Pulsed digital holography for vibration analysis

Hans J. Tiziani; Giancarlo Pedrini; Philipp Froening

doi:10.1117/12.323315

29 September 1998 Pulsed digital holography for vibration analysis

Hans J. Tiziani, Giancarlo Pedrini, Philipp Froening

Proceedings Volume 3407, International Conference on Applied Optical Metrology; (1998) https://doi.org/10.1117/12.323315
Event: International Conference on Applied Optical Metrology, 1998, Balatonfured, Hungary

Abstract

Pulsed digital holography is very useful for vibration analysis. In order to increase the temporal resolution a ruby laser producing up to four pulses has been used. The separate digital holograms (one hologram for each pulse) of an object under test are recorded in few microseconds on three CCD sensors. The images of the recorded holographic interference patterns are captured digitally with a framegrabber inside a Personal Computer. The reconstruction of the holograms is performed digitally by means of computer. For the later quantitative evaluation of the reconstructed holograms, the Fourier method is used. The optical phase of each hologram is obtained from the complex amplitude and the deformation between two laserpulses is calculated from phase subtraction and phase unwrapping of these two holograms. Experimental results are presented.

Citation Download Citation

Hans J. Tiziani, Giancarlo Pedrini, and Philipp Froening "Pulsed digital holography for vibration analysis", Proc. SPIE 3407, International Conference on Applied Optical Metrology, (29 September 1998); https://doi.org/10.1117/12.323315

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