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10 articles
Photonics Handbook
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Diffraction Gratings: Selection Guidelines
David Ventola, Optometrics Corp., an Omega Optical Holdings company
Diffraction gratings are optical components with a periodic structure that separate light into beams traveling in predictable directions based on their wavelength. The grating acts as the dispersive...
Scatter and BSDF Measurements: Theory and Practice
Richard Pfisterer, Photon Engineering LLC
Except for direct illumination from the sun, laser, or other light source, everything we see or detect is ultimately scattered light. Light can be scattered or rescattered during its propagation to...
Polarization-Based Imaging: Basics and Benefits
XING-FEI HE, TELEDYNE DALSA
There are three fundamental properties of light: intensity, wavelength, and polarization. Almost all cameras today are designed for monochrome or color imaging. A monochrome camera is used to measure...
Measuring Small-Beam MFD: Overcoming the Challenges
DERRICK PETERMAN, PhD, MKS Ophir
Profiling beams under 10 µm in size is one of the more challenging beam profiling applications. There are numerous reasons for this, including the very small size. Focal plane arrays commonly...
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...
Infrared System Design: Understanding the Process
William L. Wolfe, Professor Emeritus, University of Arizona, Optical Sciences Center
Infrared system design is not, like some circuit design, a synthetic process. One cannot start by stating the problem and proceeding in an orderly fashion to a final solution. Rather, we guess a...
Polygonal Laser Scanners: Fitting the Elements to the Task
Glenn E. Stutz, Lincoln Laser Co.
Reading and writing systems for polygonal scanners differ in the use of the scanner. However, many performance characteristics are similar for both. In writing applications, a light source, usually a...
Optical Objective Systems: A Schematic Guide
Warren J. Smith, Rockwell Collins Optronics
Simple Meniscus Lens The simple meniscus lens is almost universally used in inexpensive cameras. To get an image of good quality it must be used with a separate aperture stop, reducing the...
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,...
Spectrum Analysis for DWDM: New Instruments Meet the Challenge
Francis Audet, EXFO
As system and cable installers try to optimize their links, the preferred method has become high-speed DWDM. This demand for bandwidth has led to the development of new test and measurement...
Photonics Handbook
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