US 11,808,889 B2
LiDAR device
Ji Seong Jeong, Gwangju (KR); Jun Hwan Jang, Seoul (KR); Dong Kyu Kim, Jinju-si (KR); and Sung Hi Hwang, Jeollanam-do (KR)
Assigned to SOS LAB Co., Ltd., Gwangju (KR)
Filed by SOS LAB CO., LTD, Gwangju (KR)
Filed on Dec. 10, 2019, as Appl. No. 16/709,729.
Application 16/709,729 is a continuation of application No. 16/240,512, filed on Jan. 4, 2019.
Claims priority of provisional application 62/671,305, filed on May 14, 2018.
Claims priority of application No. 10-2018-0002494 (KR), filed on Jan. 8, 2018; application No. 10-2018-0026560 (KR), filed on Mar. 6, 2018; application No. 10-2018-0027385 (KR), filed on Mar. 8, 2018; application No. 10-2018-0081896 (KR), filed on Jul. 13, 2018; application No. 10-2018-0095385 (KR), filed on Aug. 16, 2018; and application No. 10-2018-0126278 (KR), filed on Oct. 22, 2018.
Prior Publication US 2020/0241118 A1, Jul. 30, 2020
Int. Cl. G01S 7/481 (2006.01); G01S 17/08 (2006.01); G01S 17/42 (2006.01)
CPC G01S 7/4817 (2013.01) [G01S 17/08 (2013.01); G01S 17/42 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A light detection and ranging_(lidar) device which measures for measuring a distance using a laser comprising:
a laser emitter configured to emit a laser;
a nodding mirror configured to nod about a first axis, wherein the nodding mirror includes a reflective surface configured to reflect the laser emitted from the laser emitter, wherein a size of the reflective surface is less than or equal to a maximum diameter of the laser;
a rotating polygon mirror configured to rotate about a second axis perpendicular to the first axis, wherein the rotating polygon mirror includes a plurality of reflective surfaces each configured to reflect the laser reflected from the nodding mirror, and wherein a size of each of the plurality of reflective surfaces is greater than the maximum diameter of the laser; and
a sensor configured to detect a laser reflected from an object;
wherein the lidar device further comprises an irradiation portion configured to irradiate an irradiation laser toward the object based on the laser reflected by the rotating polygon mirror,
wherein the lidar device has a first field of view defined in a horizontal direction and a second field of view defined in a vertical direction, the first field of view being greater than the second field of view,
wherein an intensity of the irradiation laser is configured to vary with a direction of the irradiation laser,
wherein a first variation in intensity resulting from a change in the vertical direction of the irradiation laser is greater than a second variation in intensity resulting from a change in the horizontal direction of the irradiation laser, and
wherein the laser emitter, the nodding mirror and the rotating polygon mirror are arranged such that:
(i) the laser emitted from the laser is reflected from the rotating polygon mirror after being reflected from the nodding mirror,
(ii) a horizontal component of the direction of the irradiation laser is changed by the rotating polygon mirror,
(iii) a vertical component of the direction of the irradiation laser is changed by the nodding mirror, and
(iv) as the vertical component of the direction of the irradiation laser increases, the intensity of the irradiation laser increases, while an intensity of the laser emitted from the laser emitter is maintained the same.