Abstract: An adapter includes a tubular body having a tubular shape and surrounding a pair of ferrules over half a circumference or more with a ling along a first direction as an axis. The tubular body includes a guide extending in the first direction and engaging with side surfaces of the ferrule, and a slit formed from one end to the other end in the first direction.

Abstract: A ferrule includes a first end surface and a second end surface, an outer surface, an accommodating part, a plurality of guide grooves, a window part, and a pressing part. The plurality of guide grooves are provided to each extend in the first direction on an inner wall of the accommodating part and be aligned in a second direction intersecting the first direction. The window part opens at the outer surface and is connected to the accommodating part. The pressing part is disposed in the window part to press the plurality of optical fibers toward the plurality of guide grooves. The window part is provided at a position facing at least a portion of the plurality of guide grooves. The pressing part can be fitted into the window part so that a gap is provided between an inner wall of the window part and the pressing part.

Abstract: A ferrule includes a first end surface and a second end surface, an outer surface, an accommodating part, a plurality of guide grooves, and a first window part and a second window part. The plurality of guide grooves are provided to each extend in the first direction on an inner wall of the accommodating part and be aligned in a second direction intersecting the first direction. The first window part and the second window part open at the outer surface and are connected to each other through the accommodating part. The first window part is positioned on the first end surface side with respect to the second window part. The first window part is provided at a position through which at least a portion of the guide grooves are visually noticeable.

Abstract: A ferrule includes an optical fiber holding portion configured to hold a plurality of optical fibers, and a first side surface and a second side surface facing each other in a second direction intersecting a first direction in which the optical fiber holding portion extends. The first side surface is provided with a first recessed portion or a first protruding portion extending along the first direction. The second side surface is provided with a second recessed portion or a second protruding portion extending along the first direction. In this ferrule, the first recessed portion or the first protruding portion includes a first positioning portion and a second positioning portion separated from each other in the first direction.

Abstract: A ferrule includes: a tip surface; an opening portion provided on a side opposite to the tip surface in a first direction intersecting the tip surface; a plurality of fiber grooves extending along the first direction and arranged along a second direction intersecting the first direction between the tip surface and the opening portion, the plurality of fiber grooves being capable of respectively supporting a plurality of optical fibers; and a plurality of lenses respectively disposed on extension lines of the plurality of fiber grooves. The fiber groove has a first fiber groove portion for positioning the optical fiber with respect to the lens and a second fiber groove portion for introducing the optical fiber into the first fiber groove portion. The first fiber groove portion is disposed closer to the lens than the second fiber groove portion in the first direction.

Abstract: An optical connector ferrule according to an embodiment includes an MT ferrule, and a spacer mounted on an optical end surface of the MT ferrule and having a guide hole into which a guide pin is inserted. The spacer has a contact surface that contacting the counterpart connector and a recess surrounded by the contact surface. The spacer includes a lens part exposed on a bottom surface of the recess and optically coupled to the optical end surface of the MT ferrule and a base part that retains the lens part by surrounding the lens part. The material of the lens part and the material of the base part are different from each other, and the difference between the linear expansion coefficient of the base part and the linear expansion coefficient of the MT ferrule is 0.5×10?5/° C. or less.

Abstract: An optical connector ferrule according to an embodiment includes an MT ferrule, and a spacer mounted on an optical end surface of the MT ferrule and having a guide hole into which a guide pin is inserted. The spacer has a contact surface that contacting the counterpart connector and a recess surrounded by the contact surface. The spacer includes a lens part exposed on a bottom surface of the recess and optically coupled to the optical end surface of the MT ferrule and a base part that retains the lens part by surrounding the lens part. The material of the lens part and the material of the base part are different from each other, and the difference between the linear expansion coefficient of the base part and the linear expansion coefficient of the MT ferrule is 0.5×10?5/° C. or less.

Abstract: A photoelectric composite cable includes an optical fiber unit including at least one optical fiber and a cylindrical member, the cylindrical member including a resin tape wrapped to cover a periphery of the optical fiber, the resin tape being loosely wrapped with respect to the optical fiber, a plurality of electric wires arranged on an outer side of the cylindrical member, and a sheath covering outer peripheries of the optical fiber unit and the electric wires.

Abstract: A cable with connectors includes a plurality of electric wires arranged in parallel, and a first connector and a second connector provided at each end of the electric wires. The first connector includes a first substrate accommodated therein and a connector plug connected to the first substrate. The second connector includes a second substrate accommodated therein and a connector plug connected to the second substrate. The first substrate and the second substrate have a plurality of first contact points arranged at one end-side thereof and to be connected with the electric wires, respectively. The plurality of first contact points is arranged so that am arrangement order of the plurality of first contact points provided on the first substrate and an arrangement order of the plurality of first contact points provided on the second substrate are mirror-symmetric with the electric wires being interposed therebetween.

Abstract: A cable with connectors includes a plurality of electric wires arranged in parallel, and a first connector and a second connector provided at each end of the electric wires. The first connector includes a first substrate accommodated therein and a connector plug connected to the first substrate. The second connector includes a second substrate accommodated therein and a connector plug connected to the second substrate. The first substrate and the second substrate have a plurality of first contact points arranged at one end-side thereof and to be connected with the electric wires, respectively. The plurality of first contact points is arranged so that am arrangement order of the plurality of first contact points provided on the first substrate and an arrangement order of the plurality of first contact points provided on the second substrate are mirror-symmetric with the electric wires being interposed therebetween.

Abstract: Provided is a mounting structure for an optical component, including: an optical component having at least one of a reflective surface which reflects light, and a transmissive surface which transmits light; a base member having a placement surface configured to place the optical component thereon; and an adhesive layer interposed between the optical component and the placement surface of the base member to fixedly bond the optical component and the placement surface together. The adhesive layer includes a filler, and the filler is present substantially as a monolayer between the optical component and the placement surface.