Tech Briefs

Photonics & Imaging

Access our comprehensive library of technical briefs on photonics and imaging, from engineering experts at NASA and major government, university, and commercial laboratories.

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Briefs: Photonics/Optics
Pulse shepherding is a nonlinear signal-propagation phenomenon that can occur when several pulses of light at different wavelengths are launched simultaneously or nearly simultaneously along the same...
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Briefs: Software
Software for Scheduling Use of Shared Resources
The Quick Utility for Intelligence Planning and Scheduling (QUIPS) computer program automates the scheduling of resources that must be shared among multiple tasks or groups. Designed to aid coordination of military intelligence operations at the division and brigade levels, QUIPS might also prove...
Briefs: Software
Software for Processing SAR Images of the Polar Oceans
The RADARSAT/ERS-1,2 Geophysical Processor System (RGPS) is an automated system of hardware and software that processes synthetic-aperture-radar (SAR) images of ice and open water in polar oceans to generate higher-level geophysical-data products. Information in such products includes the age...
Briefs: Photonics/Optics
Program for Analysis of a Complex Optomechanical System
The IMOS computer program contains subprograms that, collectively, provide a unique capability for multidisciplinary analysis of a system represented by a combination of mathematical models of structural (mechanical), control, thermal, and optical characteristics. One example of such a system...
Briefs: Photonics/Optics
Thermal Lens Spectrometer Yields High Sensitivity
Thermal lens spectrometry is a highly sensitive method for detecting very small quantities of material by the absorption of light from a laser source. It takes advantage of the thermal lens effect to measure the absorption spectrum of a sample. This invention utilizes an optical parametric...
Briefs: Electronics & Computers
Cross-diffraction gratings have been proposed to provide optical coupling to quantum-well infrared photodetectors (QWIPs) in focal-plane arrays (FPAs). The cross-grating coupling scheme is...
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Briefs: Electronics & Computers
Laser Doppler velocimetry (LDV) systems have been used for a number of years in field and laboratory applications. The normal LDV system consists of a two-color, four-beam...
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