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White Light Interferometry for Highly Accurate Thickness Measurements Aug 1, 2018 — White light interferometry (WLI) is a common system of measurement with a long history and a variety of applications, which currently include surface profiling1, medical imaging, and — as in the past — thickness measurement. Also known as coherence scanning interferometry (CSI), vertical scanning interferometry (VSI), and optical coherence tomography (OCT), these systems, regardless of their names, are characterized by the same components: a broadband light source, reflection from one or more...
Photonics Spectra, Sep 2018
Harsh-Environment Fiber Optics for Aerospace Jul 31, 2018 — In its most basic form, bare optical fiber consists of a silica core and a cladding whose indices of refraction vary slightly. However, bare fiber is not very useful beyond a laboratory setting because its performance is highly susceptible to its...
Photonics Spectra, Sep 2018
Nanometer-Scale Automation for Optical Device Manufacturing Jul 27, 2018 — Manufacturers of optical devices know the importance of mature industrialized processes built around the cost savings of automation. These processes have made manufacturing optical devices economical in a number of speed- and bandwidth-sensitive...
Photonics Spectra, Sep 2018
Tunable Laser Light Sources Advance Nanophotonics Research Jul 26, 2018 — A considerable part of contemporary photonics research that investigates the interaction of light with nanoscale objects — nanophotonics — is motivated by the commercial potential of real-world devices. A vast number of experimental studies call for...
EuroPhotonics, Sep 2018
Lensless Cameras May Offer Detailed Imaging of Neural Circuitry Jul 19, 2018 — Understanding brain function at the scale of individual neurons could open the door for advanced understanding of animal and human behavior and the mechanisms of neurological disorders such as Alzheimer’s. But the size scale of neurons and...
BioPhotonics, Aug 2018
Optics Tools Advance in New Forms with Space Exploration Jul 12, 2018 — With a new generation of large telescopes comes new challenges for optics. Some mirrors, for instance, must be large but flexible to perform wavefront correction and make the images as clear as possible. The shape of future optics will be different...
EuroPhotonics, Sep 2018
Quiet Lasers, Cool Science Jun 27, 2018 — In the 1960s, just a few years after the laser was invented, researchers contemplated its use as a precision tool to control the motion of neutral atoms. Early research focused on the use of an opto- mechanical force based on the scattering of...
Photonics Spectra, Aug 2018
Terahertz Spectroscopy on the Cutting Edge of Material Testing Jun 27, 2018 — Just a few years ago, the application of terahertz radiation seemed obscure at best. If experts were asked for killer applications, few could be named. In 2018, however, terahertz measuring instruments are showing significant market potential....
Photonics Spectra, Aug 2018
Smartphone Spectroscopy Promises a Data-Rich Future Jun 26, 2018 — The seminal 1960s television series “Star Trek” delivered futuristic inventions and Captain James T. Kirk’s roguish smile into American homes on a weekly basis. Among the show’s memorable gadgets were the communicator, which inspired the design of...
Photonics Spectra, Aug 2018
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Improving Automation with 3D Vision Jun 26, 2018 — If a traditional picture is worth a thousand words, what’s the value of a 3D image? Quite a bit when it comes to automation. Consider a robot picking a part out of a bin in an automated assembly line. “If you want to accurately grab a pinion out of...
Photonics Spectra, Jul 2018
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Better Filters Yield Better Sensor Performance Jun 26, 2018 — From weather satellites to lidar for self-driving cars, precision optical filters play a vital role in making sensors work. Today, the ability to interrogate more and more sections of spectrum promises enhanced capabilities for these and other...
Photonics Spectra, Aug 2018
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Navigating Best Laser Choices Crucial for Microwelding Jun 25, 2018 — Four distinct laser types are suitable for microwelding: pulsed neodymium-doped yttrium aluminum garnet (Nd:YAG); continuous-wave (CW) ytterbium-doped fiber; quasi-continuous-wave (QCW) fiber; and nanosecond pulsed fiber. Each laser offers unique...
Industrial Photonics, Jul 2018
Catching Up with Kent Jun 25, 2018 — Q: Were you serious about science as a young person? Was there a pivotal event or person who really put you on the path? A: Actually, I wanted to be a musician. It just took me a while to realize that wasn’t in the cards. I had a math teacher who...
Photonics Spectra, Aug 2018
Minimizing Stray Light in Everyday Optical Systems Jun 22, 2018 — Very often when optical engineers hear “stray light” or see a requirement for some level of either stray light analysis or testing, they become concerned. They wonder how such a simple system can have stray light problems. Or they think stray light...
Photonics Spectra, Aug 2018
Lasers for Micromachining: Shorter Pulses, More Power Jun 5, 2018 — Smaller devices, tighter tolerances, and higher performance demand finer and finer features — hence the increasing need for micromachining. For lasers, this often translates into a requirement for shorter pulse widths. However, these must be at the...
Industrial Photonics, Jul 2018
Vision Systems for 3D Measurement Require Care to Ensure Alignment Jun 1, 2018 — Calibration, pointing accuracy, and repeatability are critical to the success of vision systems for measurement. This is especially true for precise 3D multicamera measurement applications where single-pixel measurements are needed to help machine...
Industrial Photonics, Jul 2018
Optical Interconnects Set to Achieve Bandwidth Benchmark May 30, 2018 — Countless emails, text messages, pictures, and videos are posted on social media every day, along with unfathomable amounts of data that must be processed by the likes of Amazon and Google. All of this information must be stored and processed in...
Photonics Spectra, Jul 2018
Patterned Photovoltaic Absorbers Harvest Sunlight Better May 30, 2018 — Recent reports forecast solar power will become the world’s cheapest form of energy within the decade. The dramatic decrease in the price of photovoltaic (PV) solar modules in recent years (now hovering around 31 cents per watt peak) has resulted...
Photonics Spectra, Jul 2018
Extreme UV Keeps Pace with Moore’s Law May 30, 2018 — For years, 193-nm immersion lithography enabled foundries to create increasingly smaller features on silicon wafers. The technique involved shining 193-nm light through a patterned surface that cast a pattern onto a blank silicon wafer. But problems...
Photonics Spectra, Jul 2018
Fluorescence Microscopy Unravels Morphogenesis, Function of Lymph System May 24, 2018 — The lymphatic system is an underinvestigated part of the vascular system. A team led by Friedemann Kiefer at the European Institute for Molecular Imaging (EIMI) at the University of Münster in Germany is aiming to change that in ongoing studies...
BioPhotonics, Aug 2018
Vapor Deposition Method Suits Coating Curved Optics May 24, 2018 — Antireflection (AR) coatings are some of the most extensively employed types of optical thin films. By reducing the amount of light reflected from a surface, such coatings improve system throughput, increase contrast, and enhance signal-to-noise...
Photonics Spectra, Jul 2018
Double-Helix Point Spread Function Delivers Precise Extended-Depth Microscopy May 23, 2018 — Light microscopy is a powerful method used in many scientific disciplines, including the life sciences, to visualize finer details in samples. The use of fluorescence enables specific targeting and labeling of biomolecules and other chemicals....
BioPhotonics, Aug 2018
OLED-on-Fabric Could Be the Next Wearable Wonder May 22, 2018 — It started with the fitness tracker. And thanks to continued advances in sensors, computing power, and energy harvesting, the age of IoT-based wearable technologies is upon us. For broader adoption, however, tomorrow’s wearable must feature display...
Photonics Spectra, Jul 2018
Thermal Camera-Equipped UAVs Spot Hard-to-Find Subjects May 15, 2018 — The enormous growth in the drone, or small unmanned aerial vehicle (UAV), industry over the past five years has changed the way many industries operate, and the trend is not slowing down. Business Insider Intelligence predicts year-over-year growth...
Photonics Spectra, Jun 2018
Continuously Variable Bandpass Filters Aid Optics and HSI May 14, 2018 — Hyperspectral imaging (HSI) has been in use for a couple of decades in applications such as satellite imaging and air reconnaissance. Despite its widespread use, there is a lack of clarity of what “hyperspectral” encompasses. Sometimes techniques...
Photonics Spectra, Jun 2018
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