Convenient method for calibrating nonlinear phase modulators for use in phase shifting interferometry

Noe Alcala Ochoa; Jonathan Mark Huntley

doi:10.1117/1.602025

1 September 1998 Convenient method for calibrating nonlinear phase modulators for use in phase shifting interferometry

Noe Alcala Ochoa, Jonathan Mark Huntley

Optical Engineering, Vol. 37, Issue 9, (September 1998). https://doi.org/10.1117/1.602025

A method to calibrate a nonlinear phase modulator is described that is based on the minimization of a function obtained from a sequence of interferometric images. The method is equally applicable to smooth wavefront and speckled wavefront interferometry, allowing convenient in situ calibration for a wide range of interferometer configurations. The main advantage over previous calibration methods is that both the linear and quadratic phase variation terms are measured. The performance of the proposed method is verified by experiments in which the phase shift is determined independently by a Fourier transform method.

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Noe Alcala Ochoa and Jonathan Mark Huntley "Convenient method for calibrating nonlinear phase modulators for use in phase shifting interferometry," Optical Engineering 37(9), (1 September 1998). https://doi.org/10.1117/1.602025

Published: 1 September 1998

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