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1 January 1992 ESPI vibration fringe enhancement by laser diode wavelength modulation
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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.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yaotang Li, Ichirou Yamaguchi, and Jun-ichi Kato "ESPI vibration fringe enhancement by laser diode wavelength modulation", Proc. SPIE 1553, Laser Interferometry IV: Computer-Aided Interferometry, (1 January 1992); https://doi.org/10.1117/12.135300
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