Vibration measurement by laser diode holographic interferometry

Yukihiro Ishii

doi:10.1117/12.248661

23 August 1996 Vibration measurement by laser diode holographic interferometry

Yukihiro Ishii

Proceedings Volume 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1996) https://doi.org/10.1117/12.248661
Event: Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1996, Ancona, Italy

Abstract

Laser-diode (LD) interferometry based on phase-shifting techniques has been applied to holographic interferometry for measuring the vibration amplitude and phase. First the developments including a phase-shifting interferometer with a frequency-modulated LD are reviewed. Second, stroboscopic holographic interferometry by a pulse-driven laser diode gives the measurement of the vibrating amplitude at any epoch. The frequency chirp of the laser-diode pulse used for real-time stroboscopic illumination cancels the Doppler frequency shift due to the motion of a sinusoidal vibrating object.

Citation Download Citation

Yukihiro Ishii "Vibration measurement by laser diode holographic interferometry", Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); https://doi.org/10.1117/12.248661

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