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30 June 1998 Analyses of light diffracted on rough surfaces to measure in-plane displacements using a heterodyne interferometer
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Abstract
Measurements of in-plane displacements of rough surfaces show strong influence of the sample structure on the registered signal. Rapid signal amplitude changes as function of sample position for various illumination angles introduce certain indeterminacy and can decrease the accuracy of the measurement system. To find measurements limits the experimental study of the flight diffracted on rough surfaces was performed. Experimental set-up with various illumination systems was built. To compensate environment influences the reference signal was applied. The notion of the probability of the heterodyne signal was introduced and determined for various illumination angles and surface treatments. A modification of heterodyne interferometry system for in-plane displacement measurements was proposed and discussed.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tomasz S. Tkaczyk "Analyses of light diffracted on rough surfaces to measure in-plane displacements using a heterodyne interferometer", Proc. SPIE 3478, Laser Interferometry IX: Techniques and Analysis, (30 June 1998); https://doi.org/10.1117/12.312942
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