Phase-stepped additive stroboscopic fiber optic TV holography for vibration analysis

Angel F. Doval; J. L. Fernandez; Mariano Perez-Amor; Jesus D. R. Valera; Julian D. C. Jones

doi:10.1117/12.194325

15 November 1994 Phase-stepped additive stroboscopic fiber optic TV holography for vibration analysis

Angel F. Doval, J. L. Fernandez, Mariano Perez-Amor, Jesus D. R. Valera, Julian D. C. Jones

Proceedings Volume 2248, Optical Measurements and Sensors for the Process Industries; (1994) https://doi.org/10.1117/12.194325
Event: Optics for Productivity in Manufacturing, 1994, Frankfurt, Germany

Abstract

A novel technique for out-of-plane vibration analysis combining synchronous phase-stepping with additive stroboscopic TV holography and its implementation on a fiber optic electronic speckle pattern interferometer (FOESPI) are presented. Stroboscopic pulse-to-pulse (high frequency) as well as TV frame-to-frame (low frequency) phase-stepping of the reference arm are combined, with this scheme position of additive fringes is shifted yielding a series of frames (correlograms) which are then processed using conventional phase-stepping algorithms to obtain a phase-map of the vibrating object. A restriction of this technique, taking only two contrast-inverted correlograms for sequential subtraction, is also demonstrated for real-time visibility enhancement of additive fringes.

Citation Download Citation

Angel F. Doval, J. L. Fernandez, Mariano Perez-Amor, Jesus D. R. Valera, and Julian D. C. Jones "Phase-stepped additive stroboscopic fiber optic TV holography for vibration analysis", Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994); https://doi.org/10.1117/12.194325

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