Multi-Color Coincident Infrared Detector Background of the Invention.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 04, 1990
- Accession Number
- ADD014584
Entities
People
- Tak-kin Chu
Organizations
- United States Department of the Navy