A study on a fast measuring technique of wavefront using a Shack–Hartmann sensor

The measuring resolution and speed for wavefront are important to improve the performance of an adaptive optics system. In this paper, we propose a fast measuring technique with high resolution in the Shack–Hartmann wavefront sensor. The proposed measuring technique of wavefront combines the convent...

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Bibliographic Details
Published in:Optics and laser technology 2002-11, Vol.34 (8), p.687-694
Main Authors: Park, Seung-Kyu, Baik, Sung-Hoon, Kim, Cheol-Jung, Ra, Sung Woong
Format: Article
Language:English
Subjects:
Atmospheric optics
Estimated weighting factor
Exact sciences and technology
Fast measurement of wavefront
Fundamental areas of phenomenology (including applications)
Geometrical optics
Optics
Physics
Remote sensing
lidar and adaptive systems
Shack–Hartmann sensor
Wave fronts and ray tracing
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Summary:The measuring resolution and speed for wavefront are important to improve the performance of an adaptive optics system. In this paper, we propose a fast measuring technique with high resolution in the Shack–Hartmann wavefront sensor. The proposed measuring technique of wavefront combines the conventional center of mass algorithm with an estimated weighting factor. The estimated weighting factor is a real value anticipating the real center of mass in a wavefront spot image. This estimated weighting factor can be calculated at the initialization step of an adaptive optics system. We designed a robust adaptive optics system with this proposed measuring algorithm. The measuring accuracy and speed are investigated by using the proposed algorithm compared with the conventional center of mass algorithm in experiments.
ISSN:0030-3992
1879-2545
DOI:10.1016/S0030-3992(02)00100-7