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IJAT Vol.11 No.5 pp. 800-805
doi: 10.20965/ijat.2017.p0800
(2017)

Paper:

Time-Resolved Oblique Incident Interferometry for Vibration Analysis of an Ultrasonic Motor

Yasuhiro Mizutani*,†, Takayuki Higuchi**, Tetsuo Iwata**, and Yasuhiro Takaya*

*Department of Mechanical Engineering, Osaka university
2-1 Yamadaoka, Suita, Osaka 565-0871, Japan

Corresponding author

**Institute of Technology and Science, The University of Tokushima, Tokushima, Japan

Received:
January 26, 2017
Accepted:
April 25, 2017
Online released:
August 30, 2017
Published:
September 5, 2017
Keywords:
ultrasonic motor, interferometer, time-resolved analysis, oblique incidence light
Abstract

This paper presents a technique that employs a stroboscopic oblique-incidence interferometer to visualize the motion of a vibrating object with a rough surface. An oblique-incidence interferometer is well suited to the analysis of a rough surface and micro displacement because light-scattering is reduced when a surface is rough. However, when continuous light is used, the fringe pattern on the vibrating surface in the ultrasonic region can not be observed for the analysis of a micrometer resolution profile. To overcome this problem, pulsed light synchronized with a vibrating sample is employed as a light source using an acousto-optic modulator (AOM). The timing between the vibrating sample and the observation light is controlled using a common oscillator, so that the time-resolved behavior of the stator can be measured. We successfully detect the periodic movement of a fringe pattern for a vibrating ultrasonic motor using the interferometer.

Cite this article as:
Y. Mizutani, T. Higuchi, T. Iwata, and Y. Takaya, “Time-Resolved Oblique Incident Interferometry for Vibration Analysis of an Ultrasonic Motor,” Int. J. Automation Technol., Vol.11 No.5, pp. 800-805, 2017.
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