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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 ...