Patents Assigned to Nippon Selfoc Co., Ltd.
  • Patent number: 4003074
    Abstract: A hermetically sealed injection semiconductor laser device includes a hollow cylinder in which a crystal laser pellet is enclosed. The ends of the cylinder are sealed by metal electrodes one of which projects axially into the cylinder and is connected to an electrode surface of the crystal pellet. A lens element is disposed within the cylinder.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: January 11, 1977
    Assignee: Nippon Selfoc Co., Ltd.
    Inventors: Hiroo Yonezu, Izuo Hayashi
  • Patent number: 3955015
    Abstract: A method of manufacturing a light conducting element of synthetic resin in which a continuous change takes place in refractive index from the surface of the element toward its interior, which comprises bringing a transparent solid article of a network polymer which is in the incompletely polymerized state and contains 2 to 80% of a solvent-soluble component, into contact at its surface with a monomer capable of forming a polymer having a different refractive index from the network polymer thereby to cause the diffusion and migration of the monomer into the interior of the article through the contact surface, thereby setting up a gradient in the concentration of the monomer component in the interior of the above article which gradually decreases from the contact surface toward the interior, and simultaneously with, or after, this diffusion step, polymerizing the monomer in the interior of the article and completing the polymerization of the network polymer of the article.
    Type: Grant
    Filed: October 18, 1973
    Date of Patent: May 4, 1976
    Assignee: Nippon Selfoc Co., Ltd.
    Inventors: Yasuji Ohtsuka, Motoaki Yoshida