| 摘要 |
This invention provides a space-saving position sensor. 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 position sensor 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. |
