Error propagation in curvature sensors

Aglaé Kellerer; Mark Chun; Christ Ftaclas

doi:10.1117/12.856641

28 July 2010 Error propagation in curvature sensors

Aglaé Kellerer, Mark Chun, Christ Ftaclas

Proceedings Volume 7736, Adaptive Optics Systems II; 773658 (2010) https://doi.org/10.1117/12.856641
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The effect of measurement noise on the phase reconstruction is here analyzed for curvature sensors. It is shown, that for a fixed extra-focal distance the phase variance depends only on the number of photons and is independent of the number of sensing elements. The error propagation factor is further computed for three different sampling geometries: square and hexagonal grids and the polar geometry commonly used for curvature sensors. The error propagation factor is seen to be almost independent of the grid geometry.

Citation Download Citation

Aglaé Kellerer, Mark Chun, and Christ Ftaclas "Error propagation in curvature sensors", Proc. SPIE 7736, Adaptive Optics Systems II, 773658 (28 July 2010); https://doi.org/10.1117/12.856641

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