Remote target identification using laser Doppler vibrometry
US10156473B2 · kind B2 · utility
0Cited by
7References
12Claims
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Key dates
| Filing date | Sep 2, 2015 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Jun 7, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser Doppler vibrometer architecture and detection technique that can remotely identify targets based on their natural vibration frequencies using a scanning Fabry-Pérot interferometer. The proposed systems and methods can have stand-off distances longer than the coherence length of the laser by using spectroscopic detection methods instead of coherent heterodyne detection using a local oscillator. Pulsed lasers can be used which have high power output. In addition, by not using an acousto-optic modulator, the speed of the detectable target is not limited. Also the mixing efficiency of the return signal can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.