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Proceedings Paper

61-element adaptive optical system for 1.2-m telescope of Yunnan Observatory
Author(s): Wenhan Jiang; Ning Ling; Guomao Tang; Mingquan Li; Feng Shen; Changhui Rao; Yaming Zhu; Bing Xu
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Paper Abstract

A 61-element adaptive optical system is being built for the 1.2m telescope of Yannan Observatory for astronomical observation in visible range. It consists of a 61-element deformable mirror, a fast steering mirror, a Hartmann-Shack wavefront sensor with 8 by 8 subapertures, a parallel digital processor and control electronics. The arrangement of subapertures is square matched with triable arrangement of actuators. The detector of H-S sensor is intensified CCD with frame rate of 838 Hz. The effective bandwidth is about 50 Hz for the DM control loop. A quadrant tracking detector consisting of 4 photon counting PMT detectors is used in the control loop of fast steering mirror. This system has been tested. The basic configuration and the preliminary results of the test are reported in this paper. This system will be integrated with a laser guide star system, in which a frequency doubling Nd:YAG pumped by laser diode array is used for producing a Rayleigh guide star. The pulse energy is 100 mJ with frequency of 838 Hz. A separated optics will be used to project the laser beam. The estimated specifications of this Rayleigh guide star system will be described in this paper too.

Paper Details

Date Published: 11 September 1998
PDF: 8 pages
Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); doi: 10.1117/12.321637
Show Author Affiliations
Wenhan Jiang, Institute of Optics and Electronics (China)
Ning Ling, Institute of Optics and Electronics (China)
Guomao Tang, Institute of Optics and Electronics (China)
Mingquan Li, Institute of Optics and Electronics (China)
Feng Shen, Institute of Optics and Electronics (China)
Changhui Rao, Institute of Optics and Electronics (China)
Yaming Zhu, Institute of Optics and Electronics (China)
Bing Xu, Institute of Optics and Electronics (China)

Published in SPIE Proceedings Vol. 3353:
Adaptive Optical System Technologies
Domenico Bonaccini; Robert K. Tyson, Editor(s)

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