角度多重記録ホログラフィによる高速破壊現象の3コマ連続撮影

概要

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The present paper shows a method of high-speed holographic microscopy which can take three successive photographs of a crack rapidly propagating in PMMA. The crack speed is of the order of 200m/sec. The optical system of the high-speed holographic microscopy consists of three Q-switched ruby lasers as light sources. By varying the angle of incidence of the reference beams, the optical system records the crack as three holograms on one photographic plate, that is angle multiplexing holography. The time interval between two of the three holography recordings is about 1 μsec or longer, and the spatial resolution of the reconstructed crack images is about 114 lines/mm. From the photographs, one can measure the running speed and the opening displacement of the crack and, know the crack propagation in the time scale of microseconds.
社団法人日本機械学会の論文
1996-12-25