公开(公告)号：US4179217A

公开(公告)日：1979-12-18

申请号：US877758

申请日：1978-02-14

申请人： Andre J. Robert ,  Jean C. Filippini ,  Michel Ferre

发明人： Andre J. Robert ,  Jean C. Filippini ,  Michel Ferre

IPC分类号： G01L1/24 ,  G01N21/23 ,  G01J4/04

CPC分类号： G01L1/241 ,  G01N21/23

摘要： This invention relates to a dynamic photoelasticimeter with a rotating birefringent element. It comprises a laser, a birefringent plate rotatable at a constant speed, a model to be studied, a circular analyzer and a photodetector supplying signals at its output having frequency components of 2.omega. and 4.omega.. The ratio of the amplitudes of these signals supplies an indication of the phase shift .phi. (t) contributed by the model, and the phase of the signal of the frequency 4.omega. contributes information as to the orientation .theta. of the axes of the model at the point in question.The present invention provides a particularly simple and accurate dynamic photoelasticimeter.

摘要翻译： 本发明涉及具有旋转双折射元件的动态光弹性计。 它包括激光器，以恒定速度旋转的双折射板，待研究的模型，圆形分析器和在其输出处提供具有2ω和4ω的频率分量的信号的光电检测器。 这些信号的幅度比率提供了由模型贡献的相移phi（t）的指示，并且频率4ω的信号的相位贡献关于在模型的轴的方向θ的信息 有问题。 本发明提供了一种特别简单且精确的动态光弹性计。