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Proceedings Paper

Ring-Field IR Sensor For Space Surveillance
Author(s): W. S. Hinds; W. B. Birtley
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Paper Abstract

A novel scanning sensor concept has been designed and evaluated for missile surveillance from an orbiting satellite. This concept, called a ring-field sensor, is capable of providing fast frame rates, excellent spatial resolution, and high radiometric sensitivity with relatively small optics. The scan implementation utilizes a continuously nutating, optically flat mirror in object space which exhibits very low momentum exchange with the spacecraft. Ring-field scanning combines most of the advantages of a spinning line array and a linear scanning line array for broad band systems without their major disadvantages. Furthermore, it is uniquely suited to predetection filtering over a wide field of view for background suppression. Incorporation of a Fabry-Perot etalon in the optics, for example, will result in improvement in signal to background noise but, more importantly, will provide suppression of the structured background by a factor of two or more. This performance improvement does not require a large number of detectors. The ring-field sensor concept is described, and the results of signal to noise enhancement estimates using the Fabry-Perot etalon are presented. Target and background spectra are included to indicate the basis for the estimates of sensor performance.

Paper Details

Date Published: 15 November 1976
PDF: 10 pages
Proc. SPIE 0095, Modern Utilization of Infrared Technology II, (15 November 1976); doi: 10.1117/12.955170
Show Author Affiliations
W. S. Hinds, Rockwell International (United States)
W. B. Birtley, Rockwell International (United States)

Published in SPIE Proceedings Vol. 0095:
Modern Utilization of Infrared Technology II
Irving J. Spiro, Editor(s)

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