Nippon Telegraph and Telephone Corporation

Shinsuke Matsui

Toshiaki Tamamura

Shigekuni Sasaki

Shinji Ando

Fumio Yamamoto

Yasuko Maruo

Tohru Matsuura

Kazuo Matsunaga

Fumikazu Ohira

Yoshiyuki Ishikawa

Mitsushi Matsunaga

An optical connector machining apparatus () is comprised of an operation circuit box () containing a drive motor () and a battery () while serving as a grasping section, and a planetary gear mechanism box () having a drive mechanism () that rotatably holds a polishing table () with a polishing table retainer () while permitting rotation of the drive motor to be delivered to the polishing table retainer through a planetary gear mechanism, wherein a chuck mounting section () is fixedly secured to the planetary gear mechanism box through two pieces of columns (), and a chuck (), slidably guiding a ferrule (A) with respect to the polishing table in a vertical direction, and a pressure-applying mechanism () for urging the ferrule to the polishing table in a vertical direction, are mounted to the chuck mounting section.

Apparatus for and method of machining of optical connector end

A method and apparatus are disclosed wherein, while holding an optical fiberby an optical fiber holder sectionso as to serve a distal endof the optical fiberas a free end and holding the distal endof the optical fiberin contact with a grinding flat portionto cause the distal endof the optical fiberto be flexed on the grinding flat portion, reciprocating movement for causing the distal endof the optical fiberto slide on the grinding flat portionin a first sliding direction and an oppositely orientated second sliding direction is relatively implemented a plural number of times between the grinding flat portionand the distal endof the optical fiber

Processing method and apparatus of distal end of optical fiber

An apparatus and method are provided for polishing end faces of optical connector ferrules, wherein control is performed to achieve uniform pressure of each ferrule with respect to a polishing plate of the apparatus, there by improving the precision of polishing the ferrule end faces. A polishing apparatus ( ) for polishing end faces of ferrules to a convex spherical shape comprises a polishing plate ( ), a polishing apparatus main unit ( ) capable of freely moving the polishing plate ( ) in the XY plane while rotating it, a cylinder block mechanism ( ) with a plurality of pressure-applying mechanisms ( ) arranged in a ring, and a height adjustment mechanism ( ) of the cylinder block mechanism, the pressure-applying mechanism ( ), having a piston shaft ( ) which is pushed outward in a direction perpendicular to the polishing plate ( ) by an air cylinder ( ), the ferrule ( ) being mounted to the end part of the pressure-applying mechanism ( ) via a ferrule holding plate ( ). Each of the ferrules ( ) has imparted to it an appropriate pressure by an air cylinder ( ) thereby pressing it up against the polishing plate ( ), so that the proper polishing is achieved even if the overall lengths of the ferrules ( ) are different. By selecting the polishing grit material used, it is possible to simplify the polishing process.

Apparatus and method for polishing a ferrule end face for an optical connector

A polyimide optical waveguide comprising a core made of polyimide whose refractive index is controlled to a predetermined value by electron beam irradiation, and a cladding set in contact with the core and having a refractive index lower than that of the core.

Polyimide optical waveguide and method of manufacturing the same

Polimide optical waveguide

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Machida, Japan

Shinsuke Matsui