Curved detectors developments and characterization: application to astronomical instruments

Simona Lombardo; Thibault Behaghel; Bertrand Chambion; Wilfried Jahn; Emmanuel Hugot; Eduard Muslimov; Melanie Roulet; Marc Ferrari; Christophe Gaschet; Stéphane Caplet; David Henry

doi:10.1117/12.2312654

20 July 2018 Curved detectors developments and characterization: application to astronomical instruments

Simona Lombardo, Thibault Behaghel, Bertrand Chambion, Wilfried Jahn, Emmanuel Hugot, Eduard Muslimov, Melanie Roulet, Marc Ferrari, Christophe Gaschet, Stéphane Caplet, David Henry

Author Affiliations +

Proceedings Volume 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII; 107090U (2018) https://doi.org/10.1117/12.2312654
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

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 R_c =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.

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Simona Lombardo, Thibault Behaghel, Bertrand Chambion, Wilfried Jahn, Emmanuel Hugot, Eduard Muslimov, Melanie Roulet, Marc Ferrari, Christophe Gaschet, Stéphane Caplet, and David Henry "Curved detectors developments and characterization: application to astronomical instruments", Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 107090U (20 July 2018); https://doi.org/10.1117/12.2312654

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