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Proceedings Paper

Quadrilinear CCD sensors for the multispectral channel of spaceborne imagers
Author(s): Alex Materne; Bruno Gili; David Laubier; Thierry Gimenez
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Paper Abstract

The PLEIADES-HR Earth Observation satellites will combine a high resolution panchromatic channel -- 0.7 m at nadir -- and a multispectral channel allowing a 2.8 m resolution. This paper presents the main specifications, design and performances of a 52 microns pitch quadrilinear CCD sensor developed by ATMEL under CNES contract, for the multispectral channel of the PLEIADES-HR instrument. The monolithic CCD device includes four lines of 1500 pixels, each line dedicated to a narrow spectral band within blue to near infra red spectrum. The design of the photodiodes and CCD registers, with larger size than those developed up to now for CNES spaceborne imagers, needed some specific structures to break the large equipotential areas where charge do not flow properly. Results are presented on the options which were experimented to improve sensitivity, maintain transfer efficiency and reduce power dissipation. The four spectral bands are achieved by four stripe filters made by SAGEM-REOSC PRODUCTS on a glass substrate, to be assembled on the sensor window. Line to line spacing on the silicon die takes into account the results of straylight analysis. A mineral layer, with high optical absorption performances is deposited between photosensitive lines to further reduce straylight.

Paper Details

Date Published: 12 December 2001
PDF: 9 pages
Proc. SPIE 4540, Sensors, Systems, and Next-Generation Satellites V, (12 December 2001); doi: 10.1117/12.450673
Show Author Affiliations
Alex Materne, Ctr. National d'Etudes Spatiales (France)
Bruno Gili, ATMEL-Grenoble (France)
David Laubier, Ctr. National d'Etudes Spatiales (France)
Thierry Gimenez, Ctr. National d'Etudes Spatiales (France)

Published in SPIE Proceedings Vol. 4540:
Sensors, Systems, and Next-Generation Satellites V
Hiroyuki Fujisada; Joan B. Lurie; Konradin Weber; Joan B. Lurie; Konradin Weber, Editor(s)

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