Invention Grant
- Patent Title: Distance measurement based on difference of two beat signals generated from same reference light
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Application No.: US16982021Application Date: 2018-03-28
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Publication No.: US11435477B2Publication Date: 2022-09-06
- Inventor: Hidemi Noguchi
- Applicant: NEC Corporation
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- International Application: PCT/JP2018/012785 WO 20180328
- International Announcement: WO2019/186776 WO 20191003
- Main IPC: G01B9/02
- IPC: G01B9/02 ; G01S17/34 ; G01B9/02003
Abstract:
A distance measurement device (2000) generates transmission light by modulating an optical carrier wave. The distance measurement device (2000) transmits the generated transmission light, and receives reflected light acquired by the transmission light being reflected by a measured object (10). The distance measurement device (2000) generates a first beat signal by causing the transmission light to interfere with reference light. The distance measurement device (2000) generates a second beat signal by causing the reflected light to interfere with the reference light. The distance measurement device (2000) calculates a distance to the measured object (10), based on a difference between the first beat signal and the second beat signal.
Public/Granted literature
- US20210018626A1 DISTANCE MEASUREMENT DEVICE AND CONTROL METHOD Public/Granted day:2021-01-21
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