Speckle mitigation
US10684114B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 1, 2019 |
| Grant date | Jun 16, 2020 |
| Priority date | — |
| Expiry date | Mar 1, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/479
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Described herein is a method and system for mitigating the effects of speckle in a laser Doppler system, and, in particular in a laser Doppler vibrometry/velocimetry system. A scan unit is provided in at least one of: a transmit path for scanning at least one beam from a transmitting antenna over a moving target surface and a receive path for scanning at least one reflected beam received from the moving target surface onto a receiving antenna. An averaging unit is provided prior to post-processing or demodulation to average electrical signals corresponding to the reflected beams. By averaging before demodulation, speckle in the output signal is mitigated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.