Normalized detectivity as a function of diffusion length for SPRITE detectors

Per Fredin; Glenn D. Boreman

doi:10.1117/12.154710

31 August 1993 Normalized detectivity as a function of diffusion length for SPRITE detectors

Per Fredin, Glenn D. Boreman

Proceedings Volume 1969, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV; (1993) https://doi.org/10.1117/12.154710
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

This paper suggests a method for normalization of D* for SPRITE detectors with respect to MTF-limiting parameters, primarily the diffusion spread. The purpose of the normalization is to obtain a single performance parameter for the SPRITE detector to make it more objectively comparable with conventional detectors with discrete elements. The recalculation ratio is the rms noise calculated with a filter that compensates the impulse response back to a square pulse divided by the rms noise of the SPRITE element with no compensating filters. In this paper two filters are used: one that fully compensates back to a square impulse response, and one that compensates the MTF at two selected frequencies. The recalculation ratio is calculated as a function of diffusion length with the ratio element length/(carrier life time* scan speed) (L/vt) as a parameter. The results show very little variation with L/vt, so the results should be valid for most applications for the SPRITE detector.

Citation Download Citation

Per Fredin and Glenn D. Boreman "Normalized detectivity as a function of diffusion length for SPRITE detectors", Proc. SPIE 1969, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV, (31 August 1993); https://doi.org/10.1117/12.154710

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