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Proceedings Paper

Performance improvement of an IR imaging system using subsystem MTF analysis
Author(s): Douglas S. Fraedrich; Charles L. Confer
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Paper Abstract

Performance improvement of a dual-band (3-5-micron and 8-12-micron) imaging radiometer is considered. The results of optical and subsystem modulation transfer function (MTF) analyses indicate that primary performance limitations include severe chromatic aberration in the 3-5-micron (SW) channel and the combination of slow SW detector time constant and poorly tuned high-frequency boost circuit. A new SW detector lens and telescope objective pair have been designed to reduce the chromatic aberration. An improved boost circuit provides MTF with the same noise-equivalent bandwidth. An InSb detector/preamp hybrid is being investigated for a possible replacement of the low-bandwidth HgCdTePC detector currently being used.

Paper Details

Date Published: 1 October 1990
PDF: 11 pages
Proc. SPIE 1309, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing, (1 October 1990); doi: 10.1117/12.21757
Show Author Affiliations
Douglas S. Fraedrich, Naval Research Lab. (United States)
Charles L. Confer, Thermetrix Inc. (United States)

Published in SPIE Proceedings Vol. 1309:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing

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