| 摘要 |
<p>Method and apparatus for analyzing the deformation of an object (20) resulting from the application of stress. A novel optical element is used to perform shearometric analysis upon a test object. The novel optical element has an overall pattern of first and second pluralities of regions having significantly different indices of transmissivity (22). The pattern of variations causes pairs of light rays which are reflected from two distinct points (P1, P2) on the test object at a divergent angle to emerge from the optical element so that they are nearly parallel. The nearly parallel rays are then received upon a photoelectrical sensing means (24) such as video camera or photoelectric array.</p> |
