Patent ID: 8660389

Claim:
An optical connector comprising; a tube; optical fibers configured to be inserted into a lumen of the tube from both sides of the tub; a first structure configured to hold one of the optical fibers in a non-rotating condition relatively to the tube; and a second structure configured to hold the other of the optical fibers in a rotatable condition relatively to the tube, wherein an end of one of the optical fiber and an end of the other of the optical fiber are separated in the lumen to form a gap between the ends, and one of the optical fibers and the other of the optical fibers are optically connected through the gap, the optical connector further comprises: a connecting section for connecting an exterior space of the tube and the gap, wherein the exterior space, the gap, and the connecting section hold liquid or fluid composed of a material which can transmit light; and a structure configured to hold the liquid or the fluid on the exterior space.