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Proceedings Paper

Phase stepping and heterodyning in a fiber-based speckle shearing interferometer
Author(s): Jesus D. R. Valera; Julian D. C. Jones; David P. Towers; Clive H. Buckberry
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Paper Abstract

An optical, fiber-based, speckle shearing interferometer is described. The instrument uses a highly birefringent optical fiber to illuminate a test object with equal intensities of light guided by the orthogonal polarization eigenstates of the fiber. A Wollaston prism is used to obtain two sheared images with adjustable shear. Optical phase changes between the sheared images are readily achieved, without mechanical movement of components, by straining the optical fiber. Object strain determination, by fringe analysis with phase stepping techniques, is readily achieved. Vibration analysis by heterodyning is also reported.

Paper Details

Date Published: 14 June 1995
PDF: 9 pages
Proc. SPIE 2544, Interferometry VII: Techniques and Analysis, (14 June 1995); doi: 10.1117/12.211863
Show Author Affiliations
Jesus D. R. Valera, Heriot-Watt Univ. (United Kingdom)
Julian D. C. Jones, Heriot-Watt Univ. (United Kingdom)
David P. Towers, Rover Ltd. (United Kingdom)
Clive H. Buckberry, Rover Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 2544:
Interferometry VII: Techniques and Analysis
Malgorzata Kujawinska; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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