Abstract: An optical film has a thickness of from 20 to 60 ?m, contains a cyclic olefin resin, and satisfies the following conditions (1) to (3): 0?Re?75??(1) 20?Rth?255??(2) 200?D?1000??(3) where Re is an in-plane retardation at a wavelength of 590 nm; Rth is a retardation in a thickness direction at a wavelength of 590 nm; and D is a moisture permeability at 40° C. and 90% RH.

Abstract: In an optical connector for connecting an optical fiber to a mating object having a pair of guide members, the optical connector includes a connector body fixed to the optical fiber and an adapter removably attached to the connector body. The adapter has a positioning groove for positioning an end portion of the optical fiber and a pair of guide grooves adapted to receive the guide members, respectively.

Abstract: In an optical connector, a holding member is coupled to a ferrule and attached to a housing. The ferrule has a flange portion brought into contact with the contact surface. The ferrule is adapted to receive an optical fiber. The housing has a contact surface and an engaging surface faced inward with respect to each other in an optical axis direction. The holding member includes a cylindrical main body for receiving the ferrule inserted therein, a first engaging portion connected to the main body and engaged with the engaging surface, and a second engaging portion connected to the main body and engaged with the flange portion, the second engaging portion being elastically deformable.

Abstract: An optical connector comprises a clamp member holding an optical fiber, a first housing to which the clamp member is fixed, and a second housing fitted to the first housing. The first housing has an aligning portion for aligning and positioning the optical fiber, and a clamp holding portion holding the clamp member. The optical fiber has an end portion protruding forward from the aligning portion in a cantilevered state.

Abstract: For connecting an optical fiber having a fiber axis and an axial end portion provided with a chamfered surface having a predetermined angle with respect to the fiber axis, the optical connector includes an aligning member and a holding plate. The aligning member has a principal surface and a side surface adjacent to the principal surface. The aligning member has a fiber-receiving groove for receiving the axial end portion of the optical fiber. The fiber-receiving groove extends along the principal surface in a predetermined direction and has end portions each opening on the side surface. The holding plate is faced to the principal surface and covers the fiber-receiving groove. The holding plate has a first slant surface beside one of end portions of the fiber-receiving groove. The first slant surface has an angle with respect to the principal surface. The first angle is determined smaller than the predetermined angle.

Abstract: In an optical connector including an optical connector plug holding a first optical fiber and an optical connector plug holding a second optical fiber, the optical connector plugs cooperates with each other to obtain a connected state in which exposed longitudinal ends of the first and the second optical fibers are brought into contact with each other. The first optical fiber includes a long fiber portion and a short fiber portion higher in breakage resistance than the long fiber portion. One of the longitudinal ends of the short fiber is fused to one of longitudinal ends of the long fiber portion. Another of the longitudinal ends of the short fiber portion is exposed to serve as one of the exposed longitudinal ends.

Abstract: In a fixing tool for fixing a fiber holding member to an optical fiber, a tool body receives the optical fiber and the fiber holding member. In this event, the fiber holding member is disposed on a first specific part of the optical fiber. A positioning device fixes a second specific part of the optical fiber to the tool body in the state where the optical fiber and the fiber holding member are received in the tool body. The second specific part is a portion between the first specific part and a longitudinal end face of the optical fiber.

Abstract: In an optical connector for use in connecting an optical fiber, a housing defines an optical axis extending in a predetermined direction. For positioning the optical fiber along the optical axis, a ferrule is accommodated in the housing to be movable in the predetermined direction. The housing further accommodates a fixing member engaged with the housing in the predetermined direction. Between the ferrule and the fixing member, an elastic member is interposed to urge the ferrule towards one side in the predetermined direction. In addition, the housing has a guide groove extending in the predetermined direction. The fixing member has a guide portion protruding through the guide groove to the outside of the housing.

Abstract: In an optical connector, a holding member is coupled to a ferrule and attached to a housing. The ferrule has a flange portion brought into contact with the contact surface. The ferrule is adapted to receive an optical fiber. The housing has a contact surface and an engaging surface faced inward with respect to each other in an optical axis direction. The holding member includes a cylindrical main body for receiving the ferrule inserted therein, a first engaging portion connected to the main body and engaged with the engaging surface, and a second engaging portion connected to the main body and engaged with the flange portion, the second engaging portion being elastically deformable.

Abstract: In an optical connector for connecting an optical fiber to a mating object having a pair of guide members, the optical connector includes a connector body fixed to the optical fiber and an adapter removably attached to the connector body. The adapter has a positioning groove for positioning an end portion of the optical fiber and a pair of guide grooves adapted to receive the guide members, respectively.

Abstract: In a clamping member for mounting an optical connector pair connected to each other in a first direction to an object, the clamping member includes a connector receiving portion for receiving the optical connector pair and a fixing portion to be fixed to the object. In addition, a coupling portion is provided to the clamping member for coupling the connector receiving portion and the fixing portion. The coupling portion separates the connector receiving portion from the object by a first dimension in a second direction perpendicular to the first direction.

Abstract: In a fixing tool for fixing a fiber holding member to an optical fiber, a tool body receives the optical fiber and the fiber holding member. In this event, the fiber holding member is disposed on a first specific part of the optical fiber. A positioning device fixes a second specific part of the optical fiber to the tool body in the state where the optical fiber and the fiber holding member are received in the tool body. The second specific part is a portion between the first specific part and a longitudinal end face of the optical fiber.

Abstract: There is provided an optical fiber end face cleaner which is easy to carry and make preparations for use, facilitates cleaning operation, and what is more, makes it possible to positively remove or clear away attached materials from end faces of optical fibers without causing any of the removed materials to adhere to the end faces again. The optical fiber end face cleaner includes at least one elastic base formed by an elastic member having a flat surface of a predetermined size, and a predetermined thickness in a direction perpendicular to the surface. An adhesive layer is formed on a surface of the elastic base, for allowing the end faces of the optical fibers to be pressed against the adhesive layer to cause deposits on the end faces to adhere to the adhesive layer for removal.

Abstract: An optical connector includes a housing including a coupling portion for coupling another optical connector and a blocking component for blocking an optical axis arranged in the coupling portion. The blocking component has a shutter plate blocking the optical axis and being pivotably supported by the housing with a pivot shaft and an elastic portion for normally biasing the shutter plate to a closed position. The shutter plate pivots between a position blocking the optical axis and a position to which the shutter plate is forced to move by the other optical connector when the other optical connector is inserted into the optical connector.

Abstract: For connecting an optical fiber having a fiber axis and an axial end portion provided with a chamfered surface having a predetermined angle with respect to the fiber axis, the optical connector includes an aligning member and a holding plate. The aligning member has a principal surface and a side surface adjacent to the principal surface. The aligning member has a fiber-receiving groove for receiving the axial end portion of the optical fiber. The fiber-receiving groove extends along the principal surface in a predetermined direction and has end portions each opening on the side surface. The holding plate is faced to the principal surface and covers the fiber-receiving groove. The holding plate has a first slant surface beside one of end portions of the fiber-receiving groove. The first slant surface has an angle with respect to the principal surface. The first angle is determined smaller than the predetermined angle.

Abstract: A splice module for optically interconnecting ends of first and second optical fibers (200, 300), each of which has a predetermined radius (Rf). The splice module comprises first and second plates (20, 30), both of which are made of silicon. The first plate 20 is provided with grooves (22). The second plate (30) is arranged on the first plate (20) to cover the grooves (22) and to define passage ways (26) for receiving and aligning the ends of the first and the second optical fibers (200, 300). The passage way (26) has an inscribed circle (28), which has a radius (Ri) larger than the predetermined radius (Rf) by a predetermined difference (D) between 0.5 ?m and 1.0 ?m, both inclusive.

Abstract: An optical connector comprises a clamp member holding an optical fiber, a first housing to which the clamp member is fixed, and a second housing fitted to the first housing. The first housing has an aligning portion for aligning and positioning the optical fiber, and a clamp holding portion holding the clamp member. The optical fiber has an end portion protruding forward from the aligning portion in a cantilevered state.

Abstract: In an optical connector, an end face (12) of an optical fiber (11) is brought into contact with an end face of a mating connector in a predetermined direction (13) to achieve connection. The optical connector includes a housing (14) provided with an aligning portion (16) having a hole (15) for insertion of the optical fiber, and a holding portion (21) for holding the optical fiber. The holding portion (21) is movable in the predetermined direction. The holding portion is fixed to the housing with the optical fiber inserted into the hole in the aligning portion and serves to adjust the amount of protrusion of the optical fiber from an end face (22) of the aligning portion. The housing is provided with a guide portion (17) for guiding the optical fiber to the hole in the aligning portion.

Abstract: There is provided an optical fiber end face cleaner which is easy to carry and make preparations for use, facilitates cleaning operation, and what is more, makes it possible to positively remove or clear away attached materials from end faces of optical fibers without causing any of the removed materials to adhere to the end faces again. The optical fiber end face cleaner includes at least one elastic base formed by an elastic member having a flat surface of a predetermined size, and a predetermined thickness in a direction perpendicular to the surface. An adhesive layer is formed on a surface of the elastic base, for allowing the end faces of the optical fibers to be pressed against the adhesive layer to cause deposits on the end faces to adhere to the adhesive layer for removal.

Abstract: There is provided a connector which is capable of routing a flat cable in a desired arbitrary direction and at the same time preventing the flat cable from being broken. A concave portion is formed in a housing, and a convex portion is formed on a cable-holding member for being slidably fitted in the concave portion. Slits are formed in the concave portion, and projections to be engaged with the slits are formed on the cable-holding member. Thus, directions of rotations of the cable-holding member are restricted such that the cable-holding member can rotate only about a first axis extending in a direction of width of the flat cable and a second axis orthogonal to the first axis and extending in a direction of insertion of the flat cable.