Abstract
A new approach to the measurement of ultrasonic vibrations has been developed at the INEEL. This system utilizes heterodyne interferometric detection in a photorefractive material to provide real time, full field images of ultrasonic vibration amplitude and phase without scanning. The INEEL Laser Ultrasonic Camera has linear response for ultrasonic displacements ζ < λ/4π, or approx. 45 nm displacements at a laser wavelength of 532 nm. In addition, the system exhibits flat response and narrow band detection for a broad range of vibration frequencies (Hz to GHz). The system is very robust, and has the potential for operation even in noisy industrial settings. A description of the system, representative data and several potential applications will be presented.
| Original language | English |
|---|---|
| Pages (from-to) | 144-152 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3783 |
| State | Published - 1999 |
| Event | Proceedings of the 1999 Optical Diagnostics for Fluids/Heat/Combustion and Photomechanics for Solids - Denver, CO, USA Duration: Jul 21 1999 → Jul 23 1999 |
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