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Optical Engineering

Compensation For Gain Nonuniformity And Nonlinearity In Hgcdte Infrared Charge-Coupled-Device Focal Planes
Author(s): Glenn D. Boreman; Christopher Costanzo
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Paper Abstract

Infrared CCD arrays generally require a compensation for the effect of gain and offset variation among the individual detectors of the array. Linear compensation techniques do not suffice for focal planes that exhibit a large nonlinearity of response combined with order-of-magnitude variations in threshold and saturation flux levels. This situation is common among hybrid architecture CCDs, particularly when HgCdTe is the detector material. This paper reports on a multipoint piecewise-linear correction scheme employed on a HgCdTe infrared CCD focal plane. This technique allows a compensated response to be obtained in a computationally efficient manner. An experimental relationship between the number of calibration points and the amount of residual fixed-pattern noise is presented and compared to previous analytical models.

Paper Details

Date Published: 1 October 1987
PDF: 4 pages
Opt. Eng. 26(10) 261081 doi: 10.1117/12.7974184
Published in: Optical Engineering Volume 26, Issue 10
Show Author Affiliations
Glenn D. Boreman, University of Central Florida (United States)
Christopher Costanzo, U.S. Army Night Vision and Electro-Optics Laboratory (United States)

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