Patent ID: 6893163
Filing Date: 2005-05-17
Classification: G02B

Abstract:
1. An optical connection sleeve which is formed taking an optical axis of optical connection as a central axis and is a resin-made sleeve for optically connecting an optical fiber inserted from one end portion with respect to the central axis with an optical component disposed on other end portion, comprising: a ferrule insertion portion in which at least a part of an inner peripheral surface thereof serves as a ferrule fixing surface for positioning and fixing a ferrule which is provided on a tip of the optical fiber inserted as an object of optical connection from an opening, said ferrule insertion portion including the opening provided in the one end portion, wherein a cross section of said ferrule fixing surface on a plane vertical to the optical axis has a polygonal shape surrounding the ferrule to be inserted, and a face shape of the ferrule fixing surface as a whole has a multifaceted shape constituted by N faces (N is an integer no fewer than 3) in which N sides in the polygonal cross section extend along the optical axis, and in the cross section of said ferrule fixing surface, a diameter of a circumscribed circle of the polygonal shape is larger than a diameter of the ferrule, and a diameter of an inscribed circle of the polygonal shape is smaller than a diameter of the ferrule, in a condition that the ferrule is not inserted into the ferrule insertion portion.