ACCELERATED LASER SPECKLE STRAIN GAUGE.

Ichirou Yamaguchi*, Takeo Furukawa, Toshitsugu Ueda, Eiji Ogita

*この研究の対応する著者

研究成果: Article査読

16 被引用数 (Scopus)

抄録

An improved version of the laser speckle strain gauge is presented in which speckle displacement caused by deformation of a laser-illuminated object is detected in real time using new photodetectors in place of the linear image sensors and microcomputer in the conventional version. The detector, called a spatial filtering detector with electronic scanning produces a voltage directly proportional to speckle displacement. Therefore, this strain gage, which utilizes differential speckle displacement, delivers a voltage that is proportional to surface strain. It has a strain sensitivity of a few millivolts per microstrain. We applied this gauge to strain measurements of high-polymer films in various directions under loading at frequencies up to several tens of hertz and were able to evaluate their Poisson ratios.

本文言語English
ページ(範囲)671-676
ページ数6
ジャーナルOptical Engineering
25
5
出版ステータスPublished - 1986 5
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学

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