Method for detecting low sub surface damages of rigid brittle optical material
A sub-surface damage and optical material technology, applied in the direction of optical testing flaws/defects, using optical devices, measuring devices, etc., to achieve the effects of simple structure of testing instruments, high accuracy of testing results, and simple testing methods
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[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0028] The low subsurface damage detection method of hard and brittle optical materials in this embodiment includes the following steps:
[0029] (1) Preparation of test equipment
[0030] Such as figure 1 As shown, the test instrument comprises a dial 1, an object stage 2, a laser 3, a first polarizer 4, a light intensity meter 5 and a second polarizer 6, and the dial 1 can be rotated on a horizontal platform. The edge of the upper surface of the disk 1 has scale lines arranged along the circumferential direction, and the stage 2 is shaped as a disc and is arranged in the middle of the dial 2 to fix the sample 10 to be tested. The stage 2 is the same as the dial 1. The shaft is arranged and can rotate with the rotation of the dial 1 .
[0031] The laser 3 is arranged near the edge of the dial 1, and the incident light emitted by the laser ...
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