公开(公告)号：US11474241B2

公开(公告)日：2022-10-18

申请号：US16157995

申请日：2018-10-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshihiro Koga ,  Kiyoshi Hibino ,  Takashi Haruguchi ,  Kazuhisa Ide ,  Masaomi Inoue ,  Masahiro Shiihara ,  Kouichi Bairin ,  Kouichi Kumamaru

IPC: G01S17/00 ,  G01S17/18 ,  G01S7/487 ,  G01S17/10 ,  G01S7/481

Abstract: There is provided a distance measurement device that can appropriately detect a distance to an object regardless of the distance. The distance measurement device includes a laser light source, a photodetector, and a controller. The controller performs a long-distance routine that detects timing for receiving light when an object is at a long distance, and a short-distance routine that detects the timing for receiving light when the object is at a short distance, based on a detection signal output from the photodetector during one distance measurement operation. The controller then selects one of a detection result of the timing for receiving light by the long-distance routine and a detection result of the timing for receiving light by the short-distance routine, and calculates the distance to the object irradiated with projection light based on the selected detection result.

公开(公告)号：US12044801B2

公开(公告)日：2024-07-23

申请号：US17153823

申请日：2021-01-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kiyoshi Hibino ,  Takashi Haruguchi ,  Masaomi Inoue ,  Kazuhisa Ide ,  Masahiro Shiihara ,  Kouichi Bairin ,  Kouichi Kumamaru ,  Hirotaka Ueno ,  Hideo Yamaguchi

IPC: G01S7/48 ,  G01S7/481 ,  G02B26/08 ,  G02B26/10

CPC classification number: G01S7/4813 ,  G01S7/4817 ,  G02B26/0816 ,  G02B26/10

Abstract: A distance measurement device for measuring a distance to an object that exists in a distance measurement region includes: a light source configured to emit laser light; a lens configured to converge the laser light emitted from the light source, into substantially parallel light; a tubular light blocking member disposed on an optical path of the laser light emitted from the light source and surrounding the optical path; a photodetector configured to detect reflected light, of the laser light, reflected at the distance measurement region; and a condensing lens configured to condense the reflected light passing through the outside of the light blocking member, onto the photodetector.

公开(公告)号：US20210018625A1

公开(公告)日：2021-01-21

申请号：US17061561

申请日：2020-10-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuhisa Ide ,  Masaomi Inoue ,  Hirotaka Ueno ,  Kouichi KUMAMARU ,  Masahiro SHIIHARA ,  Kouichi BAIRIN ,  Takashi HARUGUCHI ,  Kiyoshi HIBINO

IPC: G01S17/10 ,  G01S7/481

Abstract: A distance measurement device includes: a mirror disposed so as to be tilted relative to a rotation center axis; a drive unit configured to rotate the mirror about the rotation center axis; a photodetector configured to detect reflected light, of laser light, reflected in a distance measurement region; and a condensing lens disposed on the rotation center axis and configured to condense the reflected light reflected by the mirror, on the photodetector. The mirror has a shape elongated in one direction and is disposed such that a short axis thereof is tilted relative to the rotation center axis in a direction parallel to a plane including the rotation center axis. A width in a short-axis direction of the mirror is smaller than a width of a lens portion of the condensing lens as viewed in a direction parallel to the rotation center axis.

公开(公告)号：US11933897B2

公开(公告)日：2024-03-19

申请号：US17061561

申请日：2020-10-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuhisa Ide ,  Masaomi Inoue ,  Hirotaka Ueno ,  Kouichi Kumamaru ,  Masahiro Shiihara ,  Kouichi Bairin ,  Takashi Haruguchi ,  Kiyoshi Hibino

IPC: G01S17/10 ,  G01S7/481 ,  G02B26/10

CPC classification number: G01S17/10 ,  G01S7/4812 ,  G01S7/4814 ,  G01S7/4817 ,  G02B26/10

Abstract: A distance measurement device includes: a mirror disposed so as to be tilted relative to a rotation center axis; a drive unit configured to rotate the mirror about the rotation center axis; a photodetector configured to detect reflected light, of laser light, reflected in a distance measurement region; and a condensing lens disposed on the rotation center axis and configured to condense the reflected light reflected by the mirror, on the photodetector. The mirror has a shape elongated in one direction and is disposed such that a short axis thereof is tilted relative to the rotation center axis in a direction parallel to a plane including the rotation center axis. A width in a short-axis direction of the mirror is smaller than a width of a lens portion of the condensing lens as viewed in a direction parallel to the rotation center axis.