is filtered and doesn’t reach the retina, but it can be absorbed by the cornea, the conjunctiva, and the crystalline lens and has the potential to cause permanent damage. Ultraviolet (UV) radiation is in the invisible portion of the electromagnetic spectrum, from 100 to 400 nm, and can be divided into three ranges (i.e. UVA, UVB and UVC) based on their biologicaleffects. UV-C rays are 100% absorbed by Earth’s electromagnetic field. UV-B rays are 95% absorbed by Earth’s electromagnetic field and ozone layer. All of the UV-A radiation reaches the eye. The damage caused by UV-A radiation is cumulative and permanent and can affect the cornea, the crystalline lens, the iris, the retina, and relatedconjunctival and epithelial tissue: Dry eye and oxidative reactions of the conjunctiva Yellowing and loss of transparency of the crystalline lens Damage to the cornea This is why, just as we should protect our skin with sunscreen even on a cloudy day, it’s a good idea to use lens filters that protect our eyes from 100% of the potentially harmful UV rays, such as our NoUV 400 lenses. Divel Italia NoUV 400 lenses are the right choice for anyone who: • Spends a lot of time outdoors • Needs strong corrective lenses (NoUV is available in all indexes, from 1.50 to 1.74) • Want colored lenses for their prescription eyewear (our 1.50 index lenses are ideal for tinting) UV protection can be added to lenses by way of various coatings (such as our Performance NoUV). The difference lies in the fact that a NoUV lens is made with a material that absorbs UV radiation on its own. Filter coatings are applied to the outside of a lens, so care needs to be taken in order to keep the filter in good condition. Now let’s talk about blue light. When do you need lenses that block blue light? Visible blue light falls in the 400 to 500 nm range of the visible spectrum. The “low” end of the visible spectrum, particularly blue light in the 400-450 nm range, is known as high-energy visible (HEV) light and can be as harmful to our eyes as UV rays. Because it possesses a greater quantity of energy than light at other wavelengths, HEV light can damage the structure of the eye when it hits the retina. Our Blue Natural lenses block all light up to 420 nm, i.e. both UV radiation and high-energy blue light, while letting through the blue light we need to see colors normally. As you will probably be aware, electronic devices such as computers, phones and tablets are sources of blue light. Using eyewear that blocks blue light, like Divel Italia’s Blue Natural, is indispensable for anyone who: Spends a lot of time looking at screens (of computers, tablets, phones, TVs, etc.) Spends a lot of time outdoors Doesn’t have a particular need for corrective lenses but wants protection when using a computer (Blue Natural is also available as a neutral filter) So how do you pick between a NoUV or Blue Natural lens? It’s easy. Blue Natural protects against both UV rays and blue light, whereas NoUV alone is not enough if you spend a lot of time at a computer. Blue Natural is right for: People who work in an office or in front of screens, such as engineers, bank workers, doctors, graphic designers, photographers, lawyers, social media influencers, and anyone who spends a lot of time using a computer or playing video games. NoUV is right for: People who work outdoors or in open spaces, such as restaurant staff, construction workers, landscapers, architects, drivers, fuel-service workers, waste-management workers, postal workers, and anyone who loves outdoor activities like running, cycling, or hiking.


Metal halide is a type of light bulb that relies on the heating of a mixture of gases to provide light. Due to its high intensity discharge, the resulting light is incredibly bright, comparable to actual daylight.
Showing 10 of 11
Depending on their lighting needs, customers often turn to metal halide light bulbs for their advantages over halogen bulbs and other lighting sources. These advantages include:


An on-chip system is presented with integrated architectures for digital microfluidic actuation and sensing. Localized actuation is brought about by a digital microfluidic multiplexer layout that overcomes the challenges of multi-microdrop interference, and complete two-dimensional motion is shown for microdrops on a grid with minimized complexity by way of inputs. At the same time, microdrop sensing is demonstrated in a folded-cavity design for enhanced optical intensity probing of internal fluid refractive indices. The heightened intensities from this on-chip refractometer are shown to have a linear response to the underlying fluid refractive index. An electro-dispensing technique is used to fabricate the folded-cavity optical architecture in a format that is tuned for the desired refractive index range and sensitivity. The overall lab-on-a-chip system is successful in integrating localized microdrop actuation and sensing.


Lens 2″ x 4 1/4″ – #9 Glass Replacement Welding Helmet Lens – 1 PK
Lens 2″ x 4 1/4″ – #9 Glass
Provides maximum protection from ultraviolet and infrared radiation. Darker lenses are used for higher amperage work.
WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and reproductive harm.
For more information, go to P65warnings.CA.gov


Boston keratoprosthesis (KPro) type I is a technique to treat patients with corneal diseases that are not amenable to conventional keratoplasty. Correct assembly and central implantation of the prosthesis are crucial for postoperative visual recovery. This study investigates the potential benefit of intraoperative optical coherence tomography (OCT) to monitor KPro surgery. Retrospective case series are presented for two patients who underwent Boston KPro type I implantation. The surgery in both patients was monitored intraoperatively using a commercially available intraoperative OCT (iOCT) device mounted on a surgical microscope. Microscope-integrated intraoperative OCT was able to evaluate the correct assembly and implantation of the KPro. All parts of the prosthesis were visible, and interfaces between the corneal graft and titanium backplate or anterior optics were clearly depictable. Moreover, iOCT visualized a gap between the backplate and graft in one case, and in the other case, a gap between the anterior optic and graft. Neither gap was visible with a conventional surgical microscope. The gap between the anterior optic and the graft could easily be corrected. Microscope-integrated iOCT delivers enhanced information, adding to the normal surgical microscope view during KPro surgery. Correct assembly can be controlled as well as the correct placement of the Boston KPro into the anterior chamber.


Laser Vison Correction
You want to see the world each morning when you wake up.
You wonder what it would be like to open your eyes in the swimming pool and see clearly.
You imagine what it would be like to jog in the rain, or play with your children without worrying about your contacts or glasses even something as simple as seeing the alarm clock when getting up in the morning.
Laser vision correction can truly change your life, it is an alternative to eyeglasses and contact lenses that can help you see more, naturally. The concept behind laser vision correction is simple - reshaping the front of the eye to change its focusing power. These elegant procedures are safe and effective with the right patient. They are anything but trivial though, and require a great deal of careful consideration and personalization.
The goal of laser vision surgery is to reduce or eliminate the dependence on glasses and contact lenses by improving uncorrected visual acuity. LASIK can allow patients to achieve their normal daily activities without having to use either glasses or contact lenses.
Also known as refractive surgery, laser vision correction refers to elective eye operations that use a laser to reshape the cornea, and change the way light is focused or "refracted" by the eye. If you are nearsighted, far-sighted or have astigmatism and feel that glasses or contact lenses limit your activities, laser vision correction may be the right choice for you.
LASIK has treated nearsightedness (myopia), farsightedness (hyperopia) and astigmatism in patients all over the world.
Specific Advantages of LASIK
- Effective for correcting a wide range of focusing problems
- Fast visual recovery
- Minimal temporary side effects
- Permanent tissue modification for lasting correction.
The Center Vision Recovery uses the Teneo Technolas 317 Excimer laser and the Victus Technolas Femto laser. Both of these devices are considered state-of-the-art. The combination of both of these devices guarantees predictable and reliable results and extreme precision using a quick, painless and safe technique.
Center was founded in 1997 on the base of the biggest in Russia State Research Institute of Eye Diseases
Most of them are the most difficult, until recently, not performed anywhere.
Years of experience, latest equipment and modern technology features of our clinic.
Your application is accepted!


STEMMER IMAGING is a leading international machine vision technology provider. With staff located across Europe and Latin America, we provide state-of-the-art machine vision solutions, extensive knowledge and outstanding customer service.
VISION.RIGHT.NOW. symbolises our mission to make machine vision easy and accessible, empowering customers to deliver world-class solutions.
15/03/2023 | Reading time: 3 min
Why are vision systems so interesting for sports applications?
02/02/2023 | Reading time: 4 min
Embedded vision systems are on the rise
24/11/2022 | Reading time: 2 min
STEMMER IMAGING Modular Embedded: More speed thanks to TCP offload
05/10/2022 | Reading time: 3 min
A new (Embedded) Vision: STEMMER IMAGING introduces Modular Embedded Ecosystem
23/09/2022 | Reading time: 1 min
Our vision expert Mark Williamson engages in VDMA panel discussion about smart 2d/3d sensors
21/09/2022 | Reading time: 3 min


SPADs II: Arrays
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Superconducting nanowire single-photon detectors integrated with waveguide circuits for quantum information science
Gigahertz-gated InGaAs SPAD system with avalanche charge sensitivity approaching the fundamental limit
MiSPIA: microelectronic single-photon 3D imaging arrays for low-light high-speed safety and security applications
Single nanocrystal spectroscopy approaches for investigation of emission efficiency and recombination dynamics of multi-excitons
Performance of a compact position-sensitive photon counting detector with image charge coupling to an air-side anode
High speed multichannel time-correlated single photon counting electronics based on SiGe integrated time-to-digital converters


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FC APC - FC APC SM Simplex 2.0mm Fiber Optic Patch Cables Single Mode 9 / 125 LSZH Jumper
Patch Cords are used to provide optical connection for fiber optic electronics. The use of the patch cord provides a quick and easy method for routing fiber patches in data centers, head-ends, cellular hubs and central offices. The patch cord can be used in interconnect or cross-connect path connecting the incoming fibers to the electronic equipment and providing patching within the fiber paths. Patch Cords include simplex, duplex and Multi-fibers assemblies.
The 9/125μm OS2 single mode bend insensitive fiber optic cable is less attenuation when bent or twisted compared with traditional optical fiber cables and this will make the installation and maintenance of the fiber optic cables more efficient. It can also save more space for your high density cabling in data centers, enterprise networks, telecom room, server farms, cloud storage networks, and any places fiber patch cables are needed.
This 9/125 OS2 single mode fiber optic cable is ideal for connecting 1G/10G/40G/100G/400G Ethernet connections. It can transport data for up to 10km at 1310nm, or up to 40km at 1550nm.
FC: EIA /TIA-604-04, FOCIS4, NTT-FC, GR-326. IEC61754-13 and JIS C5973
FC APC - FC APC Single Mode Simplex Fibre Optic Patch Cables SM SX Patch Cord/Jumper
|Connectors||FC/APC to FC/APC||Jacket OD(mm)||2.0|
|Fiber Mode||9/125μm||Jacket Color||
|Cable Type||Simplex||Jacket Material||LSZH/PVC/OFNR/OFNP|
|Return loss||SM APC ≥ 60dB(min)||Insertion loss||≤0.3dB(IEC Grade C)|
|Operating temperature||-40~75°C||Storage temperature||-45~85°C|
Geometric Specification (only for 3D interferometer tested)
|Items||Connector||PC End-face||APC End-face|
|Radius of Curvature||SC/FC/ST||10~25 mm||5~12 mm|
|LC/MU||7~25 mm||5~15 mm|
|Apex Offset||≤50 um|
|Fiber Spherical Height||+/- 100 nm|
End-face Quality (SM)
|A: Core||0 to 25||None||None||IEC 61300-3-35:2015|
|B: Cladding||25 to 115||None||None|
|C: Adhesive||115 to 135||None||None|
|D: Contact||135 to 250||None||None|
|E: Rest of ferrule||None||None|
Single Mode 9/125 Duplex FC/APC- FC/APC Optical Fiber Patch Cord/ Jumper
E2000-E2000 Single Mode Duplex Optical Fiber Patch Cord/Jumper
SC-SC Duplex Drop Cable Patch Cord Patch Cable
YOFC G.657.A1 bend insensitive fiber
10.0mm minimum bend radius
Insertion loss and return loss testing
3D interferometer test
2. Active dvice termination
3. Telecommunication networks
5. Local Area Networks(LANs)
6. Data Processing networks
7. Test Equipment
This easily taken and well-protected fiber patch cable package has been labelled and marked by OMC as default
.Standard carton size : 34*22*15 cm; 44*34*24 cm ; 54*39*34 cm . Which carton to be used depends on goods
Qty . Packing can be customized.
OMC industry co., limited, which was founded by an expert team, has been exporting FTTX passive products since 2007. We focus on providing innovative and integrated FTTX solutions for a variety of applications/Networks. Our capabilities include product/solution design, development, enhancement and integration. Our products are among the highest performing in the industry and truly represent the best values in the industry. We also offer training, pre and post-sales support. We help you select the right products for your Optical network's needs.
1. Are you the real factory?
Yes,we are the real factory more than 10 years
2. What is your main products?
Outdoor fiber optic cables; indoor fiber optic cables;FTTH Drop cables;
Indoor armored patch cords fiber cable; Optical patch cords SC/LC/FC/ST; MTP/MPO optical patch cord.
3. Do you have certificate for raw material?
We build long-term relationship cooperation with qualified ISO9001, ROHS raw material suppliers.
4. What is your delivery time?
Within 24 hours for normal kinds of fiber optic cable;
3~5 days for fiber optic patch cords with 10000 connectors.
5. MOQ: what is your minimum quantity?
MOQ for fiber optic cables: 1KM
There is no MOQ required for fiber optic patch cords,as there’s stock for normal kinds.
6. Do you have distributor in other country or domestic?
Until now, we sell our products to customers directly. And factory price could be offered.
For large orders: T/T, L/C
For small orders: T/T,Western Union and Paypal are acceptable


Photometric Testing Solutions
Customized solutions for add-ons and accessories.
You can read about our experience in the research and product development of light measurement equipment. Unless you do not find a solution to your measurement needs, please send a message and we can plan together.
Spectrum and lumious flux measurements of LED modules and user-friendly measurement software
FL-1 Testing system
Turn-key measurement system for testing the light quality of the flashlight according to ANSI / NEMA FL 1-2009 standards
The product line tester for reliable color and light output checks of the luminaires in their production lines
SSL Resource Oy provides research and product development for light measurement equipment. We have been involved in a number of testing equipment development projects, such as the development of completely new automated hardware or the repair and improvement of old hardware. Our photometric measuring equipment ranges from laboratory-level measuring devices to automated product testing systems. Contact us, and we will find best solutions for your needs!


Agilent 81633B Optical Power Sensor
The Agilent 81633B is a single input optical sensor plug-in module that fits the 8163, 8164 and 8166 multichannel mainframe series. The Agilent HP 81633B InGaAs sensor element covers a wavelength range of 800 to 1700 nm and offers a dynamic range of +10 to -90 dBm. Many different connectors are available for the 81633B power meter interface.
Click the PDF Specification for further information.


It's the camera manufacturer that documented the moon landing. Its build quality and design are one thing, but the images it takes with its Sony sensor and lenses are truly one of a kind. In this video, Business Insider breaks down why it's so expensive, and gives a rough estimate of how many they sell each year.
The assembly and testing are all done by hand. That's not common in the world of camera production. Each part of the camera is put in place by a specialist. The sound, friction, and feeling of pressing the shutter button are all tested to give the photographer that feeling which they believe is worth the money.
It's not a camera I can afford, and I don't believe I'll ever buy one, but I do understand the value of quality in the images it produces, not only in the medium format size of the sensor, but also in the color science and attention to detail with regards to matching reality.
The cameras are used in fashion and the documentation of art catalogs. Color is crucial here, and according to the video, there's no other camera like it. This was always up to the film producers back when film was the only option, but now with sensors in the camera, it's companies like Hasselblad that see the value in their products, and then the thousands who buy the cameras and lenses every year.


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When distance or lighting conditions no longer enable you to see your laser beam, laser detectors offer the solution for any general construction and outdoor applications. With Seco laser receivers, you can use your laser levels in the field, even in broad daylight because these devices are designed to easily pick up the laser that is being generated by your laser level. They are built construction-tough, designed to work in harsh environments, and provide precise accuracy.
Types of Laser Detectors
Matched to work with red, green or infrared laser beams, laser receivers are available for both line lasers and rotary lasers, allowing you to work at the lasers maximum range within any visibility limitations. Laser detectors have various accuracy settings to accommodate your different job site needs. These include different numbers of display channels and bandwidth, multiple sizes of single or dual LED and LCD displays for visual reading of level and grade position, audio and memory function so you can easily locate the last signal recorded, and even options to block out other laser or strobe interferences. All laser detectors we offer are water and dust resistant and have long battery lives.
Remote Control Capability
Designed for double duty, some laser receivers feature a built-in remote control to further increase productivity. This allows you to control the grade, scanning and rotation speeds from a remote location, avoiding tiring trips to your rotary laser.
For accurate and stable measurements, laser receivers also include different types of mounting systems. Built-in magnets securely attach the laser detector to metal surfaces for use at greater distances and ceiling applications, while many come with a heavy-duty bracket, ideal for mounting on grade, leveling and surveying rods.


Rokinon has announced a new line of cinema lenses aiming at higher-end cinema applications while maintaining the aggressive pricing strategy that marked the company’s earlier line of cinema lenses.
The new Xeen lenses will share the same optical formula and groupings as the existing Cine DS line (which stays in the market as well). But there will be several critical differences distinguishing the Xeen products from the Cine DS lineup. Among them:
* new and improved optical coatings
* longer, 200-degree focus throw
* tighter color testing
* revamped construction and housing for greater stability and durability
* a 3 year warranty (vs. 1 year for DS lenses)
* PL mount option
* the ability to shim the lens mount (an option that Rokinon advises is better left to rental houses than end users)
* 114mm diameter filter threads for mounting matte boxes
* 11 aperture blades for a more rounded bokeh (vs. between 6-9 blades for Cine DS models)
Like the Cine DS line, the Xeen lenses will have uniform focus and aperture dials, focal markings on either side of the lens and apertures calibrated in T-stops.


Optical-Electrical-Optical (OEO) wavelength translation (WT) based on small-form-factor pluggable (SFP) transceivers is meeting with increased interest in metro optical-network applications. It provides a flexible and low-cost solution when it interfaces with legacy optical equipment that does not support International Telecommunications Union (ITU) wavelengths. WT improves the performance of optical systems by changing the operating wavelength of the incoming optical signal to a wavelength that enables longer reach through lower attenuation or lower dispersion penalty.
Besides being protocol independent, WT presents an opportunity to deploy an optical source with a narrower linewidth, extending the optical link through better dispersion management. This is especially useful for higher-speed systems, such as OC-48 running on 1300- nm systems, requiring link extension. Data-com signals at 850 nm running on multimode fiber can profit also from WT that allows the system to run on single- mode fiber at 1550 nm, eliminating multimode dispersion.
The primary component that has made WT possible is the SFP transceiver consisting of a transmitter, receiver, and microcontroller. The transmitter module consists of a laser and laser-drive circuitry that may include a thermoelectric cooler (TEC). The laser could be: an uncooled, single-mode, distributed-feedback (DFB) laser with its center wavelength anywhere in the range of 1480 nm to 1580 nm (typically at 1550 nm); a coarse wavelength division multiplexing (CWDM), ITUgrid wavelength, cooled DFB laser at a wavelength whose peak is centered at 100-GHz spacing on the ITU-grid; a 1310-nm multimode Fabry-Perot (FP) laser; or a multimode 850-nm vertical cavity surface emitting laser (VCSEL).
The receiver is a PIN- or APD-based module, depending on the link budget, with a trans-impedance amplifier (TIA) and limiting post amplifier. The attainable link reach after WT is a function of both transmitter and receiver and could be short (up to 10 km), intermediate (up to 60 km), long (up to 100 km), or extended-reach (up to 160 km).
Today, most SFP transceivers comply with a multi-source agreement (MSA) signed by many vendors to guarantee compliance and interchangeability of modules. These transceivers offer hot-swappable modules that utilize single 3.3-V power sources to minimize power consumption.
The SFP transceiver receives a non-return- to-zero (NRZ)-encoded optical signal and converts it into a low-noise CML (current mode logic) or LVPECL (low-voltage positive referenced emitter-coupled logic) compatible electrical signal. The transmitter is compatible with both CML or LVPECL input data levels. SFP transceivers are incorporated with a digital diagnostic feature to report transmitter and receiver status. They can be used for data rates from 50 MHz to 2.7 GHz and support SONET, Gigabit Ethernet, and Fiber Channel in addition to datacom products. A datacom SFP transceiver has to satisfy IEEE standard (Gigabit Ethernet 802.3) or American National Standards Institute’s (ANSI) Fiber Channel, FC-PI specifications. SONET protocol SFP transceivers must satisfy Telcordia qualification requirements.
Figure 1 shows a WT block diagram used to convert an 850-nm TDM signal to a 1550-nm signal for transmission to a remote site. The 850-nm signal could be a 1 Gb/s data signal on 200 MHz-km, multimode fiber that needs to be sent to another network site kilometers away. The conversion to 850 nm can be to a TDM signal at 1550 nm, a CWDM wavelength or a DWDM (dense wavelength-division multiplexing) wavelength on the ITUgrid. The choice of system is a matter of distance between sites, bit rate, and budgetary consideration.
Wavelength translation and regeneration find applications in link extensions to overcome loss and dispersion limitations in network upgrades. For example, a 1310-nm legacy network can be converted to a DWDM network that would improve link capacity and network management without resorting to the expense of electrical multiplexing and the transmission of higher bit-rate signals. Link capacity is increased by converting many 1310-nm signals in different fibers to a corresponding number of 1550-nm DWDM channels, each operating at the original signal bitrate, that could be multiplexed optically into a single fiber and managed using current technologies such as reconfigurable add/drop multiplexers (ROADM).
An example of the type of practical problems that can be addressed with wavelength translation is shown in Figure 2. In this case, the number of bits transmitted between the networks is the same. The lower bit-rate signals are multiplexed optically and then transmitted using optoelectronics designed to handle the original bitrates. Alternatively, these lower-bit-rate signals can be multiplexed electrically to a higher rate so that higher bit-rate optoelectronics must be used. With the signals translated to 1550 nm using a proper optical source (e.g., a narrow-linewidth laser), the stage is set for the use of optical amplification, dispersion compensation, and other signal-massaging techniques required to transmit over longer distances.
This article was written by Ahmad K. Atieh, Ph.D., senior optical engineer, and Paul Vella, Ph.D., vice president of optical engineering, for BTI Photonic Systems. For more information on wavelength translation using SFP transceivers, contact the authors at


Vyacheslav A. Trofimov; Vladislav V. Trofimov
As it is well-known, the passive THz camera allows seeing concealed object without contact with a person and this camera is non-dangerous for a person. Obviously, efficiency of using the passive THz camera depends on its temperature resolution. This characteristic specifies possibilities of the detection for concealed object: minimal size of the object; maximal distance of the detection; image quality. Computer processing of the THz image may lead to many times improving of the image quality without any additional engineering efforts. Therefore, developing of modern novel computer code for its application to THz images is urgent problem. Using appropriate new methods one may expect such temperature resolution which will allow to see banknote in pocket of a person without any real contact. Modern algorithms for computer processing of THz images allow also to see object inside the human body using a temperature trace on the human skin. This circumstance enhances essentially opportunity of passive THz camera applications for counterterrorism problems.


P1.9 Ultra HD Full Color High Refresh Big LED Screen Wall Indoor
Advertising LED Display
The P1.923 full color indoor advertising led display is super
high-resolution, which is one of the most apparent features for the
new generation of small pixel pitch LED display, which can offer
our viewers more excellent display effect. High refresh rate,
excellent image quality, extremely viewing distance are the major
attentions to our customers. The size of the display can be
customized and details can be based on customers' request.
Convenient assembling and disassembling can save customer's time
and labor cost.
The range of application such as hotel advertising, stage renting,
television, shopping malls, big markets, outdoor stadiums,
concerts, fairground, sightseeing districts, indoor advertising
media, enterprise engineering, cultural tourism, image promotion,
commercial real estate, etc...
The total amount of heat reduced
Using energy-saving (low constant current from the control point),
high efficiency constant current chip;
Using high brightness and high efficiency of LED lamps.
The automated process
All using SMD process, fully automated machine operation, reducing
human error and damage and improves reliability.
Low failure rate
Using sophisticated type of material, in terms of testing:
instrument light intensity distribution, it is a direct measurement
of the LED lamp light intensity, viewing angle, wavelength, and
other optical properties; aging test LED lamps attenuation; an IC
testing stand, strict control the quality of the IC.
High-temperature aging at the end of the production process and
cabinet vibration test, good control of Weld and other issues.
Fast locks and assembling pins, flatness and seamless are greatly
increased, less than 0.01mm , easy to install and dismantle
Seamless connection, less than 0.1mm between 2 cabinet.
|NO.||Product name||P1.923 indoor led display|
|1||Pixel Pitch(mm)||1.923 mm|
|2||Pixel configuration||1R1G1B/SMD 1010|
|3||Pixel density||270400 dots/m2|
|6||Cabinet Resolution (W*H)||210dots x 157dots|
|8||Cabinet size (W*H)||400mm×300mm|
|9||Drive IC||MBI 5153|
|10||Drive mode||1/26 scan|
|11||Viewing Angle(V/H)||140 ºC|
|12||Grey Scale||65536 degree|
|13||Life time||>70,000 Hours (50%)|
|17||Screen Power Consumption||Max: 580w/m2; Average:185w/m2|
|18||Input Power Frequency||50/60Hz|
|22||Control Method||Synchronized with computer monitor|
|24||LED control system||LINSN,Nova-star,Colorlight is selectable|
|25||Control Distance||100 m (no repeating); Optical fiber transmission: 500m- 15km|
|26||Accepting signal with video processor||PAL/NTSC/SECAM,S-Video;VGA;RGB;Composite Video;SDI|
|27||Systems Operating Platform||Windows Xp / Windows 7 / windows 8 /8.1 / windows 10|


A patented system which enables the use of moving light sources within footage captured at any speed, including the frozen world of high speed imaging.
When using a high speed cinema camera and light sources moving at over 10,000 feet per second, this technology creates the ability to move light sources within images frozen in time.
-Software controls the movement of light sources and the movement of the scene as independent variables.
-Control the speed of the light relative to the action (acceleration, deceleration - time ramping to / from real time and time-lapse).
-Light sources can be moved on any path (straight line, curve, and / or multiple paths)
-Light sources can illuminate in any pattern (randomly, in sequence, in a prescribed formation
Predominantly used with high speed cameras such as the Vision Research Phantom, but can also be used with industry standard cameras such as the Arri Alexa and Red Weapon, or even a DSLR, to provide dynamic moving light at various frame rates.
PATH OF LIGHT
Light sources can be moved on any path (straight line, curve, and / or multiple paths)
Raw test footage of moving light in a straight line through a space -- parallel and perpendicular to the film plane.
SPEED OF LIGHT
Our software controls the speed / acceleration / deceleration of the light. Moving light can be synchronized with slow motion, real time or time lapse footage, or even shift between varying frame rates with in-camera time ramping.
Moving light slows down from thousands of feet per second to tens of feet per second, then accelerates again. The resulting footage speeds up and slows down, while light sources move at the same pace throughout.
An example of the fastest movement of light (relative to the movement in the scene) that we've shot. The action is almost completely frozen as light moves around in a full loop.


Sony announced that it has its own Google Glass competitor in the works called SmartEyeglass. A software development kit for the gadget is already available to interested developers.
Sony SmartEyeglass packs a number of sensors that include CMOS image solution, accelerometer, gyroscope, compass, microphone, and brightness sensor. Coupled with GPS location from a connected smartphone, the range of sensors help the device deliver relevant information to the user through unique hologram optics.
The product’s lens has 85% transparency and is just 3mm thick. It doesn’t require vision-obscuring half mirrors to work. The monochrome display on the other hand, couples high readability with low energy consumption.
The device works with smartphones running Android 4.1 and up. The CMOS camera requires Android 4.3 and up.
The product you see in the image above is a rather ungainly looking development prototype with external battery. I truly hope that by the time it reaches regular users, Sony SmartEyeglass will look considerably better.