Laser rangefinder and method of measuring distance and direction
US9958546B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 2, 2015 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Jun 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4915
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A laser rangefinder includes: a MEMS mirror that changes a traveling direction of laser light; a first photodetector that reflects a portion of the laser light directed in a predetermined direction by the MEMS mirror and receives another portion of the laser light; a second photodetector that receives first reflected light that is reflection of the laser light from a target object outside an enclosure and second reflected light that is reflection of the portion of the laser light from the first photodetector; and a signal processor that calculates a distance from the laser rangefinder to the target object by subtracting, from a first distance from the laser diode to the target object calculated using the first reflected light, a second distance from the laser diode to the first photodetector calculated using the second reflected light, and calculates a direction of the target object with respect to the laser rangefinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.