Extrapolation method to extend the dynamic range of the Shack-Hartmann wave-front sensor

Huaqiang Li; Helun Song; Xuejun Rao; Changhui Rao; Jinsheng Yang

doi:10.1117/12.755016

28 November 2007 Extrapolation method to extend the dynamic range of the Shack-Hartmann wave-front sensor

Huaqiang Li, Helun Song, Xuejun Rao, Changhui Rao, Jinsheng Yang

Proceedings Volume 6834, Optical Design and Testing III; 68341Z (2007) https://doi.org/10.1117/12.755016
Event: Photonics Asia 2007, 2007, Beijing, China

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.

Citation Download Citation

Huaqiang Li, Helun Song, Xuejun Rao, Changhui Rao, and Jinsheng Yang "Extrapolation method to extend the dynamic range of the Shack-Hartmann wave-front sensor", Proc. SPIE 6834, Optical Design and Testing III, 68341Z (28 November 2007); https://doi.org/10.1117/12.755016

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