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/mm<sup>2</sup> 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.