Title:
POSITION SENSOR
Document Type and Number:
WIPO Patent Application WO/2016/031539
Kind Code:
A1
Abstract:
This invention provides a position sensor that makes it possible to save space and improve the sensitivity with which pressure positions are detected. Said position sensor contains a sheet-shaped optical waveguide W, and said optical waveguide W comprises a sheet-shaped core-pattern member sandwiched between a lower cladding layer 1 and an upper cladding layer 3. The core-pattern member has a grid section 2A and periphery sections 2B. The grid section 2A comprises a plurality of linear cores 2, and the periphery sections 2B extend from the cores 2 in the grid section 2A and are laid out along the perimeter of the grid section 2A. The section of the surface of the upper cladding layer 3 corresponding to the grid section 2A of the core-pattern member serves as an input region 3A, and at least parts of edge sections F of the optical waveguide W, which correspond to the periphery sections 2B of the core-pattern member, are folded over to the back of the optical waveguide W. The indices of refraction of the upper cladding layer 3, the lower cladding layer 1, and the core 2 are set such that the core 2 has the highest index of refraction, followed by the lower cladding layer 1 and then the upper cladding layer 3.
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Inventors:
YOSHIOKA RYOMA (JP)
SHIMIZU YUSUKE (JP)
SHIBATA NAOKI (JP)
SHIMIZU YUSUKE (JP)
SHIBATA NAOKI (JP)
Application Number:
PCT/JP2015/072594
Publication Date:
March 03, 2016
Filing Date:
August 10, 2015
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G06F3/042; G02B6/12; G02B6/125
Foreign References:
| JP2014016939A | 2014-01-30 | |||
| JP2009545828A | 2009-12-24 | |||
| JP5513656B1 | 2014-06-04 |
Attorney, Agent or Firm:
SAITOH Yukihiko et al. (JP)
Masahiko Nishifuji (JP)
Masahiko Nishifuji (JP)
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