Real-time and unambiguous visualization of a surface profile using an all-optical feedback interferometer

Tomohiro Shirai; Thomas H. Barnes; T. G. Haskel

doi:10.1117/12.354720

19 July 1999 Real-time and unambiguous visualization of a surface profile using an all-optical feedback interferometer

Tomohiro Shirai, Thomas H. Barnes, T. G. Haskel

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.354720
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

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.

Citation Download Citation

Tomohiro Shirai, Thomas H. Barnes, and T. G. Haskel "Real-time and unambiguous visualization of a surface profile using an all-optical feedback interferometer", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.354720

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