26 July 1993 Narrow band width interference filter with photorefractive LiNbO3
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Proceedings Volume 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology; 19836B (1993) https://doi.org/10.1117/12.2308646
Event: 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1993, Budapest, Hungary
Abstract
A simple method is demonstrated to introduce phase shifts into holographic interferometry in such a way that no calibration of the phase shifter is required, and measurements are insensitive to the nonlinearity and drift of the phase shifter as well as to mechanical and/or thermal instabilities of the optical setup. Using a double-exposure, two-reference beam setup, we both introduce and measure the phase shifts a posteriori, in reconstructing a hologram. The phase shifts are monitored using a built-in Michelson interferometer, a trigger signal to activate the interferogram pick-up being generated as soon as the phase shift reaches the value predetermined by the algorithm employed in interferogram evaluation. Application of this technique combined with an advanced interferogram evaluation program to nondestructive testing of bioprosthetic heart valves is presented.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rene Muller, Rene Muller, } "Narrow band width interference filter with photorefractive LiNbO3", Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 19836B (26 July 1993); doi: 10.1117/12.2308646; https://doi.org/10.1117/12.2308646
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