Error propagation in curvature sensors

Details Error propagation in curvature sensors Error propagation in curvature sensors

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7736e.175k&link_type=abstract

Adaptive Optics Systems II. Edited by Ellerbroek, Brent L.; Hart, Michael; Hubin, Norbert; Wizinowich, Peter L. Proceedings o

Physics

Optics

Scientific paper

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.

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