Strain and vibration analysis by fibre based speckle shearing interferometry

被引：14
|
作者：
Valera, JDR [1 ]
Jones, JDC [1 ]
Towers, DP [1 ]
Buckberry, CH [1 ]
机构：
[1] ROVER LTD,APPL OPT GRP,GAYDON TEST CTR,LIGHTHORNE CV35 0BL,WARWICK,ENGLAND
来源：
OPTICS AND LASERS IN ENGINEERING | 1997年 / 26卷 / 4-5期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1016/0143-8166(95)00144-1
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An optical fibre based, speckle shearing interferometer is described. The instrument uses a highly birefringent optical fibre to illuminate a test object with equal intensities of light guided by the orthogonal polarisation eigenstates of the fibre. A Wollaston prism is used to obtain two sheared images with adjustable shear. Optical phase changes between the sheared images are readily achieved, without mechanical movement of components, by straining the optical fibre. Object strain determination, by fringe analysis with phase stepping techniques, is readily achieved. Vibration analysis by heterodyning is also reported. Copyright (C) 1996 Elsevier Science Ltd.
引用
收藏
页码：361 / 376
页数：16
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