Abstract: A ferrule of the present invention includes a ferrule body including an optical transmission member holding part, the optical transmission member holding part being configured to hold a plurality of optical transmission members; and an optical transmissive member including an optical surface disposed opposite to front end surfaces of the plurality of optical transmission members held by the optical transmission member holding part, the optical transmissive member being configured to transmit light emitted from the plurality of optical transmission members. The ferrule body includes a first fitting part and a first coupling hole, the first coupling hole being configured to receive a coupling member. The optical transmissive member includes a second fitting part configured to be fitted with the first fitting part, and a second coupling hole through which the coupling member received by the first coupling hole is provided.

Abstract: An optical receptacle includes a first optical surface, a second optical surface, and an annular first cylindrical part disposed to surround a second central axis of the second optical surface. The first cylindrical part includes a first inner surface with a circular shape in a cross section perpendicular to the second central axis, and a second inner surface disposed on a second optical surface side than the first inner surface and provided with a circular shape in the cross section perpendicular to the second central axis. A diameter of the first inner surface is greater than a diameter of the second inner surface, and a length of the second inner surface in a direction along the second central axis is 0.5 to 4.0 mm.

Abstract: A ferrule includes: an optical transmission member alignment part for aligning optical transmission members extending in the first direction in one line in the second direction; a first surface for incidence of light from the optical transmission members; a second surface for emitting outside light entering from the first surface; and an optical transmission member insertion part disposed opposite to the first surface with respect to the optical transmission member alignment part, and including a contact portion where the optical transmission members are touchable. When the opening side and the opposite side are set as plus and minus sides, respectively, with respect to the optical transmission member alignment part in the third direction, the contact portion is disposed to come closer to the minus side with increasing distance from the first surface.

Abstract: An optical connector includes optical transmission members and a ferrule. The ferrule includes an alignment part for aligning the optical transmission members in a first direction; a first surface disposed to face the end surface of the aligned optical transmission members and for allowing incidence of light emitted from the optical transmission members; a second surface for allowing emission of the light incident on the first surface to the outside; a recess, disposed between the alignment part and the first surface and including a non-contact region corresponding to the end portion of the aligned optical transmission members, where the optical transmission members are disposed without contacting the non-contact region; and a lid for adjusting the position of the end surface of the optical transmission members with respect to the first surface by pressing the optical transmission members with a pressing surface contacting the optical transmission members.

Abstract: An optical receptacle includes: a first optical surface configured to allow, to enter the optical receptacle, light emitted from the photoelectric conversion element package, or emit, toward the photoelectric conversion element package, light travelled inside the optical receptacle; a second optical surface configured to emit, toward the optical transmission member, the light travelled inside the optical receptacle, or allow, to enter the optical receptacle, light emitted from the optical transmission member; a cylindrical part configured to house at least a part of the photoelectric conversion element package such that the first optical surface and the photoelectric conversion element face each other; and a first groove part disposed at a periphery of the first optical surface.

Abstract: A ferrule includes an optical transmission member holding member configured to hold an optical transmission member; and a ferrule main body to which the optical transmission member holding member is inserted. The ferrule main body includes an insertion part to which the optical transmission member holding member is inserted, a first optical surface disposed to face an end surface of the optical transmission member held by the optical transmission member holding member, and a positioning part configured to set a position of the optical transmission member holding member when the optical transmission member holding member is inserted to the insertion part.

Abstract: An optical receptacle includes an optical receptacle main body and a cylindrical fixing member. The optical receptacle main body includes a first optical surface, a second optical surface, and an annular groove disposed to surround a first central axis of the first optical surface or disposed to surround a second central axis of the second optical surface. The fixing member is configured with a material with a smaller linear expansion coefficient than that of the optical receptacle main body, and is fit to the groove so as to be in contact with at least a part of an inner surface of the groove.

Abstract: A ferrule includes a holding part, a first surface and a second surface. The holding part includes a first holding recess including the first surface and a third surface facing the first surface, a first wall, at least one through hole that is open at the third surface and a fourth surface, the fourth surface being located on a side on which the plurality of optical transmission members is inserted, and a plurality of first grooves disposed at the first holding recess along an extending direction of the plurality of optical transmission members, the plurality of optical transmission members inserted to the at least one through hole is respectively disposed at the plurality of first grooves.

Abstract: An optical connector production device of the present invention is configured to produce an optical connector that includes a ferrule and a first optical transmission member. The production device includes a jig body, and a fixing part which allows the ferrule to fit thereto to hold the ferrule and which is disposed in the jig body.

Abstract: A ferrule includes a holding part, a first surface, and a second surface. The holding part includes a holding recess, a first groove disposed at the holding recess along an extending direction of the optical transmission member, the first groove being a groove where the optical transmission member is disposed, a pressing member configured to press the optical transmission member toward the first groove, and a sliding part disposed at the holding recess and the pressing member, and configured to slide the pressing member with respect to the holding recess along the extending direction of the optical transmission member.