Lu, Y., Doel, A.P., Walker, D.D. and Zhao, X. (2003) Dynamic measurement of displacement with a phase-shifting technique. Optical Engineering, 42. pp. 2006-2009. ISSN 0091-3286

A simple spatial phase-shifting setup that uses a tiled mirror and a cat’s-eye retroreflector is presented. It can be used in displacement measurement when high speed and accuracy are required. An experiment is carried out to demonstrate the feasibility of the method. A root mean square (rms) accuracy of better than 5 deg is obtained in ordinary circumstance. The system errors are also studied briefly.

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