Patent ID: 8737781

Claim:
An optical waveguide, comprising: a first cladding layer; a core layer formed on the first cladding layer and in which an opening portion is provided in an end side of a light path; a light path conversion component including a resin cubic member formed of an opaque resin, including a substrate portion, and a protruding portion provided on a center part of the substrate portion, and the protruding portion formed of a horizontal putting triangular post shape having a light path conversion inclined surface and a vertical sidewall surface which intersects with the light path conversion inclined surface; and a metal layer serving as a light path conversion mirror, and covering the light path conversion inclined surface and the sidewall surface of the protruding portion and a surface of the substrate portion, wherein the metal layer formed on the surface of the substrate portion of the light path conversion component contacts an upper face of the core layer, and the metal layer formed on the sidewall surface of the protruding portion of the light path conversion component contacts a side wall of the opening portion of the core layer; and a second cladding layer covering the first cladding layer, the core layer and the substrate portion of the light path conversion component, wherein a light path of a light that propagates through the core layer is converted toward the first cladding layer side by the light path conversion mirror.