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Proceedings Paper

ESPI vibration fringe enhancement by laser diode wavelength modulation
Author(s): Yaotang Li; Ichirou Yamaguchi; Jun-ichi Kato
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Paper Abstract

A novel technique for enhancing the time-average ESPI vibration fringes is presented in this paper. The technique is based on the use of wavelength modulation of a laser diode which is adopted in the interferometer as a coherent laser source. The wavelength modulation of the laser diode gives rise to both the additional phase shift and the speckle decorrelation by which the time-average ESPI vibration fringe quality is improved.

Paper Details

Date Published: 1 January 1992
PDF: 10 pages
Proc. SPIE 1553, Laser Interferometry IV: Computer-Aided Interferometry, (1 January 1992); doi: 10.1117/12.135300
Show Author Affiliations
Yaotang Li, Guangzhou Institute of Electronic Technology (China)
Ichirou Yamaguchi, RIKEN--Institute of Physical and Chemical Research (Japan)
Jun-ichi Kato, RIKEN--Institute of Physical and Chemical Research (Japan)

Published in SPIE Proceedings Vol. 1553:
Laser Interferometry IV: Computer-Aided Interferometry
Ryszard J. Pryputniewicz, Editor(s)

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