9 September 1999 Holographic vibration analysis by frequency compensation stroboscopic illuminations
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Proceedings Volume 3823, Laser Metrology and Inspection; (1999) https://doi.org/10.1117/12.360973
Event: Industrial Lasers and Inspection (EUROPTO Series), 1999, Munich, Germany
Abstract
In the paper we report some factors which determine the quality of stroboscopic holography. A one-side fixed ruler is considered as a model for theoretical investigation. It is shown that by compensation of one frequency of mode-shape the viewed interferometric picture depends not only on mode-shape of a second frequency (harmonic, for example), but also from the duration of strobe-pulses and accuracy of phases of stroboscopic illumination. A parasitic system of interferometric fringes and mode-shape distortion may be observed. Computer calculations have shown that the displacement of position of interferometric fringes leads to errors in the analysis of holographic information. Experimental investigation by using the special stroboholographic system confirmed the theoretical investigation. A parasitic system of interferometric fringes is distinctly observed on the hologram when phases of strobe- pulses are set up incorrectly. A new stroboholographic arrangement where parameters of stability of strobe-pulse duration and accurate phase improved the results.
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Mikhail E. Gusev, Mikhail E. Gusev, Vadim S. Gurevich, Vadim S. Gurevich, Anry Isayev, Anry Isayev, } "Holographic vibration analysis by frequency compensation stroboscopic illuminations", Proc. SPIE 3823, Laser Metrology and Inspection, (9 September 1999); doi: 10.1117/12.360973; https://doi.org/10.1117/12.360973
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