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13 October 2010 Sub-pixel registration method for phase diversity wavefront sensor using spatial light modulator
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The purpose of this paper is to develop sub-pixel registration method for adaptive optics system using phase diversity wavefront sensing with a spatial light modulator (SLM). 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 this case, a misregistration of several diversity images has to be compensated before using phase diversity algorithm. We extracted phase diversity method to estimate not only wavefront aberration but also parallel shift between images simultaneously. The suggested method was validated by numerical simulations, and the high estimation accuracy of the distorted wavefront was demonstrated, and nearly diffraction limited images were acquired by wavefront compensation by preventing noise due to misregistrations.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Norihide Miyamura "Sub-pixel registration method for phase diversity wavefront sensor using spatial light modulator", Proc. SPIE 7826, Sensors, Systems, and Next-Generation Satellites XIV, 78262J (13 October 2010);

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