System and method for ultrasonic laser testing using a laser source to generate ultrasound having a tunable wavelength
US6335943B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Jul 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02854
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for generating ultrasonic displacements on a remote target. The method of the present invention includes the steps of first using a laser to generate a beam having a first wavelength to produce ultrasonic displacements at the remote target. This laser beam will have a first wavelength which can be modulated to alter characteristics of the ultrasonic displacements. These ultrasonic displacements at the remote target can be optimized to enhance the detection optics for collecting phase modulated light from the second pulsed laser beam either reflected or scattered by the remote target; an interferometer to process the phase modulated light and generate at least one output signal, and means for processing the at least one output signal to obtain data representative of the ultrasonic surface displacements on the surface of the remote target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.