Patents by Inventor Yuuji Miura

Yuuji Miura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Interference film filter and an optical waveguide and a method for producing the same
    Patent number: 4846541
    Abstract: An interference film filter and an optical waveguide including a laminate which are deposition-formed by alternate lamination of a first thin film (2,4,10) of amorphous Si.sub.x C.sub.y O.sub.z (x:y:z=1:0.6-1:0-0.5) having refractive index up to 3.4 and a extinction coefficient below 0.1 and a second thin film (3,5,20) of amorphous Si.sub.x O.sub.y C.sub.z (x:y:z=1:1.8-2:0-0.5) having a low refractive index in comparison with that of the first thin film, thereby loss of light of the resultant interference film filter and the optical waveguide is reduced.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: July 11, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Yuuji Miura, Noboru Baba