Paper
1 September 1992 Models of nonlinearities in focal plane arrays
Author Affiliations +
Abstract
Focal plane applications demand a high degree of linearity in the detector response function (voltage out vs. photon flux in). For calibrating radiometric data and for correcting channel-to- channel nonuniformities in nonradiometric data, the response function of the focal plane must be correctable to within 0.1%. This specification requires either significant improvement in focal plane technologies or in methods to correct for it. Two-point calibration is often used to correct for nonuniformities across a focal plane array (FPA), as well as for calibration. Because the input-output curves of FPA channels are nonlinear, two-point calibration produces a systematic calibration error as a function of flux, and the channel-to-channel variations of this calibration error leave a significant post-correction nonuniformity. A simple physical model of the detector nonlinearity is used to illustrate these points. The sensor degradation due to nonlinearities is predicted from the pixel-to-pixel variations in nonlinearity after two-point correction. Variations of only 0.2% can result in significant degradations of the array D*.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James P. Karins "Models of nonlinearities in focal plane arrays", Proc. SPIE 1685, Infrared Detectors and Focal Plane Arrays II, (1 September 1992); https://doi.org/10.1117/12.137785
Lens.org Logo
CITATIONS
Cited by 5 scholarly publications.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Sensors

Calibration

Staring arrays

Dielectrics

Infrared sensors

Quantum efficiency

Absorption

RELATED CONTENT


Back to Top