Patent ID: 6198862
Filing Date: 2001-03-06
Classification: G01B,G01S

Abstract:
An optical position detector comprising:a substrate;an input optical fiber disposed in a fixed position on the substrate by a guide for introducing light from an external light source;output optical fibers disposed in a fixed position on the substrate by the guide for outputting the light to an external optical detection means;a slab light guide disposed on the substrate for supporting and guiding said input optical fiber and said output optical fibers, for diverting an optical path of light output from said input optical fiber and for outputting the light, said slab light guide further diverting an optical path of light reflected from a surface to be detected and guiding the light reflected to the output optical fibers through a branched light guide;a first cylindrical lens disposed adjacent to said slab light guide for diverting an optical path of light output from said slab light guide and for condensing the light on the surface to be detected; anda second cylindrical lens disposed adjacent to said slab light guide for diverting the optical path of light reflected from the surface to be detected and guiding the light reflected from the surface to be detected to said slab light guide.