公开(公告)号：US20200150420A1

公开(公告)日：2020-05-14

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: G02B26/12 ,  G02B26/08 ,  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.