OPTICAL SIGNAL TRANSMISSION DEVICE AND ELECTRONIC APPARATUS USING SAME

WIPO Patent Application WO/2016/132761

A1

[Problem] To achieve reductions in size, diameter and cost while supplying a stable received light amount to a light receiving element in two-way communication using an optical signal. [Solution] A rotary joint 10 is provided with: a fixed part 20 and a rotating part 30 which are approximately orthogonal to a central axis X and disposed to face each other; and an approximately cylindrical light-guiding member 40 disposed therebetween. In the fixed part 20, a light-emitting element 22 and a light-receiving element 24 are provided, and in the rotating part 30, a light-receiving element 34 which receives light emitted from the light-emitting element 22, and a light-emitting element 32 which emits light to the light-receiving element 24 are provided. An intersection point C of the fixed part 20 with the central axis X is located in an approximately central part of a straight line LA connecting the light-emitting element 22 and the light-receiving element 24, and an intersection point C' of the rotating part 30 therewith is located in an approximately central part of a straight line LB connecting the light-emitting element 32 and the light-receiving element 34. Light emitted from each of the light-emitting elements 22, 32 is reflected in the light-guiding member 40 and thereby a stable received light amount is supplied to the light-receiving elements 24, 34.

KAKIMOTO HIROYA (JP)

PCT/JP2016/050478

August 25, 2016

January 08, 2016

Click for automatic bibliography generation  

TAIYO YUDEN KK (JP)

H04B10/80; G02B6/43; G03B15/00; G03B17/56; H01L31/12; H04N5/225

JP2008154207A	2008-07-03
JP2012119890A	2012-06-21
JP2013034043A	2013-02-14
JP2009130803A	2009-06-11
US20070140620A1	2007-06-21

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