Dynamic Holographic Lock-In Imaging of Ultrasonic Waves
- Lockheed Martin Idaho Technologies Company
- University of Colorado
- INEEL
A laser imaging approach is presented that utilizes the adaptive property of photorefractive materials to produce a real-time measurement of ultrasonic traveling wave surface displacement and phase in all planar directions simultaneously without scanning. The imaging method performs optical lock-in operation. A single antisymmetric Lamb wave mode image produces direct quantitative determination of the phase velocity in all planar directions showing plate stiffness anisotropy. Excellent agreement was obtained with modeling calculations of the phase velocity in all planar directions for an anisotropic sheet material. The approach functions with diffusely scattering surfaces, subnanometer motions and at frequencies from Hz to GHz.
- Research Organization:
- Idaho National Engineering and Environmental Lab., Idaho Falls, ID (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC07-94ID13223
- OSTI ID:
- 10487
- Report Number(s):
- INEEL/CON-99-00472
- Country of Publication:
- United States
- Language:
- English
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