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Proceedings Paper

Curved detectors developments and characterization: application to astronomical instruments
Author(s): Simona Lombardo; Thibault Behaghel; Bertrand Chambion; Wilfried Jahn; Emmanuel Hugot; Eduard Muslimov; Melanie Roulet; Marc Ferrari; Christophe Gaschet; Stéphane Caplet; David Henry
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Paper Abstract

Many astronomical optical systems have the disadvantage of generating curved focal planes requiring flattening optical elements to project the corrected image on at detectors. The use of these designs in combination with a classical at sensor implies an overall degradation of throughput and system performances to obtain the proper corrected image. With the recent development of curved sensor this can be avoided. This new technology has been gathering more and more attention from a very broad community, as the potential applications are multiple: from low-cost commercial to high impact scientific systems, to mass-market and on board cameras, defense and security, and astronomical community. We describe here the first concave curved CMOS detector developed within a collaboration between CNRS- LAM and CEA-LETI. This fully-functional detector 20 Mpix (CMOSIS CMV20000) has been curved down to a radius of Rc =150mm over a size of 24x32mm2. We present here the methodology adopted for its characterization and describe in detail all the results obtained. We also discuss the main components of noise, such as the readout noise, the fixed pattern noise and the dark current. Finally we provide a comparison with the at version of the same sensor in order to establish the impact of the curving process on the main characteristics of the sensor.

Paper Details

Date Published: 20 July 2018
PDF: 9 pages
Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 107090U (20 July 2018); doi: 10.1117/12.2312654
Show Author Affiliations
Simona Lombardo, Aix Marseille Univ., CNRS, CNES, LAM (France)
Thibault Behaghel, Aix Marseille Univ., CNRS, CNES, LAM (France)
Bertrand Chambion, Univ. Grenoble Alpes, CEA, LETI, MINATEC (France)
Wilfried Jahn, Caltech (United States)
Emmanuel Hugot, Aix Marseille Univ., CNRS, CNES, LAM (France)
Eduard Muslimov, Aix Marseille Univ., CNRS, CNES, LAM (France)
Melanie Roulet, Aix Marseille Univ., CNRS, CNES, LAM (France)
Marc Ferrari, Aix Marseille Univ., CNRS, CNES, LAM (France)
Christophe Gaschet, Univ. Grenoble Alpes, CEA, LETI, MINATEC (France)
Stéphane Caplet, Univ. Grenoble Alpes, CEA, LETI, MINATEC (France)
David Henry, Univ. Grenoble Alpes, CEA, LETI, MINATEC (France)


Published in SPIE Proceedings Vol. 10709:
High Energy, Optical, and Infrared Detectors for Astronomy VIII
Andrew D. Holland; James Beletic, Editor(s)

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