Full-field time-dependent heterodyne interferometer for shape measurement: theory and experiment

Tomasz S. Tkaczyk; Romulad Jozwicki

doi:10.1117/12.417218

12 February 2001 Full-field time-dependent heterodyne interferometer for shape measurement: theory and experiment

Tomasz S. Tkaczyk, Romulad Jozwicki

Author Affiliations +

Proceedings Volume 4190, Optomechatronic Systems; (2001) https://doi.org/10.1117/12.417218
Event: Intelligent Systems and Smart Manufacturing, 2000, Boston, MA, United States

Abstract

12 Heterodyne interferometry is a powerful tool for shape measurement. However, to the present day there are only a few papers devoted to full field, time dependent heterodyne interferometry. Most of known solutions are based on the point measurement, and the shape is obtained by scanning in the examined area. In this paper a full field heterodyne system using the fringe projection principle and fast framing DALSA CA-D1 CCD camera is proposed and discussed. Due to frequency shift between interfering beams the interference pattern is traveling over the object surface and allows heterodyne registration. The use of a fast camera is a certain approximation of classical heterodyning.

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Tomasz S. Tkaczyk and Romulad Jozwicki "Full-field time-dependent heterodyne interferometer for shape measurement: theory and experiment", Proc. SPIE 4190, Optomechatronic Systems, (12 February 2001); https://doi.org/10.1117/12.417218

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