公开(公告)号：US09447933B2

公开(公告)日：2016-09-20

申请号：US14598030

申请日：2015-01-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshikazu Onishi ,  Kazuhiko Yamanaka ,  Takuma Katayama

IPC: F21K99/00 ,  H04B10/116 ,  B82Y20/00 ,  F21V13/02 ,  H01S5/02 ,  H01S5/042 ,  H01S5/183 ,  H01S5/343 ,  H01S5/42 ,  H01S5/00

CPC classification number: F21K9/90 ,  B82Y20/00 ,  F21V13/02 ,  H01S5/0078 ,  H01S5/0216 ,  H01S5/0425 ,  H01S5/18369 ,  H01S5/34333 ,  H01S5/423 ,  H04B10/116

Abstract: A visible light communication system includes a light transmitter including a group III nitride semiconductor laser element and a wavelength converter provided to face a light exit surface of the nitride semiconductor laser element and containing a fluorescent material. The visible light communication system further includes a wavelength filter configured to remove light emitted from the fluorescent material and a light receiving element configured to receive light emitted from the group III nitride semiconductor laser element via the wavelength filter.

Abstract translation: 可见光通信系统包括：光发射机，其包括III族氮化物半导体激光元件和设置为面对氮化物半导体激光元件的光出射面并含有荧光材料的波长转换器。 可见光通信系统还包括：波长滤波器，被配置为去除从荧光材料发射的光;以及光接收元件，被配置为经由波长滤光器接收从III族氮化物半导体激光元件发射的光。

公开(公告)号：US11982550B2

公开(公告)日：2024-05-14

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 having a plurality of reflection structures repeatedly formed and code including light reflector; irradiator that irradiates the plurality of reflection structures with light; and light receiver that receives light reflected by the plurality of reflection structures. Each of the plurality of reflection structures has a surface in a convex shape, and each of the plurality of reflection structures has a width that is an integral multiple of a width of light reflector.

公开(公告)号：US11467261B2

公开(公告)日：2022-10-11

申请号：US16603142

申请日：2017-04-21

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shinzo Koyama ,  Akihiro Odagawa ,  Takuma Katayama ,  Tsuyoshi Tanaka

IPC: G01S17/10 ,  G01S7/481 ,  G01S7/4861 ,  G01S17/89

Abstract: A distance measuring device that measures a distance to an object. The distance measuring device includes: a light source that emits pulsed light; a reflector that reflects and radiates, as radiation light, the pulsed light emitted from the light source, and reflects object light that is the radiation light reflected by the object and returning; and an imager that captures the object light reflected by the reflector. The pulsed light emitted from the light source is diffused light. The light source and the imager are located to face the reflector. The reflector radiates, as the radiation light, light in a shape with a long axis and a short axis. The imager performs exposure in synchronization with the pulsed light to image the object light.