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Adaptive Optical System Technologies II
The NAOS adaptive optics system was installed in December 2001 on the Nasmyth focus of the ESO VLT. It includes two wavefront sensors: one is working at IR wavelengths, the other at visible wavelengths. This paper describes the NAOS Visible Wave Front Sensor based on a Shack-Hartmann principle. This wavefront sensor unit includes: 1) a continuous flow liquid nitrogen cryostat and a low noise fast readout CCD camera controlled by the ESO new generation CCD system FIERA using a fast frame ratedoi:10.1117/12.458945 fatcat:ktc7v2tljzhjlkxgqo6nxz7fki