| 摘要 |
PROBLEM TO BE SOLVED: To provide a position sensor capable of preventing a light-receiving element from detecting light from outside.SOLUTION: A position sensor A includes: a sheet-like optical waveguide W in which a plurality of linear cores 2 are arranged in a grid on a surface of a sheet-like underclad layer 1, and an overclad layer 3 is formed into a sheet-like shape while covering the cores 2; a light-emitting element 4 connected to one end face of each core 2; and a light-receiving element 5 connected to the other end face of each core 2. An entire surface of an outer face of the optical waveguide W and an entire surface of an outer face of the light-receiving element 5 are covered with the light-shielding sheet S that shields light of wavelength that can be recognized by the light-receiving element 5. |
