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Optical Engineering

Applications of a novel phase-shift method using a computer-controlled polarization mechanism
Author(s): Guan-chang Jin; Nai-Keng Bao; Po Sheun Chung
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Paper Abstract

A new computer-controlled phase-shifting apparatus based on polarization techniques is developed. This apparatus changes phase only by rotating a polarizer using a precise step motor and a specially designed decelerator. The precision of this method can be higher than other methods because of the accurate control of the rotating angle. Four applications of this technique to optical interlerometry and 3-D shape measurements are presented.

Paper Details

Date Published: 1 August 1994
PDF: 5 pages
Opt. Eng. 33(8) doi: 10.1117/12.173565
Published in: Optical Engineering Volume 33, Issue 8
Show Author Affiliations
Guan-chang Jin, Tsinghua Univ. (China)
Nai-Keng Bao, City Polytechnic of Hong Kong (Hong Kong)
Po Sheun Chung, City Polytechnic of Hong Kong (Hong Kong)


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