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Proceedings Paper

Extrapolation method to extend the dynamic range of the Shack-Hartmann wave-front sensor
Author(s): Huaqiang Li; Helun Song; Xuejun Rao; Changhui Rao; Jinsheng Yang
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Paper Abstract

The maximum tolerable spot displacement of the Shack-Hartmann wave-front sensor is called dynamic range, and it is limited by the f-number of the micro-lens. It is well known that there is a trade-off between the sensitivity and the dynamic range, if the f-number is relatively short, a high dynamic range is achieved, but the corresponding sensitivity is degraded and vice versa. Extrapolation method could overcome the trade-off; since the extrapolation method is a simple algorithm that does not change the measurement configuration, there is no requirement for extra hardware, multiple measurements, or complicated algorithms. In this paper, we not only present the theory but also actually implement measurement of a highly aerated wave-front.

Paper Details

Date Published: 28 November 2007
PDF: 8 pages
Proc. SPIE 6834, Optical Design and Testing III, 68341Z (28 November 2007); doi: 10.1117/12.755016
Show Author Affiliations
Huaqiang Li, Institute of Optics and Electronics (China)
Graduate School of Chinese Academy of Sciences (China)
Helun Song, Institute of Optics and Electronics (China)
Graduate School of Chinese Academy of Sciences (China)
Xuejun Rao, Institute of Optics and Electronics (China)
Changhui Rao, Institute of Optics and Electronics (China)
Jinsheng Yang, Institute of Optics and Electronics (China)


Published in SPIE Proceedings Vol. 6834:
Optical Design and Testing III
Yongtian Wang; Theo T. Tschudi; Jannick P. Rolland; Kimio Tatsuno, Editor(s)

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