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15 July 2008 A CMOS camera for pyramid wavefront sensors
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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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kuldip N. Modha, Ian M. Stockford, Ibolya Kepiro, Carl Paterson, Roger A. Light, Matt Clark, Mark Pitter, and Barrie Hayes-Gill "A CMOS camera for pyramid wavefront sensors", Proc. SPIE 7015, Adaptive Optics Systems, 70155R (15 July 2008); https://doi.org/10.1117/12.803827
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