公开(公告)号：US11269178B2

公开(公告)日：2022-03-08

申请号：US16668574

申请日：2019-10-30

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Eui Su Lee ,  Kyung Hyun Park ,  Il Min Lee ,  Kiwon Moon ,  Dong Woo Park ,  Hyun Soo Kim ,  Ho Jin Lee ,  Jeong Woo Park ,  Jun Hwan Shin ,  Kyeong Sun Choi ,  Dahye Choi

IPC: G02B26/08 ,  G02B26/12 ,  G02B26/10

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.

公开(公告)号：US11121442B2

公开(公告)日：2021-09-14

申请号：US16588271

申请日：2019-09-30

Applicant: Electronics and Telecommunications Research Institute

Inventor： Dahye Choi ,  Kyung Hyun Park ,  Il Min Lee

IPC: H01P1/207 ,  H01P3/127

Abstract: Provided is a waveguide including an input end configured to receive an input wave from an outside; a filtering portion configured to change a frequency range of the input wave; an output end configured to output an output wave of which a frequency range is changed from the frequency range of the input wave; and an inner wall controller configured to control a size of an inner wall of the filtering portion such that the frequency range of the input wave changes to the frequency range of the output wave.