Optical vibration imager
US7193720B2 · kind B2 · utility
24Cited by
20References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 17, 2005 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Jul 26, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H9/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A remote sensor capable of imaging vibrations at many simultaneous points using high-speed imaging cameras is disclosed. The preferred embodiment operates in heterodyne detection mode using a single camera to capture signals to recover multi-pixel vibrations. One alternative embodiment employs two cameras and homodyne optical I/Q detection. A second alternative embodiment uses a single camera and temporally phase shifted local oscillator to also carry out homodyne optical I/Q detection. The disclosed sensors are capable of scalability to large numbers of pixels and can capture vibration frequencies over a wide range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.