Stray-light tolerant lidar measurement system and stray-light tolerant lidar measurement method
US10866319B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 11, 2016 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Mar 8, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A90/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A stray-light tolerant LIDAR measurement system. The system comprises an interferometer assembly having a continuous-wave laser source, a photodetection arrangement and optical components. The laser source comprises a laser-light-generating component, a downstream optical phase modulator and a control unit connected to the modulator to deliver a control signal corresponding to a pseudo-noise signal defined by a predetermined phase function. The interferometer assembly comprises an evaluation unit which is coupled to the interferometric photodetector assembly to detect the detector signals of same and to determine the presence and/or movement of particles and/or objects from the detector signals wherein, in the case of two wavelengths emitted from the laser light generating components, the detector signals are detected separately in two wavelength regions, and the phase function has a predetermined step-like time course and the evaluation unit scans the detector signals in synchrony with the timing of the steps of the phase function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.