公开(公告)号：US20190041515A1

公开(公告)日：2019-02-07

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: G01S17/08 ,  G01S7/486 ,  G01S7/481

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.

公开(公告)号：US20230358574A1

公开(公告)日：2023-11-09

申请号：US18044215

申请日：2021-10-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHUICHI NAGAI ,  MASARU SHIRAISHI ,  JUNYA ASO ,  TOSHIHIRO KOGA ,  TAKUMA KATAYAMA

IPC: G01D5/347

CPC classification number: G01D5/3473

Abstract: Provided is an encoder capable of achieving high position resolution without being finely divided, and capable of detecting a rotation angle or the like with high sensitivity. The encoder includes: rotary plate (2) having a plurality of reflection structures (10) repeatedly formed and code (20) including light reflector (21); irradiator (4) that irradiates the plurality of reflection structures (10) with light; and light receiver (5) that receives light reflected by the plurality of reflection structures (10). Each of the plurality of reflection structures (10) has a surface in a convex shape, and each of the plurality of reflection structures (10) has a width that is an integral multiple of a width of light reflector (21).

公开(公告)号：US20190120960A1

公开(公告)日：2019-04-25

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: G01S17/10 ,  G01S7/487

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.