The effect of intensity noise on the computed phase of phase-shifting interferometry is investigated. Using a simple Taylor expansion, one can easily show the sensitivity of the error in computed phase to frame-to-frame intensity noise correlation. The sensitivity of various algorithms to statistically independent intensity noise and intensity quantization noise is considered. Intensity-error cross correlations are found to increase the error in computed phase for the case of intensity quantization error.
© 1990 Optical Society of America
Original Manuscript: May 5, 1989
Manuscript Accepted: November 17, 1989
Published: April 1, 1990
Chris P. Brophy, "Effect of intensity error correlation on the computed phase of phase-shifting interferometry," J. Opt. Soc. Am. A 7, 537-541 (1990)