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Proceedings Paper

Actively phase-compensated portable fiber optic electronic speckle pattern interferometer (ESPI) for long-term in-situ measurements
Author(s): Alexander Brozeit; Klaus D. Hinsch
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Paper Abstract

The design and performance of an actively phase-compensated fiber-optic speckle pattern interferometer (ESPI) is presented. Due to its portability, illuminating beam flexibility and lightweight design it provides an alternative to standard bulk-optics FSPI systems for many applications. Phase stabilization allows for long-term measurements up to several days. In addition, the provided phase stepping uses the four-step algorithm, is self calibrating, and can be performed at quasi video rate. The use of all highly birefringent fiber-optics components ensures linearly polarized light for the illuminating beams under all operating conditions.

Paper Details

Date Published: 17 July 1996
PDF: 6 pages
Proc. SPIE 2860, Laser Interferometry VIII: Techniques and Analysis, (17 July 1996); doi: 10.1117/12.276300
Show Author Affiliations
Alexander Brozeit, Carl von Ossietzky Univ. (Germany)
Klaus D. Hinsch, Carl von Ossietzky Univ. (Germany)

Published in SPIE Proceedings Vol. 2860:
Laser Interferometry VIII: Techniques and Analysis
Malgorzata Kujawinska; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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