Photoelastic microellipsometer: a new tool for high-resolution force vector measurements

Wolfgang Holzapfel; Ulrich Neuschaefer-Rube; Stephan Neuschaefer-Rube

doi:10.1117/12.246212

16 August 1996 Photoelastic microellipsometer: a new tool for high-resolution force vector measurements

Wolfgang Holzapfel, Ulrich Neuschaefer-Rube, Stephan Neuschaefer-Rube

Proceedings Volume 2873, International Symposium on Polarization Analysis and Applications to Device Technology; (1996) https://doi.org/10.1117/12.246212
Event: International Symposium on Polarization Analysis and Applications to Device Technology, 1996, Yokohama, Japan

Abstract

We are reporting about a novel ellipsometric measurement procedure which enables us to detect forces and force- related sizes at high resolution by use of the laserinternal photoelastic effect. The measurement procedure is based on the intracavity transmission ellipsometry developed by us. Relative retardation (Delta) and orientation of the main axis p of the component under test can be concluded from the polarization state and from the beat frequency of the orthogonally polarized modes of an active laser. Our measurements of weight forces show a very good linearity in a measurement range of seven decades. The Nd:YAG-laser technology enables us to develop very small sensors at high accuracy.

Citation Download Citation

Wolfgang Holzapfel, Ulrich Neuschaefer-Rube, and Stephan Neuschaefer-Rube "Photoelastic microellipsometer: a new tool for high-resolution force vector measurements", Proc. SPIE 2873, International Symposium on Polarization Analysis and Applications to Device Technology, (16 August 1996); https://doi.org/10.1117/12.246212

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