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Proceedings Paper

Automated harmonic vibration studies with twin-pulsed
Author(s): Andrew J. Moore
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Paper Abstract

Addition fringes are obtained in real time from Electronic Speckle Pattern Interferometry (ESPI) using a twin-pulsed laser, when two pulses are fired during a single frame of a CCD camera. However, the fringe patterns have poor visibility, because optical noise is reinforced. Automatic phase extraction from addition fringes has not previously been achieved: low-pass filtering to suppress random speckle noise also eliminates the fringes due to their low visibility. Two procedures to calculate phase from ESPI addition fringes are presented in this paper. This has enabled phase to be extracted from ESPI addition fringes for the first time.

Paper Details

Date Published: 23 July 1993
PDF: 2 pages
Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1983CG (23 July 1993); doi: 10.1117/12.2308867
Show Author Affiliations
Andrew J. Moore, Ctr. de Investigaciones en Optica A.C. (Mexico)


Published in SPIE Proceedings Vol. 1983:
16th Congress of the International Commission for Optics: Optics as a Key to High Technology
Gyorgy Akos; Tivadar Lippenyi; Gabor Lupkovics; Andras Podmaniczky, Editor(s)

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