Phase evaluation of speckle patterns during continuous deformation by use of phase-shifting speckle interferometry

被引:31
作者
Carlsson, TE [1 ]
Wei, A [1 ]
机构
[1] KTK, Dept Mat Proc, Ind Metrol & Opt, S-10044 Stockholm, Sweden
关键词
D O I
10.1364/AO.39.002628
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A method far measurement of continuous displacements that uses phase-shifting speckle interferometry is presented. The initial random phase of the speckle pattern is evaluated by phase shifting before deformation. The changing phase thereafter is evaluated from only one image at a time by a least-squares algorithm. The technique can be used for measuring transients and other dynamic events, heat expansion as well as other phenomena, for which it is difficult to accomplish phase shifting during deformation. Theory along with computer simulations and experimental results are described. (C) 2000 Optical Society of America OCIS codes: 120.6160, 120.5050, 180.5060, 090.2880.
引用
收藏
页码:2628 / 2637
页数:10
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