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

S. Dandy; J.-F. Sauvage; T. Fusco; L. Mugnier

doi:10.1117/12.857226

28 July 2010 A simple and efficient model for polychromatic focal plane wave-front sensor

S. Dandy, J.-F. Sauvage, T. Fusco, L. Mugnier

Proceedings Volume 7736, Adaptive Optics Systems II; 773629 (2010) https://doi.org/10.1117/12.857226
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

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.

Citation Download Citation

S. Dandy, J.-F. Sauvage, T. Fusco, and L. Mugnier "A simple and efficient model for polychromatic focal plane wave-front sensor", Proc. SPIE 7736, Adaptive Optics Systems II, 773629 (28 July 2010); https://doi.org/10.1117/12.857226

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