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：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.

公开(公告)号：US11047981B2

公开(公告)日：2021-06-29

申请号：US16038210

申请日：2018-07-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takashi Haruguchi ,  Toshihiro Koga ,  Masaharu Fukakusa

IPC: G01C3/08 ,  G01S17/08 ,  G01S7/481 ,  G01S7/4865 ,  G01S17/42

Abstract: There is provided a distance measurement device that can successfully take in reflected light from a distance measurement area, and at the same time, can achieve compactness of the distance measurement device. The distance measurement device includes a fixed part, a rotating part that is rotatably disposed on the fixed part, a laser light source that is disposed in the fixed part, and a photodetector that is disposed in the fixed part. The distance measurement device further includes a beam splitter that is disposed in the fixed part and separates an optical path of projection light emitted from the laser light source from an optical path of reflected light reflected by a distance measurement area and an imaging lens that is disposed in a common optical path of projection light and reflected light and is used for taking in reflected light reflected by the distance measurement area.