Optical sensor for mirror zero angle in a scanning lidar
US12372624B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2021 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | May 30, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure relates to systems and methods that provide an accurate angle measurement of a rotatable mirror. An example method includes receiving, from a detector device, a reflected light signal. The reflected light signal is indicative of primary reflection light and secondary reflection light. The primary reflection light corresponds to a first portion of emission light that reflects directly from the reflective surface of the rotatable mirror toward the detector device. The secondary reflection light corresponds to a second portion of emission light that: 1) reflects from the reflective surface of the rotatable mirror toward a secondary mirror surface; 2) reflects from the secondary mirror surface toward the reflective surface of the rotatable mirror; and 3) reflects from the reflective surface of the rotatable mirror toward the detector device. The method also includes determining, based on the reflected light signal, the rotational angle of the rotatable mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.