Detecting Ultrasonic Displacement on Solid Surface by Laser Heterodyne Method
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Abstract: The principle and way of dectecing ultrasonic displacement of solid surfaces with laser heterodyne and phase-lockedloop to demodulate are described. Ultrasonic displacement of solid surfaces is detected with a laser heterodyne interferometer and a satisfactory conclusion is got.
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Keywords:
- ultrasonic measurement /
- laser heterodyne /
- interferometer
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