A simple and efficient model for polychromatic focal plane wave-front sensor

Details A simple and efficient model for polychromatic focal plane wave-front sensor A simple and efficient model for polychromatic focal plane wave-front sensor

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7736e..76d&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

Phase Diversity is a focal-plane technique which is chromatic by nature. The use of a monochromatic model on wide-band imaging results of an additional error function of the spectral range.We present here a second order modeling of the focal plane wave-front sensing error due to wide-band imaging and propose a first order correction by inverse problem and the first results of an end-to-end simulation for an iterative correction. Simulation results of 20 nm wave-front aberrations show that the reconstruction error decreases from 10 nm with classical focal-plane sensor to sub-nanometric error with optimal correction at Δλ = 500 nm.

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