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18 articles
Photonics Handbook
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Fluorescence Lifetime Imaging: Choosing the Best Approach
GERHARD HOLST, Excelitas PCO GmbH
The term fluorescence is often applied as a synonym for photoluminescence, although luminescence actually covers fluorescence and phosphorescence. Both of these terms describe the process of...
Measuring Surface Roughness: The Benefits of Laser Confocal Microscopy
ROBERT BELLINGER, Evident
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...
Nanopositioning: A Step Ahead
Scott Jordan, Brian Lula, and Stefan Vorndran, PI (Physik Instrumente) LP
By its original definition, a nanopositioning device is a mechanism capable of repeatedly delivering motion in increments as small as one nanometer. Lately demands from industry and research have...
Laser Measurement Systems: Best Practices
JOHN MCCAULEY, MKS Ophir
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...
Lasers for Microscopy: Major Trends
Marco Arrigoni, Nigel Gallaher, Darryl McCoy, Volker Pfeufer, Matthias Schulze, and Daniel Callen, Coherent Inc.
Laser development for the microscopy market continues to be driven by key trends in applications, which currently include superresolution techniques, multiphoton applications in optogenetics and...
Diode-Pumped Lasers: Performance, Reliability Enhance Applications
Arnd Krueger and Scott White, MKS/Spectra-Physics
Neodymium-doped crystals and glasses such as Nd:YAG (neodymium:yttrium aluminum garnet) have long been used as laser gain materials. Optically pumped, they produce an output wavelength close to 1...
Plastic Optics: Specifying Injection-Molded Polymer Optics
William S. Beich, GS PLASTIC OPTICS
The use of precision polymer optics is becoming an increasing necessity today as products demand sophisticated light handling components to achieve desired results. Polymer optics can be thought of...
Lasers: Understanding the Basics
Coherent Inc.
Over 60 years have passed since the first demonstration of a laser in 1960. After the initial spark of interest, lasers were for a while categorized as “a solution waiting for a problem,”...
Vibration Control: Limiting Mechanical Noise
MKS/Newport
In general, there are three common approaches to reducing mechanical excitation of photonic systems. The first is identifying the sources of vibration and implementing ways to eliminate or reduce...
Broadband Spectrophotometry: A Fast, Simple, Accurate Tool
Iris Bloomer, n&k Technology, Inc.; Rebecca Mirsky, Al Shugart International
Designing devices that incorporate ultrathin films is an important means of enhancing yields. However, characterizing ultrathin films provides a challenge for mainstream metrology tools such as...
Beryllium Mirrors: Refinements Enable New Applications
Vladimir Vudler and Peter Richard, Hardric Laboratories, Inc.
With a specific gravity of 1.85 g/cm3, beryllium is the lightest metal that is workable. It is 45 percent lighter than aluminum and approximately five times as stiff. Its stiffness to weight ratio...
Infrared Spectral Selection: It Begins with the Detector
Austin Richards, FLIR Systems, Commercial Vision Systems
Spectral selection is a powerful tool that enhances conventional imaging tremendously. Most imaging systems, including the human eye, are designed to image light over a broad range of the spectrum....
Spectroscopy: The Tools of the Trade
Dr. John R. Gilchrist, Clyde HSI
All optical spectrometry techniques rely on the measurement of radiant power. The configuration of the instrument varies based on the measurement technique: absorption, emission, luminescence, or...
Diamond Machining: Ultraprecision Machine Technology
Engineering Staff, AMETEK Precitech, Inc.
Ultraprecision machining can be defined in general terms as the removal of material from a substrate utilizing a machine tool that operates at a resolution of 10 nm (0.4 μin.) or less. The...
Nano-Optics Technology: Optical Alchemy
Hubert Kostal, NanoOpto Corp.
Optics today needs alchemy, and the forces that motivate microchip technology are a key reason why. Today, light can transmit and process digital information as well as electricity can — in...
Laser Scanning Systems: Optimizing Performance
Yuhong Huang and Eric Ulmer, General Scanning
To obtain optimal performance from a laser scanning system, the system integrator must carefully weigh the effects of each component and consider how best to implement hardware and software to...
Beam Diagnostics: Meeting the Need for High Quality
Coherent, Inc.
For any discussion of laser beam diagnostics, it is first necessary to define some terms that characterize beam properties. Broad definitions can include measurements of laser energy or power,...
NSOM: Discovering New Worlds
M. Kovar, Midako A. Nohe, N.O. Petersen and P.R. Norton, University of Western Ontario
NSOM is suitable for studies on the mesoscopic scale (several tens to hundreds of molecular dimensions). It has become an important tool in research and applications of semiconductors, organic layers...
Photonics Handbook
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