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TEST & MEASUREMENT FEATURES
Growth in OLED Lighting Demands New Metrological Traceability
Dec 31, 2020 — The increasingly broad transition from incandescent light bulbs to OLEDs for general lighting poses new challenges to light measurement. OLEDs exhibit completely different and far greater variations in their spectral distribution. This variability does not support optimal measurements using established calibrations with standard illuminant A, due to different spectral sensitivities to errors in calibration and measurement. Metrological traceability and good control over measurement...
Photonics Spectra, Feb 2021
Achieving Improved Signal-to-Noise Ratio in Flow Cytometry
Jun 15, 2020 — Flow cytometry explores, analyzes, counts, and sorts small particles. With the increasing demands for higher data quality from researchers, clinicians, and manufacturers, component builders for these systems are being driven to increase the...
BioPhotonics, Aug 2020
Measuring High-Power Materials Processing Lasers with Camera-Based Beam Profilers
Jun 1, 2020 — From cutting steel to drilling via holes in silicon to marking plastic, a wide range of materials processes now use high-power lasers. Ever-growing demands for increased productivity and reduced waste require that the laser process be stable and...
Photonics Spectra, Jul 2020
For Carmakers, Inspection Flexibility Makes the Difference
Jul 11, 2019 — Building a car is a complex process, and it’s getting more complex every year. There are thousands of parts to inspect for quality and conformance to ever tighter specifications. What’s more, these parts must be tracked, and variations...
Vision Spectra, Sep 2019
LASER World of PHOTONICS 2019: An Innovation Playground
Apr 10, 2019 — With a first-rate portfolio, LASER World of PHOTONICS (Laser Munich) is a one-stop shop for research and technology, industry, and academia — showcasing numerous photonics components, systems, and applications. The biennial conference and...
BioPhotonics, Jun 2019
A Closer Look at Resolution Testing
Feb 4, 2019 — In the days of VGA video cameras and predominantly analog storage, it was easy to make an imaging lens that would outperform the camera’s ability to capture an image. That’s no longer the case. Where 640 pixels once stood, it is not...
Vision Spectra, Mar 2019
Designing Large Fizeau Interferometers
Jan 29, 2019 — Laser Fizeau interferometers are the workhorses of optical testing. With proper configurations and accessories, these instruments enable characterization of flats, prisms, concave and convex lenses, and even aspheric elements. While many laser...
Photonics Spectra, Mar 2019
Measuring NIR Sources for Safe and Accurate 3D Sensing
Jan 16, 2019 — 3D sensing with NIR wavelengths has taken off in the past several years, with use in such applications as facial and gesture recognition, eye tracking, and automotive vision systems such as lidar. The market for these optical sensing systems is...
Photonics Spectra, Mar 2019
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...
Vision-Spectra.com, Jun 2018
Scatter and BSDF Measurements: Theory and Practice
Feb 7, 2018 — Understanding the fundamental characteristics of scatter and the limitations imposed by scatterometers is essential to performing meaningful stray light calculations.
Photonics Handbook, Mar 2009
Innovations in Lens Measurement
Jan 29, 2018 — Automobile cameras, telescopes, head-mounted displays, laser-focusing heads and other modern photonic devices incorporate high-grade optics that can perform under extreme environmental conditions. The demand for such lenses means they must be...
Photonics Spectra, Mar 2018
Thermal Imaging Spurs New Applications
Dec 13, 2017 — Long-wave infrared (LWIR) imaging, also known as thermal imaging, has played a critical role in the defense and security market for decades because of its ability to detect warm (or live) objects independent of ambient lighting. Recently, advances...
Vision-Spectra.com, Dec 2017
Mastering Machine Vision
Dec 12, 2017 — As competition increases and customer requirements become more stringent, machine vision technology is becoming imperative for companies in manufacturing. Vision systems provide an automated and repeatable way of performing the quality control and...
Vision-Spectra.com, Dec 2017
Member Exclusive
Optical Techniques Tackle Nanoscale Measurements
Oct 31, 2017 — Materials at the nanoscale can behave in surprising ways. While the properties of macro materials can often be predicted, the behaviors of a material invisible to the naked eye can differ greatly. Providing insight into this nanospace is essential...
Photonics Spectra, Dec 2017
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Thickness Measurement Steps Up its Game
Feb 21, 2017 — Conducting accurate thickness measurements is essential for ensuring consistent quality of products such as plastic bottles and containers; however, measurement techniques are often invasive, destructive, time-consuming and wasteful. Unlike...
Photonics.com, Feb 2017
Member Exclusive
More Fiber Will Make Healthier Aerospace and Defense
Jan 18, 2017 — In military and aerospace applications, improving size, weight, power and cost (SWaP-C) is critical. That’s why electronics are being replaced by fiber optics. Fiber is lighter than copper and is immune to electromagnetic interference, a significant...
EuroPhotonics, Mar 2017
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Maximum Exposure: Ray-Tracing Software Optimizes Reflector Design
Aug 30, 2016 — The concentrated solar market is often overshadowed by photovoltaic (PV) panels, yet the market segment is expected to grow by nearly 20 percent annually through 2020. Concentrated solar power — or CSP — has unique performance advantages...
Photonics Spectra, Oct 2016
Measuring Aspheres: Selecting the Best Technique
Aug 1, 2016 — The benefits of aspheric lenses are numerous: They allow for a reduction in spherical aberrations and are ideal for focusing or collimating light, as they can achieve a low ƒ-number. Aspheres also allow the same or better performance using fewer...
Photonics Spectra, Sep 2016
When the Camera Is a Computer: Computational Life Sciences Imaging
Jun 21, 2016 — Sensors and cameras continue to progress, although life sciences imaging remains far from perfect. Even in its current state, barriers still exist. These include signal photon noise, light scattering, optical blur of finite aperture imaging systems...
BioPhotonics, Aug 2016
IR Sensor Calibration: When Extreme Uniformity Is Not Boring
Apr 27, 2016 — Extended area blackbodies are now commonly used as reference sources for IR cameras, simultaneously calibrated. The uniformity of the reference blackbody is therefore essential. A newly developed specific bench measures IR source uniformity with a...
EuroPhotonics, Jun 2016
Procedures Hinge on Nonlaser Light Sources’ Optimal Spatial Intensity Distribution
Apr 14, 2016 — Unsterilized medical products, dental restorations with incompletely cured restorative materials and adhesives that fail in their application are a few of the potential outcomes when light-based processes are poorly understood. Laser beam profiling...
BioPhotonics, Jun 2016
Measuring Surface Roughness: The Benefits of Laser Confocal Microscopy
Feb 10, 2016 — When evaluating the surface of a component, surface roughness can be assessed by eye or by rubbing it with a fingertip. Common expressions include “shiny,” “lusterless and rough,” “like oxidized silver,” or “like a mirror.” The differences indicated...
Photonics Handbook, Mar 2009
Measuring Small-Beam MFD: Overcoming the Challenges
Oct 28, 2015 — Small beams are used in many critical applications yet often they are not directly profiled. While obtaining good beam profiling data on beams under 10 µm has its challenges, they can be overcome with proven techniques.
Photonics Spectra, Nov 2015
Laser Measurement Systems: Best Practices
Oct 8, 2015 — Given the pace at which technology advances, there always seems to be a learning curve. With the abundance of consumer electronics available, there typically is no right or wrong way to use these devices — the choice usually comes down to the method...
Photonics Handbook, Mar 2009
3D Vision for Industrial Robots
Oct 8, 2015 — Industrial robots have existed for several decades, finding an initial foothold in the automotive sector. With tasks requiring high levels of repeatability, large payloads and moderate speeds, automotive plants were ideal for early industrial...
Vision-Spectra.com, Oct 2015
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FEATURES
Thermal Imaging Takes the Temperature of New Applications
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, Apr 2021
ASLMS 2021 Examines Laser-Based Treatments, Diagnosis in Online Setting
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