Stress measurements in glass by use of double thermal gratings

Bret D. Cannon, Chester Shepard, Mohammad Khaleel

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

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 languageEnglish
Pages (from-to)5354-5369
Number of pages16
JournalApplied Optics
Volume40
Issue number30
DOIs
StatePublished - Oct 10 2001
Externally publishedYes

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