Nonlinear time dependence of dark current in charge-coupled devices

Justin C. Dunlap; Erik Bodegom; Ralf Widenhorn

doi:10.1117/12.871962

16 February 2011 Nonlinear time dependence of dark current in charge-coupled devices

Justin C. Dunlap, Erik Bodegom, Ralf Widenhorn

Proceedings Volume 7875, Sensors, Cameras, and Systems for Industrial, Scientific, and Consumer Applications XII; 78750H (2011) https://doi.org/10.1117/12.871962
Event: IS&T/SPIE Electronic Imaging, 2011, San Francisco Airport, California, United States

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.

Citation Download Citation

Justin C. Dunlap, Erik Bodegom, and Ralf Widenhorn "Nonlinear time dependence of dark current in charge-coupled devices", Proc. SPIE 7875, Sensors, Cameras, and Systems for Industrial, Scientific, and Consumer Applications XII, 78750H (16 February 2011); https://doi.org/10.1117/12.871962

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