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APPLICATION OF GRATING DIFFRACTION IN STRAIN MEASUREMENT

Qin Yuwen Hu Changhua Ji Xinhua (Tianjin University,Tianjin,300072 P.R.China)  
In this paper a new technique for measuring strain is presented.Using grating as the strain sensor,we can obtain strain and stress components by measuring the deformation of the space position of diffraction spots.The cost of the hologra hic grating by embossing is much reduced.By using the video and computer techniques the strain and stress Values can be obtained automatically.
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