Accession Number : ADD014584

Title :   Multi-Color Coincident Infrared Detector Background of the Invention.

Descriptive Note : Patent Application, Filed 4 May 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Chu, Tak-Kin

Report Date : 04 May 1990

Pagination or Media Count : 6

Abstract : This invention relates generally to radiation sensing detectors and more particularly to detectors producing plural electrical outputs in response to impinging radiation at distinctly different wavelengths. The use of epitaxial semiconductors as infrared detectors in a multi-color imaging system, is generally well known. In such prior detector arrangements, photovoltages are developed across separate junctions respectively formed on the semiconductors having different bandgaps and on which separate optically active surfaces are established in order to achieve multi-color operation. Since each junction responds to only a spatial portion of the incident optical input, there is a loss of signal content. Further, when such detectors are arranged in an array configuration signal loss is especially severe because of non-coincident radiation focussed on separate areas at different times. Keywords: Patent applications. (JES)

Descriptors :   *INFRARED DETECTORS, *PATENT APPLICATIONS, ARRAYS, BACKGROUND RADIATION, COLORS, CONFIGURATIONS, DETECTION, DETECTORS, EPITAXIAL GROWTH, IMAGES, INFRARED RADIATION, INPUT, LOSSES, OPERATION, OPTICS, RADIATION, SEMICONDUCTORS, SIGNALS

Subject Categories : Miscellaneous Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE