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Proceedings Paper

A kind of Shack-Hartmann wavefront sensor with extremely large number of subapertures for adaptive optics system of extremely large telescope
Author(s): Ang Zhang; Changhui Rao; Xuejun Zhang; Zhou Liao; Kai Wei; Yudong Zhang; Wenhan Jiang
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Paper Abstract

A kind of Multiple-Detecting-Branch (MDB) Shack-Hartmann wavefront sensor (SHWFS) with extremely large number of subapertures, in which the pupil is split into spatially several branches by a beam splitter and each branch is detected by a SHWFS with less subapertures comparatively, is proposed to use for the wavefront sensing of the adaptive optics system for extremely large telescope. All the signals from the CCDs of SHWFS must be synchronized by the specially developed hardware system. There are the angular error of the beam splitter and the circum-optical-axis rotary of CCDs besides of the error of the conventional SHWFS. In this paper, the principle of the MDB SHWFS is introduced and its errors are analyzed. The simulation and experimental results show that this kind of MDB SHWFS can be used to measure effectively the wavefront aberration of the total pupil.

Paper Details

Date Published: 16 July 2008
PDF: 9 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70154Z (16 July 2008); doi: 10.1117/12.788348
Show Author Affiliations
Ang Zhang, Institute of Optics and Electronics (China)
Changhui Rao, Institute of Optics and Electronics (China)
Xuejun Zhang, Institute of Optics and Electronics (China)
Zhou Liao, Institute of Optics and Electronics (China)
Kai Wei, Institute of Optics and Electronics (China)
Graduate School, Chinese Academy of Sciences (China)
Yudong Zhang, Institute of Optics and Electronics (China)
Wenhan Jiang, Institute of Optics and Electronics (China)


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

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