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Proceedings Paper

Nonlinear time dependence of dark current in charge-coupled devices
Author(s): Justin C. Dunlap; Erik Bodegom; Ralf Widenhorn
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Paper Abstract

It is generally assumed that charge-coupled device (CCD) imagers produce a linear response of dark current versus exposure time except near saturation. We found a large number of pixels with nonlinear dark current response to exposure time to be present in two scientific CCD imagers. These pixels are found to exhibit distinguishable behavior with other analogous pixels and therefore can be characterized in groupings. Data from two Kodak CCD sensors are presented for exposure times from a few seconds up to two hours. Linear behavior is traditionally taken for granted when carrying out dark current correction and as a result, pixels with nonlinear behavior will be corrected inaccurately.

Paper Details

Date Published: 16 February 2011
PDF: 10 pages
Proc. SPIE 7875, Sensors, Cameras, and Systems for Industrial, Scientific, and Consumer Applications XII, 78750H (16 February 2011); doi: 10.1117/12.871962
Show Author Affiliations
Justin C. Dunlap, Portland State Univ. (United States)
Erik Bodegom, Portland State Univ. (United States)
Ralf Widenhorn, Portland State Univ. (United States)


Published in SPIE Proceedings Vol. 7875:
Sensors, Cameras, and Systems for Industrial, Scientific, and Consumer Applications XII
Ralf Widenhorn; Valérie Nguyen, Editor(s)

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