Patents Assigned to Mitsubishi Metal Co.,
  • Radiation-resistant optical conductor
    Patent number: 4733939
    Abstract: It is disclosed that a radiation-resistant optical conductor, such as an optical fiber for telecommunication, a multiple fiber for an image scope, and a light guide for illumination, which comprises a core composed of a pure silica glass which is prepared via an ultrahigh temperature of at least 3,000.degree. C. and has an OH group content of from 0.1 to 300 ppm, and a cladding layer formed on the core, and the cladding layer being composed of a silica glass which contains boron element and fluorine element as a dopant.
    Type: Grant
    Filed: August 8, 1985
    Date of Patent: March 29, 1988
    Assignees: Mitsubishi Metal Co.,, Dainichi-Nippon Cables, Ltd.
    Inventors: Atsushi Utsumi, Hiroyuki Hayami