Hybrid wave front sensor for partially coherent beacons

Jeff Richey; Michael Hart

doi:10.1117/12.2560079

13 December 2020 Hybrid wave front sensor for partially coherent beacons

Jeff Richey, Michael Hart

Proceedings Volume 11448, Adaptive Optics Systems VII; 114485X (2020) https://doi.org/10.1117/12.2560079
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Wavefront sensor (WFS) design typically focuses on reference sources at the two extremes of spatial coherence: –spatially coherent natural guide stars (NGS) and spatially incoherent laser guide stars (LGS). We propose a hybrid WFS architecture for sources that fall between those two extremes such as might be achieved with an uplink corrected LGS source. This architecture uses a lenslet array to segment the pupil plane, but the subaperture size is based on the coherence area of the reference source, and a separate WFS technique behind each lenslet is used to achieve the desired spatial sampling of the wavefront. The initial concept presented here is a hybrid Shack-Hartmann Pyramid WFS, though the concept can be applied to other WFS techniques.

Citation Download Citation

Jeff Richey and Michael Hart "Hybrid wave front sensor for partially coherent beacons", Proc. SPIE 11448, Adaptive Optics Systems VII, 114485X (13 December 2020); https://doi.org/10.1117/12.2560079

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