Using Photodetectors in Shack-Hartmann Wavefront Sensors
L. V. Antoshkin, V. V. Lavrinov, L. N. Lavrinova, V. P. Lukin
Zuev Institute of Atmospheric Optics, Siberian Branch of Russian Academy of Sciences
lvv@iao.ru
Keywords: centroid coordinates, photodetector, intensity distribution
Pages: 44-51
Abstract
High-resolution cameras are used as photodetectors in the image recording plane of a Shack-Hartmann wavefront sensor to record centroid coordinates which provide basic information for wavefront reconstruction. A comparative analysis is made of the accuracy of determining the centroid coordinates for CCD and CMOS cameras. The modes of instantaneous sampling and frame-by-frame accumulation of information from the cameras are considered.
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