An alternative to the conventional linear phase shift in optical testing interferometers is a sinusoidal phase shift, whichhas the benefit of relaxing requirements on the phase-shifting mechanism. We propose error-compensating phase-demodulation algorithms and provide a new, comprehensive sensitivity analyses to random noise, nonlinearity,vibrations and calibration error to demonstrate that sinusoidal phase shifting can be as robust and computationallyefficient as the more established linear phase-shift techniques.
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