Abstract: An optical connector in which the deformation of the connector caused by the shrinkage of an adhesive at the time of adhering and fixing an optical fiber and a ferrule is small, and the increment of loss in connection is suppressed.The optical connector in which different adhesives are used in an optical fiber insertion hole portion and an adhesive injection opening portion respectively.

Abstract: An optical connector for connecting optical fibers, comprises: a guide-groove substrate having grooves for positioning optical fibers and guide pins; an upper plate having groove portions each for covering the guide pins positioned in the guide grooves of the guide-groove substrate; elastic guide-pin pressing members each provided in the groove portions of the upper plate above portions where the guide pin grooves are in contact with the guide pins. In such a arrangement, it is preferable to forman oxide film on said V-grooves of the guide-groove substrate at least in the vicinity of contact points between the guide pins and the V-grooves. The optical connector further includes a resin molding portion for surrounding the substrate and the upper plate, the resin molding portion including a pair of opposite opened portions at top and bottom surfaces thereof.

Abstract: An optical connector for connecting optical fibers, comprises: a guide-groove substrate having grooves for positioning optical fibers and guide pins; an upper plate having groove portions each for covering the guide pins positioned in the guide grooves of the guide-groove substrate; elastic guide-pin pressing members each provided in the groove portions of the upper plate above portions where the guide pin grooves are in contact with the guide pins. In such a arrangement, it is preferable to form an oxide film on said V-grooves of the guide-groove substrate at least in the vicinity of contact points between the guide pins and the V-grooves. The optical connector further includes a resin molding portion for surrounding the substrate and the upper plate, the resin molding portion including a pair of opposite opened portions at a front and back surfaces thereof.

Abstract: An optical connector for connecting optical fibers, comprises: a guide-groove substrate having grooves for positioning optical fibers and guide pins; an upper plate having groove portions each for covering the guide pins positioned in the guide grooves of the guide-groove substrate; elastic guide-pin pressing members each provided in the groove portions of the upper plate above portions where the guide pin grooves are in contact with the guide pins. In such a arrangement, it is preferable to form an oxide film on said V-grooves of the guide-groove substrate at least in the vicinity of contact points between the guide pins and the V-grooves. The optical connector further includes a resin molding portion for surrounding the substrate and the upper plate, the resin molding portion including a pair of opposite opened portions at a front and back surfaces thereof.

Abstract: A polymer clad optical fiber comprising a core made of glass selected from the group consisting of quartz glass and optical glass, a cladding made of a cured material of a polymer composition comprising a ladder type polymethylsiloxane, a linear polymethylsiloxane having hydroxyl groups and optionally a solvent, and optionally a protecting layer made of a polymer material comprising a ladder type polysiloxane having phenyl side groups, which has low light transmission loss and increased mechanical strength.

Abstract: An optical fiber which comprises a light-guiding glass fiber and a coating around the glass fiber, the coating consisting of at least two layers of polyorganosiloxane resin compositions having a ladder portion and a linear portion, and a ratio of the ladder portion and the linear portion in one layer being different from that in other layer, has good strength and good thermal resistance.

Abstract: A process for producing a reinforcing member in a form of a solid wire or rod that contains a highly oriented resin as principal component and in which a degree of orientation decreases from center to periphery of said solid wire or rod, said process using a die having a molding port comprising at least one concentric molten resin extruding nozzle having a side wall with an inner and outer surface and a projecting rod member disposed along a central axis of said nozzle, and said process comprising extruding a molten highly oriented resin through said nozzle as a lubricant is applied to the inner surface of the side wall of said nozzle. A process for producing a reinforcing member in a form of a hollow pipe having a solid wall with an inner and outer surface that contains a highly oriented resin as principal component and in which a degree of orientation of said resin decreases from the inner surface of the solid wall of the pipe to the outer surface.

Abstract: A highly oriented resin-made reinforcing member that contains a highly oriented resin as the principal component and which has a cross-sectional distribution in the degree of orientation.