Abstract: An optical fiber holder comprising a pair of hollow metal members opposingly provided so as to interpose an optical fiber between them, and a holding case that holds the hollow metal members in such a state that their peripheries are pressed against its inner wall. The hollow metal members are in the shape of half-round cylinders on the whole, and are provided in such a manner that the planar portions thereof face each other so that the optical fiber is held between the hollow members at the center of each planar portion thereof. The optical fiber can be elastically fixed without causing a damage to the optical fiber main body and can be firmly fixed because of the great contact areas assured in the axial direction and in the peripheral direction.

Abstract: An optical shunt device in which a pair of connecting ends (22, 23) for being connected to optical communication fiber sections (11) are divided into three systems. The first of the three systems is a passing-through light conduction path (19) through which light signals in two opposite directions are allowed to pass through between the connecting ends. The second of the three systems is a receiving light conduction path (20) having a first light-receiving end (20a) and a second light-receiving end (20b) each receiving a light signal from the connecting ends (22, 23). The third light path (21) has a first light-transmitting end (21a) and a second light-transmitting end (21b) each transmitting a light signal to the connecting ends.

Abstract: An optoelectrical connector device comprising a first and a second optical terminal connected to a main optical transmission line, a third optical terminal connected to a subsidiary optical transmission line, a first and a second light receiving means, and a first and a second light emitting means. The second light receiving means and the first light emitting means are optically connected to each other, and transmit a signal to a first information processing unit and receive the processed signal from it. The second optical terminal is connected optically to the first light receiving means and the second light emitting means, and transmits a signal to the first information processing unit and receives the processed signal from it. The third optical terminal is connected optically to the first light receiving means and transmits a signal to a second information processing unit.

Abstract: An optical fiber material comprising at least one optical fiber and a wrapping material wrapping at least a part of the peripheral surface of the optical fiber in the axial direction of the optical fiber, wherein in its section taken at right angles to the axis of the optical fiber, the wrapping material holds the optical fiber tightly at its inside surfaces which face the optical fiber in the meridian direction of the optical fiber, or hold it tightly in at least three sites of its inner circumferential surface facing the optical fiber.The present invention provide also processes and devices for preparation thereof.

Abstract: An optical fiber material comprising at least one optical fiber and a wrapping material wrapping at least a part of the peripheral surface of the optical fiber in the axial direction of the optical fiber, wherein in its section taken at right angles to the axis of the optical fiber, the wrapping material holds the optical fiber tightly at its inside surface which face the optical fiber in the meridian direction of the optical fiber, or hold it tightly in at least three sites of its inner circumferential surface facing the optical fiber.The present invention provide also processes and devices for preparation thereof.

Abstract: A two-way connector comprisinga lens,light direction setting means for sending light from a light-transmitting member from one side to the other side of the lens as a light beam parallel to the optical axis,an optical fiber for light transmission and reception having a light transmitting and receiving end on a focal point on one side of the lens,an optical fiber for light reception having a light incoming end and a light outgoing end for conducting light gathered at a position deviated from the focal point of the lens on one side to a light receiving member, anda mirror disposed on the other side of the lens for receiving the light from the optical fiber via the lens and reflecting it to the incoming end of the light-receiving optical fiber via the lens.

Abstract: A fiber fixing device comprising a plurality of metallic tubular members arranged around an optical fiber and a holding member disposed around the tubular members for holding the tubular members in a compressed state. This device is for use in fixing the optical fiber to a plug or the like.

Abstract: An optical connector plug having fitted therein an optical fiber cable comprised of at least one optical fiber and at least an outside jacket covering the optical fiber.The optical connector is formed by accommodating the plugs respectively in housings each including a through hole adapted to receive the second holding portion of the ferrule and means for anchoring the plug at its base portion and connecting them to each other by an adapter having a through hole for receiving the first holding portion of each of the plugs.

Abstract: An optical fiber material comprising at least one optical fiber and a wrapping material wrapping at least a part of the peripheral surface of the optical fiber in the axial direction of the optical fiber, wherein in its section taken at right angles to the axis of the optical fiber, the wrapping material holds the optical fiber tightly at its inside surfaces which face the optical fiber in the meridian direction of the optical fiber, or hold it tightly in at least three sites of its inner circumferential surface facing the optical fiber.The present invention provide also processes and devices for preparation thereof.

Abstract: A receptacle adapted for connection in tight fit with an optical connector plug having a protective guide member surrounding a ferrule accommodating an optical fiber therein and spaced away from the outer circumference of the ferrule. The receptacle comprises at least a first supporting member having a hollow passage capable of receiving the ferrule, and a second supporting member spaced from the first supporting member for receiving and supporting the protective guide member of the ferrule. The plug comprises at least a ferrule containing an optical fiber therein and adapted to be received in the hollow passage of the first supporting member of the receptacle, and a protective guide member surrounding the ferrule at a position spaced away from the outer circumference of the ferrule and adapted to be received in the space between the first and second supporting members of the receptacle.

Abstract: A terminal device for optical fibers is provided. The terminal device includes a connecting member for fixedly securing the covering of an optical fiber to a frame and having a hole through which the strand of the optical fiber can pass idly. The terminal device includes a positioning member for positioning in a predetermined positional relationship a plurality of ferrules disposed at the end portions of a plurality of optical fibers. The terminal device includes a guide member for guiding an optical fiber within the device in such a manner as to permit its movement only in its axial direction.

Abstract: A light-reflector type encoding method which comprises emitting light from one end of an optical fiber to a mobile body which moves relatively to said end of the optical fiber, through an optical lattice disposed at a fixed position relatively to said fiber end, receiving the reflected light from at least plural light-reflective graduations provided in the light-emitted zone of said mobile body through the optical lattice, and detecting the received reflected light with a photoelectric conversion element connected to the other end of the optical fiber. The present invention also provides a light-reflective type encoder suitable for carrying out the encoding method.