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Optical Engineering

Adaptive optical image compensation experiments on stellar objects
Author(s): Wenhan Jiang; Mingquan Li; Guomao Tang; Ning Ling; Mei Li; Dengfeng Zheng
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Paper Abstract

The resolution of a large telescope is limited by various kinds of dynamic wavefront disturbance such as atmospheric turbulence. This has been a problem since the invention of the telescope. An approach for solving the problem is provided by adaptive optical techniques. Compensating for stellar objects in real time is, however, very difficult, because only limited light energy can be used and the temporal-spatial characteristics of dynamic disturbances place very high demands on system specifications. This paper reports the first experiment of a 21-element adaptive optical system for stellar objects on the Yunnan Observatory 1.2-m telescope and presents the improvements of the system for low-light-level stellar objects. The experimental results show that the adaptive optical system can work satisfactorily when the photon counts are as low as 93 per subaperture per integrating time. The experiments show that the effects of adaptive optics in reducing the divergence and wandering of the image spot, in improving resolution, and in increasing image contrast are significant.

Paper Details

Date Published: 1 January 1995
PDF: 6 pages
Opt. Eng. 34(1) doi: 10.1117/12.184078
Published in: Optical Engineering Volume 34, Issue 1
Show Author Affiliations
Wenhan Jiang, Institute of Optics and Electronics (China)
Mingquan Li, Institute of Optics and Electronics (China)
Guomao Tang, Institute of Optics and Electronics (China)
Ning Ling, Institute of Optics & Electronics (China)
Mei Li, Institute of Optics and Electronics (China)
Dengfeng Zheng, Institute of Optics and Electronics (China)

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