Measurement apparatus and measurement method using a laser and beat signals
US11635518B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2020 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | May 16, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4915
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurement apparatus, including: a laser apparatus that outputs a frequency-modulated laser beam with a plurality of modes; a branching part that branches the frequency-modulated laser beam into a reference light and a measurement light; a beat signal generation part that generates a plurality of beat signals by mixing the reference light and a reflected light that is reflected by radiating the measurement light onto an object to be measured; a conversion part that converts the plurality of beat signals into digital signals by sampling the beat signals at a frequency greater than or equal to four times a resonator frequency of the laser resonator; and a calculation part that calculates a distance from the measurement apparatus to the object to be measured on the basis of the digital signals is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.