13 September 2012 Holographic combination of low-resolution Shack-Hartmann sensor and holography-based modal Zernike wavefront sensor
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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.
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Shihao Dong, Shihao Dong, Tobias Haist, Tobias Haist, Wolfgang Osten, Wolfgang Osten, Thomas Ruppel, Thomas Ruppel, Oliver Sawodny, 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); doi: 10.1117/12.925899; https://doi.org/10.1117/12.925899
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