Lidar device

Patent metadata

Field	Value
Publication number	US-2023161004-A1
Application number	US-202117919266-A
Country	US
Kind code	A1
Filing date	Apr 16, 2021
Priority date	Apr 16, 2020
Publication date	May 25, 2023
Grant date	—

Abstract

A LIDAR device is disclosed. A LIDAR device according to one embodiment of the present invention comprises: a light transmitting unit for transmitting laser light; a light receiving unit for receiving the laser light received by being reflected from the outside; a scanner including a transmitting mirror unit that has a reflective surface for reflecting the laser light transmitted from the light transmitting unit and transmitting the same to the outside, and a receiving mirror unit that has a reflective surface for reflecting the laser light reflected from the outside and transmitting the same to the light receiving unit; and an optical path dividing unit disposed in the vicinity of the scanner so as to block, from flowing into the light receiving unit, scattered light of a propagating laser light reflected from the transmitting mirror unit.

First claim

1 . A LIDAR device, comprising:
a light transmitting unit for transmitting laser light; a light receiving unit for receiving the laser light received by being reflected from the outside; a scanner comprising a transmitting mirror unit that has a reflective surface for reflecting the laser light transmitted from the light transmitting unit and transmitting the same to the outside, and a receiving mirror unit that has a reflective surface for reflecting the laser light reflected from the outside and transmitting the same to the light receiving unit; and an optical path dividing unit disposed in the vicinity of the scanner so as to block, from flowing into the light receiving unit, scattered light of a propagating laser light reflected from the transmitting mirror unit.

2 . The LIDAR device of claim 1 , wherein the transmitting mirror unit and the receiving mirror unit are disposed in different layers, and
wherein the optical path dividing unit comprises a plate-shaped blocking member which is horizontally disposed at a boundary between the transmitting mirror unit and the receiving mirror unit.

3 . The LIDAR device of claim 2 , wherein the transmitting mirror unit and the receiving mirror unit respectively have a plurality of reflective surfaces, and the scanner rotates about a fixed axis, and
wherein the inner side of the blocking member close to the scanner comprises a part formed by being recessed in an arc shape from the inner side to the outer side.

4 . The LIDAR device of claim 3 , wherein the outer side of the blocking member is disposed in contact with a cover window which is disposed to cover a transmission path and a reception path of the laser light.

5 . The LIDAR device of claim 3 , wherein a boundary between the transmitting mirror unit and the receiving mirror unit is perpendicular to the fixed axis.

6 . The LIDAR device of claim 3 , further comprising:
an axis fixing unit which is disposed to surround a part of the scanner to fix the scanner on the fixed axis, wherein the optical path dividing unit further comprises a fixing member which is coupled to the axis fixing unit, and wherein the blocking member is disposed to be connected to the fixing member.

7 . The LIDAR device of claim 3 , wherein the scanner further comprises a boundary member which is disposed to protrude outward from a boundary between the transmitting mirror unit and the receiving mirror unit.

8 . The LIDAR device of claim 2 , wherein the transmitting mirror unit and the receiving mirror unit are respectively disposed over two or more layers, and
wherein the blocking member is disposed to correspond to each boundary between the transmitting mirror unit and the receiving mirror unit.

9 . The LIDAR device of claim 8 , wherein the blocking member is disposed to correspond to each boundary between each layer of the scanner.

10 . The LIDAR device of claim 8 , wherein the light path dividing unit further comprises a reinforcing member which extends vertically between the blocking members to prevent the blocking members from sagging.

11 . A LIDAR device, comprising:
a light transmitting unit for transmitting laser light; a light receiving unit for receiving the laser light received by being reflected from the outside; a scanner comprising a transmitting mirror unit that has a reflective surface for reflecting the laser light transmitted from the light transmitting unit and transmitting the same to the outside, and a receiving mirror unit that has a reflective surface for reflecting the laser light reflected from the outside and transmitting the same to the light receiving unit; and an optical path dividing unit disposed in the vicinity of the scanner so as to block, from flowing into the light receiving unit, scattered light of a propagating laser light reflected from the transmitting mirror unit, wherein in the scanner, the transmitting mirror unit comprises a first transmitting mirror unit and a second transmitting mirror unit which is disposed below the first transmitting mirror unit, and the receiving mirror unit comprises a first receiving mirror unit which is disposed between the first transmitting mirror unit and the second transmitting mirror unit, and a second receiving mirror unit which is disposed between the first receiving mirror unit and the second transmitting mirror unit, and wherein the optical path dividing unit comprises a plate-shaped first blocking member which is horizontally disposed at a boundary between the first transmitting mirror unit and the first receiving mirror unit, and a plate-shaped second blocking member which is horizontally disposed at a boundary between the second transmitting mirror unit and the second receiving mirror unit.

12 . The LIDAR device of claim 11 , wherein the optical path dividing unit further comprises a plate-shaped third blocking member which is horizontally disposed at a boundary between the first receiving mirror unit and the second receiving mirror unit.

13 . The LIDAR device of claim 11 , wherein the scanner further comprises a first boundary member which is disposed to protrude outward from a boundary between the first receiving mirror unit and the second receiving mirror unit.

14 . The LIDAR device of claim 13 , wherein the scanner further comprises a second boundary member which is disposed to protrude outward from a boundary between the first transmitting mirror unit and the first receiving mirror unit, and a third boundary member which is disposed to protrude outward from a boundary between the second transmitting mirror unit and the second receiving mirror unit.

Assignees

• Hl Klemove Corp

Inventors

• Han Hakgu
• Shin Ho Seok
• Lee Chul Seung
• Jeong Seong Hee
• Han Yun Ki

Classifications

• G02B26/12 Primary

  using multifaceted mirrors · CPC title

• Y02A90/10

  Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation · CPC title

• G02B5/09

  Multifaceted or polygonal mirrors {, e.g. polygonal scanning mirrors; Fresnel mirrors} · CPC title

• G01S7/4816

  of receivers alone · CPC title

• G01S17/931

  of land vehicles · CPC title