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Proceedings Paper

A CMOS camera for pyramid wavefront sensors
Author(s): Kuldip N. Modha; Ian M. Stockford; Ibolya Kepiro; Carl Paterson; Roger A. Light; Matt Clark; Mark Pitter; Barrie Hayes-Gill
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Paper Abstract

A CMOS camera for a pyramid wavefront sensor (PWS) based adaptive optics system (AOS) is proposed in this paper. The designed camera has four 32 x 32 active reset pixel arrays with a common addressing to produce synchronous analogue outputs. The custom CMOS sensor has a layout area of 12.6 sq. mm, has a pixel fill factor of 56% and was fabricated using Austria Micro Systems 0.35 &mgr;m C35B4 CMOS process. The sensor consumes about 56 mW of power during the readout. The camera chip is enclosed in a box of dimensions 6 cm x 5.5 cm x 5 cm, which makes it suitable for use in an optical system. A high speed camera reading system has been developed that can read up to 1000 frames/second. The camera exhibits a quantum efficiency of 0.24 and the estimated minimum detectable flux is 8.69 nW/mm2 on the surface of the sensor. The complete camera system detects the four pupil images produced by the PWS and can be used in the AOS.

Paper Details

Date Published: 15 July 2008
PDF: 9 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70155R (15 July 2008); doi: 10.1117/12.803827
Show Author Affiliations
Kuldip N. Modha, Univ. of Nottingham (United Kingdom)
Ian M. Stockford, Univ. of Nottingham (United Kingdom)
Ibolya Kepiro, Imperial College London (United Kingdom)
Carl Paterson, Imperial College London (United Kingdom)
Roger A. Light, Univ. of Nottingham (United Kingdom)
Matt Clark, Univ. of Nottingham (United Kingdom)
Mark Pitter, Univ. of Nottingham (United Kingdom)
Barrie Hayes-Gill, Univ. of Nottingham (United Kingdom)

Published in SPIE Proceedings Vol. 7015:
Adaptive Optics Systems
Norbert Hubin; Claire E. Max; Peter L. Wizinowich, Editor(s)

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