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Proceedings Paper

Time-resolved oblique incidence interferometer for vibration analysis of rough surface
Author(s): Yasuhiro Mizutani; Takayuki Higuchi; Tetsuo Iwata; Yukitoshi Otani
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Paper Abstract

This paper describes a motion-visualization technique for a sample with rough surface by using a stroboscopic oblique-incidence interferometer. To observe a vibrated rough surface, we focused on an oblique-incidence interferometer. The oblique-incidence interferometer is well suited to analysis the rough surface and a displacement of several micrometers because a scattering at a rough surface is reduced. However, by using a continuous light, a visibility of the fringe pattern at a vibrated surface in the ultrasonic region is not good. Therefore, the oblique-incidence interferometer is not suitable for analysis of the ultrasonic vibration. To overcome the problem, a pulsed light synchronized with a vibrated sample was used as a light source by an acousto-optic modulator. To control timing between a reference signal and an input signal of the light source by using a common oscillator, time-resolved behavior of the stator can be measured. By using the interferometer, we have succeeded to detect a periodically movement of a fringe pattern of the vibrated of the stator.

Paper Details

Date Published: 27 May 2011
PDF: 8 pages
Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 80823J (27 May 2011); doi: 10.1117/12.889464
Show Author Affiliations
Yasuhiro Mizutani, Univ. of Tokushima (Japan)
Takayuki Higuchi, Univ. of Tokushima (Japan)
Tetsuo Iwata, Univ. of Tokushima (Japan)
Yukitoshi Otani, Utsunomiya Univ. (Japan)

Published in SPIE Proceedings Vol. 8082:
Optical Measurement Systems for Industrial Inspection VII
Peter H. Lehmann; Wolfgang Osten; Kay Gastinger, Editor(s)

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