Abstract
We developed a nondestructive and noncontact method for measuring stress at the midplane of tempered glass plates that uses Bragg scattering from a pair of thermal gratings. These gratings are formed by 1064-nm beams from a seeded Nd:YAG laser, and we measure the polarization state of light from a 532-nm beam that scatters from both thermal gratings. The change in polarization of the doubly scattered light with separation between the two gratings allows measurement of the in-plane stress. A model of the Bragg scattering efficiency, experimental investigations of the scattered beams, and stress measurements are reported.
Original language | English |
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Pages (from-to) | 5354-5369 |
Number of pages | 16 |
Journal | Applied Optics |
Volume | 40 |
Issue number | 30 |
DOIs | |
State | Published - Oct 10 2001 |
Externally published | Yes |