MTF and PSF measurements of the CCD273-84 detector for the Euclid visible channel

I. Swindells; R. Wheeler; S. Darby; S. Bowring; D. Burt; R. Bell; L. Duvet; D. Walton; R. Cole

doi:10.1117/12.2053005

28 August 2014 MTF and PSF measurements of the CCD273-84 detector for the Euclid visible channel

I. Swindells, R. Wheeler, S. Darby, S. Bowring, D. Burt, R. Bell, L. Duvet, D. Walton, R. Cole

Proceedings Volume 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave; 91432V (2014) https://doi.org/10.1117/12.2053005
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The European Space Agency (ESA) and e2v, together with the Euclid Imaging Consortium, have designed and manufactured pre-development models of a novel imaging detector for the visible channel of the Euclid space telescope. The new detector is an e2v back-illuminated, 4k x 4k, 12 micron square pixel CCD designated CCD273-84. The backilluminated detectors have been characterised for many critical performance parameters such as read noise, charge transfer efficiency, quantum efficiency, Modulation Transfer Function and Point Spread Function. Initial analysis of the MTF and PSF performance of the detectors has been performed by e2v and at MSSL and the results have enabled the Euclid VIS CCD project to move in to the C/D or flight phase delivery contract. This paper describes the CCD273-84 detector, the test method used for MTF measurements at e2v and the test method used for PSF measurements at MSSL. Results are presented for MTF measurements at e2v over all pre development devices. Also presented is a cross comparison of the data from the MTF and PSF measurement techniques on the same device. Good agreement between the measured PSF Full Width Half Maximum and the equivalent Full Width Half Maximum derived from the MTF images and test results is shown, with results that indicate diffusion FWHM values at or below 10 micron for the CCD273-84 detectors over the spectral range measured. At longer wavelengths the diffusion FWHM is shown to be in the 6-8 micron range.

Citation Download Citation

I. Swindells, R. Wheeler, S. Darby, S. Bowring, D. Burt, R. Bell, L. Duvet, D. Walton, and R. Cole "MTF and PSF measurements of the CCD273-84 detector for the Euclid visible channel", Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91432V (28 August 2014); https://doi.org/10.1117/12.2053005

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