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Effect of intensity error correlation on the computed phase of phase-shifting interferometry

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Abstract

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

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