| 摘要 |
Provided is a position sensor able to detect an input position normally (exactly as inputted) even if a surface is equipped with a protective film. This position sensor comprises: a sheet-shaped optical waveguide (W) wherein a grid of cores (2) are sandwiched between a sheet-shaped underclad layer (1) and overclad layer (3); a light-emitting element (4) connected to one end surface of linear cores (2) that form the grid of cores (2); and a light-receiving element (5) connected to the other end surface of the linear cores (2). A protective film (S) comprising a resin is positioned on the overclad layer (3), and the arithmetic average roughness Ra of the surface of the protective film (S) in contact with the overclad layer (3) is set to be greater than or equal to 10 µm. |
