Patent ID: 7286733

Claim:
A light guide body comprising: at least a first taper portion including one end with a first end face connectable to an optical fiber and the other end, the one end being thinner than the other end; a plurality of second taper portions, each including one end with an second end face connectable to an optical fiber and the other end, one end of the second taper portion being thinner than the other end of the second taper portion; and a main body connected to the other ends of the first and second taper portions, wherein a thickness of the first taper portion is equal to a thickness of the main body in a direction therethrough, wherein a thickness of the plurality of second taper portions is equal to the thickness of the main body in the direction therethrough; and wherein the first end face is a circle and the first taper portion includes a plurality of types of surfaces between the one end and the other end thereof, a first one of the types is planar surfaces, extending between the one end to the other end thereof, arranged in parallel to each other in a thickness direction perpendicular to the direction, and a second one of the types is curved surfaces, extending from the circle of the first end face to the other end of the first taper portion, arranged in a width direction perpendicular to the direction and the thickness direction.