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Proceedings Paper

Real-time and unambiguous visualization of a surface profile using an all-optical feedback interferometer
Author(s): Tomohiro Shirai; Thomas H. Barnes; T. G. Haskel
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Paper Abstract

A novel feedback interferometer, which consists of a polarization Sagnac interferometer and an optically- addressed phase-only spatial light modulator, is described for real-time and unambiguous visualization of the surface profile. In this system, the output intensity from the Sagnac interferometer is optically fed back to the phase modulator placed in one arm of the interferometer to produce a sawtooth fringe intensity profile which is directly and unambiguously related to the surface profile. Experimental results demonstrate the feasibility of applying this system to surface profile measurement.

Paper Details

Date Published: 19 July 1999
PDF: 2 pages
Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); doi: 10.1117/12.354720
Show Author Affiliations
Tomohiro Shirai, Mechanical Engineering Lab. (Japan)
Thomas H. Barnes, Univ. of Auckland (New Zealand)
T. G. Haskel, Industrial Research Ltd. (New Zealand)

Published in SPIE Proceedings Vol. 3749:
18th Congress of the International Commission for Optics

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