Headaches are a common symptom of altitude sickness. But they may not have to be. Researchers from University Hospital Frankfurt have turned to NIR spectroscopy to study ailments associated with altitude sickness, namely its tendency to reduce oxygen and blood flow to the brain, which often leads to headaches. The researchers monitored this in six people climbing Mount Kilimanjaro, the world’s highest free-standing mountain range at 5895 meters (19,340 feet) above sea level. Using NIR spectroscopy, they monitored changes in the concentration of both oxygenated and...Read full articleRelated content from Photonics MediaARTICLESAI-powered Diagnostic Imaging Tool Estimates Hemoglobin LevelsA collaboration between SigTuple Technologies and the Indian Institute of Science demonstrated an AI-powered, imaging-based tool for the estimation of hemoglobin levels. The setup combines a...BioPhotonics May/Jun 2021 IssueNIR Spectroscopy Could Provide Window into AD Pathology, TherapeuticsTo detect Alzheimer’s disease (AD) in its early stages, researchers at the VA Bedford and VA Boston Healthcare systems developed a noninvasive optical technique that uses near-infrared...Photonics.com 9/1/2021Spectral Mapping of Heart Tissue Could Help Improve Ablation TherapyAn ablation catheter incorporating near-infrared (NIR) spectroscopy mapping was able to distinguish various tissue types in hearts donated from patients with cardiovascular disease. Using this...BioPhotonics Sep/Oct 2020 IssueStartup Integrates Research-Grade Brain Imaging into Wearable CapNeurotechnology company Kernel has developed a wearable headset device for brain measurement. The device, called Kernel Flow, is based on time-domain functional near-infrared spectroscopy (TD-fNIRS)...Photonics.com 1/31/2022PRODUCTSCMOS SensorThe Apx60 high-resolution CMOS sensor from Atik Cameras Ltd. is built for the industrial, scientific, and OEM sectors. The large device employs 61 MP over a 43.3-mm diagonal sensor. With no amp...Photonics.com 11/24/2021SWIR LEDsThe Epitex D-Series of SWIR LEDs from Ushio achieves a two-fold improvement of output and efficiency over its predecessor for the majority of wavelengths. Low-power chips are mounted in...BioPhotonics Nov/Dec 2020 IssueSurface and Image Analysis SoftwareThe Mountains® 9 software platform from Digital Surf is designed for surface and image analysis. Version 9 includes MountainsSpectral® for correlation and spectroscopy analysis, as well...Vision Spectra Autumn 2021 IssueTunable Calibration SourcesThe SpectrALL series of tunable spectral calibration sources from Labsphere Inc. have been announced by SphereOptics GmbH. The SpectrALL series includes several models engineered for the...Photonics Spectra April 2021 IssuePHOTONICS HANDBOOK ARTICLESAdaptive Optics: Taming Atmospheric Turbulence: For more than three centuries, the Earth’s atmosphere has frustrated astronomers. The layer of gases that we breathe also distorts the images formed by telescopes. This means that conventional telescopes of more than a few centimeters in diameter cannot reach the resolution limit set by their optics.To Isaac Newton the problem was clear, and in 1704 he realized the effects of atmospheric turbulence on image formation. Just as heat waves shimmering above a hot patch of ground can distort our...Photonics HandbookCamera Resolution: Combining Detector and Optics Performance: Most image-quality discussions center on resolution, which is thought to uniquely determine system performance. Resolution, however, is a more complex concept.Camera resolution depends upon the optical blur diameter and the detector size. Schade combined these to create an equivalent resolution that is a function of Fλ/d where F is the focal ratio,...Photonics HandbookSWIR Imaging: An Industrial Processing Tool: Short-wave infrared (SWIR) imaging with InGaAs-based cameras is well suited to nondestructive identification of materials, their composition, coatings, and other characteristics.Imaging has long been used in industrial processes to measure, monitor, control, or otherwise manage the production of goods. The challenge to the process designer is to develop a tool that captures...Photonics HandbookAspheric Lenses: Design Considerations: This first of two articles will cover design and manufacturing options for aspheres; the second will include more detail on manufacturing and testing processes. These articles will provide the tools optics designers need to tailor their designs to the appropriate manufacturing process and to optimize the cost of component fabrication.Aspheric surfaces are powerful tools that combine the optical corrections of multiple lenses into a single element (Figure 1) and affect performance in ways that spherical optics cannot. For example,...Photonics HandbookWHITEPAPERSFractional Pixel Method for Improved Pixel-Level Measurement and Correction (Demura) of High-Resolution DisplaysAs display resolutions increase, imaging systems are challenged to continue to provide accurate pixel-level measurements while applying increasingly limited relative imaging resolution during...Photonics.com 1/14/2021Using Imaging Colorimeters to Correct OLED, MicroLED, and Other Emissive Displays for Production Efficiency and YieldsImaging colorimeters can improve OLED and microLED display production by ensuring visual quality of displays — measuring brightness and color uniformity at the pixel and subpixel level to correct...Photonics.com 1/14/2021Methods for Measuring Display Defects and Mura as Correlated to Human Visual PerceptionHuman vision and perception are the ultimate determinants of display quality, however human judgment is variable, making it difficult to define and apply quantitatively in research or production...Photonics.com 1/14/2021Automated Solutions for SAE Standard HUD MeasurementHead-up display (HUD) technology is one of the largest growth areas in the automotive market, and standard measurement criteria are rapidly being defined to evaluate augmented projections for visual...Photonics.com 1/14/2021WEBINARSBiophotonic Imaging for Medicine: A Digital ConferenceResearchers from around the world presented their latest work at “Biophotonic Imaging for Medicine: A Digital Conference.” Presentations focused on a range of light-based imaging and...Photonics.com 6/11/2015Neuroscience in the Everyday WorldRecent advancements in wearable functional NIR spectroscopy (fNIRS) devices and signal processing tools expand the repertoire of unconstrained experiments for neuroscientific research. Meryem Ayse...Photonics.com 10/27/2021Raman Spectroscopy for Research and IndustryFREE WEBINAR Additional Questions and Answers from the Webinar are below: Speakers to include: David J. Brady, Duke University Computational and Compressive Raman Spectroscopy ...Photonics.com 6/24/2013European Photonics Manufacturing Services Funded by ECThis event is supported by the European initiatives presented and is moderated by EPIC, the European Photonics Industry Consortium. The European Commission is helping companies access the...Photonics.com 6/30/2021PHOTONICS DICTIONARY TERMSnear-infrared spectroscopy cerebral oximetryA monitoring technique used to measure the oxygen saturation levels in the brains of patients, commonly in operating room and neonatal intensive care unit settings. The technique, which is based on...EDU.photonics.com 6/30/2017hematofluorometerA photoanalytical instrument for analysis of jaundice conditions in infants that measures bilirubin (a breakdown product of hemoglobin that produces jaundice), albumen-carrying capacity and binding...EDU.photonics.com 9/8/2009electro-optic Fabry-Perot spectroscopyThe spectroscopic analysis of interference patterns using an electronic imaging tube with a Fabry-Perot interferometer to record the fringes.EDU.photonics.com 9/8/2009hyperspectral imagingMethods for identifying and mapping materials through spectroscopic remote sensing. Also called imaging spectroscopy; ultraspectral imaging.EDU.photonics.com 9/8/2009MEDIACompact MEMS-FPI Sensor for Portable NIR SpectrometersHamamatsu’s MEMS-FPI spectrum sensors utilize a built-in MEMS Fabry-Perot interferometer and InGaAs PIN photodiode to measure NIR spectra. With their high sensitivity to NIR wavelengths and their...Photonics.com 4/28/2020Photonics on the Showroom Floor and in the Lab - LIGHT MATTERS 02.2018On this month's episode of Light Matters, we take you on a brief tour of the Higgins Laboratories at Worcester Polytechnic Institute (WPI). Quinsigamond Community College and WPI received a $4M grant...Photonics.com 2/21/2018Light Matters Extra: Lightning Awards Luminate Rochester - 11/2017In this month's Light Matters Extra, we give you an in-depth look at the recent Luminate Lightning Awards. New York’s Lieutenant Governor Kathy Hochul was there and tells us why Luminate is important...Photonics.com 11/17/2017Optics and Photonics at the Hub of the Industry - LIGHT MATTERS 10.2017Tune into this month's edition of Light Matters for some of the highlights from Optifab 2017, as distributors and buyers from all over the world met in the photonics industry hub of Rochester, New...Photonics.com 10/26/2017PHOTONICS BUYERS' GUIDE CATEGORIESPhoton Imaging DetectorsLinear ArraysA linear array is a solid-state video detector consisting of a single row of light-sensitive semiconductor devices, used in linear-array cameras.Photomultiplier Tube DetectorsFTIR SpectrometersCOMPANIESOZ Optics LimitedEstablished in 1985, OZ Optics is a leading worldwide supplier of fiber optic components, test equipment and sensors. OZ Optics manufactures its products in three locations, Ottawa (Canada),...Photonics Buyers' GuideLaCroix Precision OpticsOptics that Defend, Build, Cure and Discover The LaCroix name is synonymous with quality precision optics. Since 1947, three generations of family leadership have placed LaCroix Precision Optics...Photonics Buyers' GuideReynard CorporationReynard Corporation has been a premier supplier of custom optics and thin-film coatings to a global customer base since 1984. Reynard focuses on manufacturing the highest quality products with...Photonics Buyers' GuideCascade Optical CorporationCascade Optical Corporation has more than 35 years of expertise in custom vacuum-deposited thin-film coatings, specializing in IAD, low temp, low stress coatings for laser crystals and fiber optics....Photonics Buyers' Guide