| 摘要 |
When inputting character information or other information with an input body such as a pen, this position sensor does not detect unwanted parts such as the little finger of the hand holding the input body or the base part of said finger, but does detect desired parts, such as the pen tip, with high sensitivity. This position sensor is provided with a sheet-form optical waveguide (W) which comprises a lattice-form core (2) held between an undercladding layer (1) and an overcladding layer (3), a light emitting element (4) which is connected to one end surface of the core (2), and a light receiving element (5) which is connected to the other end surface of the core (2). The modulus of elasticity of the core (2) is set to be greater than the modulus of elasticity of the undercladding layer (1) and the overcladding layer (3), and projections (T) are provided in areas on the surface of the undercladding layer (1) opposite of the surface supporting the core (2), corresponding to areas of the core (2) between adjacent intersections in the lattice-form core (2). |
