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11 articles
Photonics Handbook
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Optical System Optimization: Analyzing the Effects of Stray Light
Richard Pfisterer, Photon Engineering LLC
Electrical engineers are very familiar with the effects of shot noise, thermal noise, flicker noise and crosstalk, and recognize how these effects can reduce the signal-to-noise ratio (SNR) in their...
Silicon Photonics: Light Is the Ultimate Medium for High-Speed Communications
Christophe Kopp, Ségolène Olivier, and Stéphane Bernabé, CEA-LETI
Silicon photonics is widely considered a key enabling technology for further development of optical interconnect solutions needed to address growing traffic on the internet. From the first submarine...
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...
Optical Design Software: Fundamentals and Potential
Richard Pfisterer, Photon Engineering LLC
Optical design software allows the user to develop a configuration of optical elements that manipulate the trajectory of light for the purposes of creating an image, illuminating a target, coupling...
Detectors: Guideposts on the Road to Selection
Earl Hergert, Hamamatsu Corporation
Any number of medical, industrial, and analytical applications requires the detection of light. Chemiluminescence, bioluminescence, fluorescence, and atomic absorption are just a few, and all require...
Light-Emitting Diodes: A Primer
Opto Diode Corporation, An ITW company
The wavelength range of commercially available LEDs with single-element output power of at least 5 mW is 275 to 950 nm. Each wavelength range is made from a specific semiconductor material family,...
Ultraviolet Reflectance Imaging: Applications
Dr. Austin Richards, Oculus Photonics
Reflected-ultraviolet imaging is a rather mysterious area of the imaging field. There is relatively little actual UV imagery to be found on the Internet or in the literature compared to near-infrared...
Photometry: The Answer to How Light Is Perceived
Photo Research, Inc.
That portion of the spectrum that the eye can see — and its rainbow of colors — is rather small, covering approximately 360 to 830 nm. What colors we perceive depends on wavelength, while...
Hyperspectral Imaging Spectroscopy: A Look at Real-Life Applications
Dr. John R. Gilchrist, Clyde HSI; Timo Hyvärinen, Spectral Imaging Ltd.
Hyperspectral imaging spectroscopy has developed dramatically from a large, complex, remote-sensing satellite- or aircraft-based system into a rugged, compact, economically priced imaging and...
Lens Aberrations: Avoiding Defects in Imagery
Bruce H. Walker, Walker Associates
A lens collects light from a point on an object and focuses it to a corresponding conjugate point on an image. Under most conditions, the lens fails at this task because of some error in the...
Radiation Tolerances: Effects on CID Imaging Devices
Tony Chapman, Thermo Fisher Scientific, CIDTEC Cameras & Imagers
Like other CTDs, the CID imager uses hundreds of thousands (up to 4 million) pixel elements to capture optical images, and converts the light into an electronic charge which may be displayed on a...
Photonics Handbook
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