Briefs: Photonics/Optics
Hand-Held Optoelectronic Particulate Monitors

Optoelectronic instruments are being developed for use in measuring the concentrations and sizes of microscopic particles suspended in air. The instruments could be used, for example, to detect...

Briefs: Photonics/Optics
High-Performance Processor of Hyperspectral Images

The Remote Sensing Hyperspectral Engine (RSHE) is a special-purpose, portable computer that performs high-performance processing of hyperspectral image data collected by a remote-sensing...

Briefs: Photonics/Optics
Lateral-Current-Collection HgCdTe Infrared Detectors

Arrays of HgCdTe infrared photodetectors have been developed to satisfy stringent performance requirements for use in NASA’s Tropospheric Emission Spectrometer. The design of these detectors...

Briefs: Photonics/Optics
Portable Airborne Multispectral-Imaging System

A portable instrumentation system that includes an airborne and a ground-based subsystem acquires multispectral image data over swaths of terrain ranging in width from about 1/2 to 1 km. The...

Briefs: Electronics & Computers
Lossless Image-Compression Algorithm Implemented in an FPGA

A lossless image-compression algorithm that can be executed entirely in electronic hardware has been developed. This algorithm yields about 15 percent more compression than does the...

Briefs: Photonics/Optics
Hardware and Software for Air-to-Air Schlieren Imaging

Software and electronic hardware are being developed to provide cockpit guidance and camera control for an air-to-air schlieren photography system that is to be used to take high-resolution...

Briefs: Photonics/Optics
Fractal-Based Encryption

In 1987 a discovery led to the formal proof that it is possible to use chaotic functions to arrive at a nonprobabilistic and nondeterministic method normal context of the operation of this system, and by using a virtual...

Briefs: Photonics/Optics
Camera Images Hydrogen Fires in Three Wavelength Bands

A special-purpose multispectral video camera has been designed to provide an enhanced capability for viewing hydrogen fires. Hydrogen fires do not emit sufficient visible light to be seen by...

Briefs: Photonics/Optics
Video-Based Foreign Object Detection

The Boeing Company has developed an overhead camera system that can automatically spot small pieces of debris on a work surface that might otherwise go unnoticed. The system automatically analyzes inputs from...

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