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Adaptive Wavefront Control using a Nonlinear Zernike Filter

Justh, Eric W.; Vorontsov, Mikhail A.; Carhart, Gary W.; Beresnev, Leonid A.; Krishnaprasad, Perinkulam S. (2001)

A conventional Zernike filter measures wavefront phase by superimposing the aberrated input beam with a phase-shifted version of its zero-orderspectral component. The Fourier-domain phase-shifting is performed by afixed ...

Advanced Phase-Contrast Techniques for Wavefront Sensing and Adaptive Optics

Vorontsov, Mikhail A.; Justh, Eric W.; Beresnev, Leonid A. (2001)

High-resolution phase-contrast wavefront sensors based on optically addressed phase spatial light modulators and micro-mirror/LC arrays areintroduced. Wavefront sensor efficiency is analyzed for atmosphericturbulence-induced ...

Nonlinear Analysis of a High-Resolution Optical Wave-Front Control System

Justh, Eric W.; Krishnaprasad, Perinkulam S.; Vorontsov, M.A. (2001)

A class of feedback systems for high-resolution optical wave-front control(or adaptive optic wave-front distortion suppression) is modeled andanalyzed. Under certain conditions, the nonlinear dynamical system modelsobtained ...

Opto-Electronic Zernike Filter for High-Resolution Wavefront Analysis using a Phase-Only Liquid Crystal Spatial Light Modulator

Carhart, Gary W.; Vorontsov, M.A.; Justh, Eric W. (2001)

An opto-electronic technique for high-resolution wave-front phase imagingis presented and demonstrated experimentally. The technique is analogousto the conventional Zernike phase-contrast approach, but uses modernspatial ...