Holographic combination of low-resolution Shack-Hartmann sensor and holography-based modal Zernike wavefront sensor

Shihao Dong; Tobias Haist; Wolfgang Osten; Thomas Ruppel; Oliver Sawodny

doi:10.1117/12.925899

13 September 2012 Holographic combination of low-resolution Shack-Hartmann sensor and holography-based modal Zernike wavefront sensor

Shihao Dong, Tobias Haist, Wolfgang Osten, Thomas Ruppel, Oliver Sawodny

Author Affiliations +

Proceedings Volume 8447, Adaptive Optics Systems III; 84473Y (2012) https://doi.org/10.1117/12.925899
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The linearity and accuracy of holography-based modal wavefront sensing (HMWS) is reduced when large aberrations are present in the incoming wavefront. In this contribution, a combination of HMWS and a low-resolution Shack- Hartmann sensor (LRSHS) is introduced to extend the dynamic range of HMWS via a compact holographic design. The typically dominating low-order modes in the incoming wavefront are first corrected by the LRSHS. The system then switches to HMWS after one or two corrections to obtain better sensor sensitivity and accuracy. First experimental results are shown for validating the method.

Citation Download Citation

Shihao Dong, Tobias Haist, Wolfgang Osten, Thomas Ruppel, and Oliver Sawodny "Holographic combination of low-resolution Shack-Hartmann sensor and holography-based modal Zernike wavefront sensor", Proc. SPIE 8447, Adaptive Optics Systems III, 84473Y (13 September 2012); https://doi.org/10.1117/12.925899

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