Sumitomo Electric Industries, Limited

Nippon Telegraph and Telephone Public Corporation

Nippon Telegraph and Telephone Corporation

Nippon Kogaku K.k.

Koichiro Matsuno

Toshiaki Kakii

Shuzo Suzuki

Yuichi Toda

Yuichi Usui

Fumihiro Ashiya

Michito Matsumoto

Koushi Ishihara

Norio Kashima

Ryozo Ito

Eiji Nakamura

Masataka Hirai

Osamu Kawada

A ferrule for an optical connector made of a resin composition comprising a resin and carbon fiber as a filler having larger flexural strength and small mold shrinkage factor. The ferrule has a metal tube around its body that is embedded in its flange portion for added flexural rigidity.

Ferrule for optical connector

An optical connector ferrule and a method for producing such an optical connector ferrule wherein the bonding between a metal sleeve and the main body of the ferrule, which is made of a synthetic resin material, is markedly improved. A rearward end of the metal sleeve is embedded in the synthetic resin material, preferably, around a flange of the main body. The metal sleeve may be provided with irregularities on one or both of the inner and outer surfaces thereof to further improve the adhesion between the resin of the main body and the metal sleeve.

Optical connector ferrule and process for production thereof

An optical connector for joining exposed fiber ends of coated fibers and a method of manufacturing a pair of ferrules for the optical connector. The optical connector includes a pair of the ferrules each having a flange, the coated fiber and a metal pipe molded integrally with one another by using molding resin, a coupling pin fitted through holes of the ferrules, a sleeve for receiving the metal pipes of the ferrules, and a housing member for axially clamping the ferrules to each other.

Optical connector and method of manufacturing a pair of ferrules therefor

In order to simultaneously observe a transparent object from two directions, first and second beam paths containing first and second images from two directions are separated using a prism to reflect the second beam path yet pass the first beam path. The length of the second beam path is caused to be different from that of the first beam path. Then the first and second beam paths are combined so that the first and second images may be viewed simultaneously. The different beam path lengths result in the first and second images being formed at the same position. As a result, the images carried by the first and second beam paths, both passing through a single objective lens, may be viewed simultaneously at a single location.

Method and apparatus for simultaneously observing a transparent object

A heating apparatus for thermally shrinkable tubes and the like has a heating density gradient such that a higher temperature is imparted initially to a central portion of the heated tube, spreading gradually to the ends of the tube, to purge air bubbles to the outside of the tube while employing only one heating element.

Method of heating thermal shrinkage tube and apparatus therefor

A method and apparatus for cutting simultaneously a plurality of glass fibers at an uncoated end portion so as to provide smooth mirror planar cut surfaces. The method of the present invention comprises the steps of removably securing each of the fibers on either side of a cutting point, placing each of the secured fibers on a resilient material provided in the region of the cutting point, scoring the outer surface of each of the fibers at the cutting point, and arcuately bending each of the fibers between the secured portions so as to impart a tension along the axial direction of each of the fibers, whereby the cutting occurs at the cutting point. Two embodiments of the apparatus of the present invention which perform the cutting operation in accordance with the method of the present invention are disclosed.

Method and apparatus for cutting optical fibers

A pair of optical fibers each having a core and a plastic clad is connected end to end by removing end portions of the plastic clads to expose end portions of the cores of the fibers, and contacting the end portions of the cores so that the optical axis of one fibers. The contacting portion of the fibers are connected by heat melting. The connecting portion of the fibers are covered with a melting, and covering the connecting portion of the fibers with a protection sleeve composed of an inner plastic layer having a refractive index smaller than that of the core and an outer metal layer and having an inner diameter substantially equal to an outer diameter of the optical fiber. The ends of the sleeve are sealingly connected onto the outer surfaces of the optical fibers, respectively.

Growing community of inventors

Yokohama, Japan

Koichiro Matsuno