Reception of Ultrasound by Laser
They are non-contacting and thus do not disturb the ultrasonic field.
Being remote, the point of measurement may be quickly moved and there are no restrictions on surface temperature.
High spatial resolution may be obtained without reducing sensitivity. The measurements may be localized over a few |im if necessary.
Interferometric measurements may be directly related to the wavelength of the light, so that no other calibration is required.
They have a truly broadband frequency response, difficult to achieve with piezoelectric probes especially at high frequencies.
KeywordsReference Beam Ultrasonic Signal Optical Path Difference Path Length Difference Bragg Cell
Unable to display preview. Download preview PDF.
- 1.Scruby C B and Drain L E: Laser Ultrasonics, Adam Hilger, Bristol 1990.Google Scholar