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:
Mar. 08, 2022
Filed:
Oct. 30, 2019
Electronics and Telecommunications Research Institute, Daejeon, KR;
Eui Su Lee, Sejong-si, KR;
Kyung Hyun Park, Daejeon, KR;
Il Min Lee, Daejeon, KR;
Kiwon Moon, Daejeon, KR;
Dong Woo Park, Sejong-si, KR;
Hyun Soo Kim, Daegu, KR;
Ho Jin Lee, Daejeon, KR;
Jeong Woo Park, Daejeon, KR;
Jun Hwan Shin, Daejeon, KR;
Kyeong Sun Choi, Sejong-si, KR;
Dahye Choi, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Provided are a polygon mirror assembly and a scan device. A polygon mirror assembly includes: a polygon mirror including a plurality of reflection surfaces spaced apart from a rotation axis by a predetermined distance; a first motor for rotating the polygon mirror around the rotation axis; a second motor for moving the polygon mirror in a first axial direction such that the rotation axis is tilted while the first motor rotates the polygon mirror; and a clock signal extraction surface for extracting a clock signal for detecting a change in a rotational speed of the first motor.