Computer Science – Performance
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1309...42f&link_type=abstract
IN: Infrared imaging systems: Design, analysis, modeling, and testing; Proceedings of the Meeting, Orlando, FL, Apr. 16-18, 1990
Computer Science
Performance
Infrared Imagery, Infrared Radiometers, Modulation Transfer Function, Image Analysis, Indium Antimonides, Infrared Detectors, Systems Engineering
Scientific paper
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.
Confer Charles
Fraedrich Douglas S.
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