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MORE TEST & MEASUREMENTTEST & MEASUREMENT FEATURES
A Closer Look at Resolution Testing Feb 4, 2019 — A Closer Look at Resolution Testing From reverse projection to modulation transfer function testing, there is more than one way to evaluate the resolution of a lens. Patrick McKenna, edmund optics inc. Images courtesy of Edmund Optics Inc. 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 uncommon
Vision Spectra, Apr 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...
Industrial Photonics, Jul 2018
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...
Industrial Photonics, Jan 2018
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...
Industrial Photonics, Jan 2018
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...
Industrial Photonics, Apr 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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Prism Awards: The Oscars of the Industry Nov 30, 2016 — The industry is primed and ready for Photonics West 2017. It’s a time for networking, sharing products and research, and learning. It’s a time to recognize the world’s top innovators, as well. This largest conference and expo in...
Photonics Spectra, Jan 2017
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 rubbed with a fingertip. Common expressions include “shiny,” “lusterless and rough,” “like oxidized silver” or “like a mirror.” The differences indicated by...
Photonics Spectra, Feb 2016
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...
Industrial Photonics, Oct 2015
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...
Industrial Photonics, Oct 2015
Choosing a Machine Vision System — Making the Right Selection Oct 8, 2015 — Picture an industrial process designer confronted with a problem that only vision-based technology can solve. The first decision that the designer would need to make is whether to choose an application-specific device or a general-purpose device....
Industrial Photonics, Oct 2015
Aspheric Lenses: Optimizing the Design Sep 1, 2015 — This second of two articles discusses the tools optical designers need to tailor their designs to the appropriate manufacturing process, optimizing the cost of component fabrication.
Photonics Spectra, Sep 2015
CCD Sensors Remain Competitive with Broadening Appeal Jun 26, 2015 — CCDs continue to be the sensor of choice for applications such as astronomy and spectroscopy. With future investment, we can expect improvements in sensor architecture, resolution, pixel size and depth, as well as readout speeds. Over the last few...
Photonics Spectra, Jul 2015
Laser World of Photonics Jun 15, 2015 — Laser Munich will focus on image processing, from products and systems to manufacturing and applications. Image processing and laser systems are ever-present in modern manufacturing. The 2015 Laser World of Photonics conference and trade fair,...
EuroPhotonics, Jun 2015
Improved Photometric Testing for High-Power LEDs Apr 24, 2015 — The LM-85 approved method for electrical photometric measurement of high-power LEDs harmonizes the methods currently in use and addresses measurement consistency issues. This is the first in a two-part series. The standardized photometric testing...
Photonics Spectra, May 2015
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