Patents by Inventor Masanao Kawahara

Masanao Kawahara 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).

  • Cemented lens and process for production thereof
    Patent number: 5162825
    Abstract: A cemented lens consists of a lens that is tinted and/or contains a UV absorber, and a second lens that is neither tinted nor contains any UV absorber. The cemented lens is formed by placing the two lens elements together with a UV-curable adhesive between them, and then directing UV radiation through the first lens to cure the adhesive.
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: November 10, 1992
    Assignee: Asahi Kogaku Kogyo K.K.
    Inventors: Yosio Kamekura, Masanao Kawahara
  • Adjusting structure in an aspheric lens grinding apparatus
    Patent number: 4132036
    Abstract: A lens grinding apparatus which is particularly suitable for grinding aspheric lenses has a rotary shaft which carries the lens which is to be ground and which is supported for rotation about the axis of the shaft by a support structure which has a support axis parallel to but spaced from the shaft axis. A mounting structure mounts the support structure on an oscillating structure which carries a template which determines the curvature of the lens surface which is ground and which has an oscillating axis around which the template is oscillated while the mounting structure, support structure and shaft supported thereby are all oscillated also about the oscillating axis. This oscillating axis is perpendicular to the shaft axis. By turning the support structure about its support axis with respect to the mounting structure it is possible to adjust the shaft axis so that it intersects the oscillating axis.
    Type: Grant
    Filed: October 12, 1977
    Date of Patent: January 2, 1979
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Yuzuru Doi, Masanao Kawahara, Yasuyuki Tejima
  • Cemented lens and process for production thereof
    Patent number: RE36049
    Abstract: A cemented lens consists of a lens that is tinted and/or contains a UV absorber, and a second lens that is neither tinted nor contains any UV absorber. The cemented lens is formed by placing the two lens elements together with a UV-curable adhesive between them, and then directing UV radiation through the first lens to cure the adhesive.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: January 19, 1999
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Yosio Kamekura, Masanao Kawahara