Phase sensitive ultrasonic modulation method for the detection of strain-sensitive spectral features
US4614116A · kind A · utility
5Cited by
2References
9Claims
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Key dates
| Filing date | Feb 4, 1985 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Feb 4, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A phase-sensitive ultrasonic modulation method for the detection of strain-sensitive spectral features involves the use of an ultrasonic field with well-defined wavefronts and a light beam of spot size less than the ultrasonic wavelength and of linewidth less than that of the spectral feature. When the light wavelength coincides with the wavelength of the spectral feature, the ultrasonic wave shifts, splits, or broadens the absorption lineshapes of the various centers contributing to the spectral feature thereby changing the amplitude or phase of the light beam or emitted fluorescence in synchrony with the ultrasonic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.