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Detectors: Options for Low-Light Applications
SLAWOMIR PIATEK AND EARL HERGERT, HAMAMATSU CORPORATION

Developed in the early 1990s, the silicon photomultiplier (SiPM) is a solid-state photodetector whose sensitivity to light rivals that of a photomultiplier tube (PMT) in a regime where a few hundred...

Thin-Film Coatings: A Buyers' Guide
Trey Turner and Roger Kirschner, Research Electro-Optics Inc. (REO)

What are thin-film coatings? The purpose of any optical thin-film coating is to modify the transmittance and reflectance properties of the substrate material to which they are applied. Most coatings...

Digital Still Cameras: The Changing Face of Imaging
Morio Onoe, Professor Emeritus, University of Tokyo

The digital camera represents an integration of optics, mechanics and electronics consisting of three layers (Figures 1a, b and c). The top and the middle layers are printed circuit boards (PCBs),...

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...

Detectors: The Charge Injection Alternative
Tony Chapman, Thermo Fisher Scientific Inc., CIDTEC Cameras & Imagers

Charged-injection device imagers are metal-oxide semiconductor (MOS) detectors that can be fabricated using PMOS, NMOS and CMOS integrated circuit technology, and may be configured as a...

Particle Image Velocimetry: Basics, Developments and Techniques
M. Kelnberger, InnoLas GmbH; G. Schwitzgebel, Universität Mainz

Particle image velocimetry (PIV) is an experimental tool in fluid mechanics and aerodynamics. The basic principle involves photographic recording of the motion of microscopic particles that follow...

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