Automated harmonic vibration studies with twin-pulsed

Andrew J. Moore

doi:10.1117/12.2308867

23 July 1993 Automated harmonic vibration studies with twin-pulsed

Andrew J. Moore

Proceedings Volume 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology; 1983CG (1993) https://doi.org/10.1117/12.2308867
Event: 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1993, Budapest, Hungary

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.

Citation Download Citation

Andrew J. Moore "Automated harmonic vibration studies with twin-pulsed", Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1983CG (23 July 1993); https://doi.org/10.1117/12.2308867

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