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Optical Engineering

Charge-coupled devices: frame adding as an alternative to long integration times and cooling
Author(s): Mark J. O'Malley; Eon O'Mongain
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Paper Abstract

CCDs used for low light level applications require a long integration time and/or cooling to have acceptable SNR. Standard commercially available CCD cameras (e.g., for TV applications) are used with a relatively short integration time (≈1/60 s per field) and are operated at room temperature. Consequently, these cameras will have poor SNR if used for low light level applications. The addition of successive frames from a standard CCD camera for the improvement of the SNR is considered here. We show, using a simple model, that a range of signal levels (as low as a few millilux) exists for which frame addition is a viable alternative to long integration times and cooling.

Paper Details

Date Published: 1 March 1992
PDF: 5 pages
Opt. Eng. 31(3) doi: 10.1117/12.56091
Published in: Optical Engineering Volume 31, Issue 3
Show Author Affiliations
Mark J. O'Malley, University College, Dublin (Ireland)
Eon O'Mongain, Univ. College Dublin (Ireland)

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