Point-spread function and photon transfer of a CCD for space-based astronomy

Allanwood, Edgar A. H.; Murray, Neil J.; Stefanov, Konstantin D.; Burt, David J. and Holland, Andrew D. (2013). Point-spread function and photon transfer of a CCD for space-based astronomy. In: UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VI, SPIE, article no. 8860-18.

DOI: https://doi.org/10.1117/12.2024263

Abstract

A front-illuminated development Euclid charge-coupled device (CCD) is tested to observe the CCD point-spread function (PSF) relative to signal size using a single-pixel photon transfer curve (SP-PTC) technique. In the process of generating a SP-PTC charge redistribution effects were observed. In attempting to show that charge redistribution can be caused by exposing a charge-populated well in the CCD array to further illumination, excess charge became apparent in recorded data. Excess charge is suggested to be proportionally generated in the CCD array if existing charge is subjected to further illumination before transfer and readout. The construction of an optical test bench and CCD operating variables are discussed alongside systematic error concerns and mitigation techniques.

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