Performance improvement of an IR imaging system using subsystem MTF analysis

Douglas S. Fraedrich; Charles L. Confer

doi:10.1117/12.21757

1 October 1990 Performance improvement of an IR imaging system using subsystem MTF analysis

Douglas S. Fraedrich, Charles L. Confer

Proceedings Volume 1309, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing; (1990) https://doi.org/10.1117/12.21757
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

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.

Citation Download Citation

Douglas S. Fraedrich and Charles L. Confer "Performance improvement of an IR imaging system using subsystem MTF analysis", Proc. SPIE 1309, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing, (1 October 1990); https://doi.org/10.1117/12.21757

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