Abstract

The effect of a uniform measurement bias, due to background light, stray light, detector dark current, or detector offset, on phase retrieval wavefront sensing algorithms is analyzed. Simulation results indicate that the root-mean-square error of the retrieved phase can be more sensitive to an unaccounted-for signal bias than to random noise in practical scenarios. Three methods for reducing the impact of signal bias are presented.

© 2009 Optical Society of America

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History
Original Manuscript: September 17, 2008
Manuscript Accepted: January 27, 2009
Published: March 25, 2009

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Author Affiliations

Samuel T. Thurman, James R. Fienup

University of Rochester

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