Patent ID: 6987906

Claim:
An optical connection device for optically coupling at least one optical waveguide in which light propagates to at least one optical element disposed outside the optical waveguide, the optical connection device comprising: the optical waveguide provided in a board so that an optical axis thereof is parallel with a board surface, a part of the optical waveguide being removed so as to form a groove along a plane angled at a predetermined angle to the optical axis of the optical waveguide; the optical element opposing the groove of the optical waveguide so that an optical axis of the optical element intersects with the optical axis of the optical waveguide; and an optical unit arranged at a position of intersection of the optical axes of the optical element and the waveguide for turning light by reflection from one of the optical axes of the waveguide and the optical element along the other of the optical axes; wherein the optical unit is fitted to the groove such that a surface of the optical unit is guided by a surface of the groove.