The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2022
Filed:
Mar. 28, 2018
Nec Corporation, Tokyo, JP;
Hidemi Noguchi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A distance measurement device () generates transmission light by modulating an optical carrier wave. The distance measurement device () transmits the generated transmission light, and receives reflected light acquired by the transmission light being reflected by a measured object (). The distance measurement device () generates a first beat signal by causing the transmission light to interfere with reference light. The distance measurement device () generates a second beat signal by causing the reflected light to interfere with the reference light. The distance measurement device () calculates a distance to the measured object (), based on a difference between the first beat signal and the second beat signal.