Title:
光導波路、光導波路モジュール、および電子機器
Document Type and Number:
Japanese Patent JP5233990
Kind Code:
B2
Abstract:
This invention provides a light guide (4) including a core (10) and a clad (11) being made of a material having an index of refraction different from an index of refraction of the core (10) and covering the core (10), a light incident surface (4A) and a light exit surface (4B), which are end faces of the core (10) and the clad (11), being formed as inclined surfaces so that an orthogonal projection to a plane (X-Y plane) orthogonal to an extending direction (Z direction)of the light guide (4) has a rectangular shape and being inclined at a predetermined angle in a direction (Z direction) of moving away from the end face, a light applied from a light emitting portion being introduced into the core (10) by being reflected at the light incident surface (4A) and a light transmitted through the core (10) being exit to outside by being reflected at the light exit surface (4B); wherein at least one of the light incident surface (4A) or the light exit surface (4B) of the core (10) is arranged while shifted in parallel without changing respective inclined angles so that the inclined surface is divided into a plurality of inclined surfaces parallel in a longitudinal direction (X direction) of the rectangular shape in the orthogonal projection and the plurality of inclined surfaces closer to the light emitting portion are positioned in a direction (Z direction) of moving away from the end face to be in a shape extending in the direction (Z direction) of moving away from the end face in a stepwise manner as a whole. Thus, a light guide capable of reducing loss of light in light transmission and enabling stable light transmission with a simple configuration is provided.
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Inventors:
Yukari Terakawa
Hayami Hosokawa
Hayami Hosokawa
Application Number:
JP2009505193A
Publication Date:
July 10, 2013
Filing Date:
March 14, 2008
Export Citation:
Assignee:
OMRON Corporation
International Classes:
G02B6/42; G02B6/122
Domestic Patent References:
| JPH04346301A | 1992-12-02 | |||
| JP2000137138A | 2000-05-16 | |||
| JP2007164091A | 2007-06-28 |
Foreign References:
| US20050036728A1 | 2005-02-17 | |||
| WO2007026843A1 | 2007-03-08 | |||
| US20050036728A1 | 2005-02-17 |
Attorney, Agent or Firm:
Yoshihisa Masui
Jun Himura
Jun Himura