Determination of glass thickness using laser-based ultrasound
| Autor: | Frank J. Shih, Bruno F. Pouet, Marvin B. Klein, Andrew D. W. McKie |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Frequency response
Materials science business.industry Ultrasound Physics::Optics Laser Condensed Matter::Disordered Systems and Neural Networks law.invention Condensed Matter::Soft Condensed Matter Interferometry Optics law Waveform Partial reflection business Sensitivity (electronics) Acoustical measurements and instrumentation |
| Zdroj: | AIP Conference Proceedings. |
| ISSN: | 0094-243X |
| DOI: | 10.1063/1.1373771 |
| Popis: | Thickness measurements of glass plates and glass bottles using laser-based ultrasound (LBU) are described. Ultrasound in the glass specimens was generated thermoelastically with either a pulsed CO2 laser, or a Q-switched Nd:YAG laser in the case of colored glass filters. The detection of ultrasound was accomplished by one of the following methods; a spherical Fabry-Perot interferometer system or a photo-refractive interferometer based on two-wave mixing. A self-interference effect, utilizing the partial reflection from the front and back faces of a glass plate was also demonstrated to have sufficient sensitivity under certain conditions. The thickness of the glass plates and colored glass bottles was determined using the fundamental reverberation frequency obtained from the time-domain waveform data. LBU results were compared to physical thickness measurements and showed excellent agreement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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