28 August 2010 Adaptive optics for small satellite remote sensing system using LCOS-SLM as a phase diversity generator
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Abstract
The purpose of this paper is to develop adaptive optics system which estimates degrading factors using observed images and automatically compensates the distorted wavefronts using a spatial light modulator (SLM). The system estimates optical wavefront aberrations by phase diversity method. The SLM which is used for wavefront compensation applies multiple time-series known wavefronts as a priori information to the optical system. By using the SLM for the phase diversity generator, it is possible to select the optimal number and shape of phase diversities for various kinds of natural modes of wavefront aberrations which are represented by the Zernike polynomials. In laboratory test, wavefront aberrations were generated by optical misalignments, and they were estimated as the coefficients of Zernike polynomials for an extended scene. The suggested method was validated by numerical simulations and laboratory tests. The high estimation accuracy of the distorted wavefront was demonstrated, and nearly diffraction limited images were acquired by wavefront compensation.
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Norihide Miyamura, "Adaptive optics for small satellite remote sensing system using LCOS-SLM as a phase diversity generator", Proc. SPIE 7818, Adaptive Coded Aperture Imaging, Non-Imaging, and Unconventional Imaging Sensor Systems II, 78180P (28 August 2010); doi: 10.1117/12.859653; https://doi.org/10.1117/12.859653
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KEYWORDS
Wavefronts

Wavefront aberrations

Zernike polynomials

Adaptive optics

Spatial light modulators

CMOS cameras

Numerical simulations

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