影栅云纹法中的离面位移与斜率耦合条纹的光力学分析  

Optics-mechanics analysis method about the coupled fringe pattern of off-plane displacement and slope in shadow moiré

作　　者：云大真[1] 云海[1] 

机构地区：[1]大连理工大学工程力学系,辽宁大连116024

出　　处：《光学技术》2005年第2期299-301,共3页Optical Technique

摘　　要：基于传统的概念,影栅云纹法只能实时获得表征物体大离面位移(深度)的条纹。若要获得反映斜率的条纹,则只有用镜面试件通过反射云纹法或其它的光测法来获得。在研究中发现,在一定的条件下,用影栅云纹法可以获得离面位移与斜率的耦合条纹图。这个新发现打破了已有的传统概念。实验证实了简单实用的影栅云纹法不但能获得物体大变形时的离面位移,而且也可以获得与之对应的斜率条纹。给出了典型的可实时获得的耦合条纹图,并对其基本原理、计算方法和实验技术进行了论述。According to the traditional conception, the shadow moiré fringes only give an indication of the large off-plane displacement W. If the slope W′ moiré fringes are wanted, one must change the specimen with mirror surface and by the reflection moiré method. However, a new conception is found in the shadow moiré experiments aimed at the off-plane displacement, the coupled moiré fringes of the off-plane displacement W with the slope W′ on one same patterns are gotten. The typical and real-time coupled moiré fringe patterns are offered, the basic principle, the calculation method and the experiment techniques are also presented.

关 键 词：影栅云纹法 离面位移 斜率 耦合影栅云纹图 

分 类 号：O348.12[理学—固体力学] TN911.73[理学—力学]