Patents by Inventor Nagata Shinichi

Nagata Shinichi 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).

  • Optical system
    Patent number: 4852980
    Abstract: An optical system for illuminating an object, including an entrance pupil for receiving light from a light source, an exit pupil for passing the light received to an object to be illuminated, and an optical axis which extends through the optical sytem to the light source and the object respectively, wherein the entrance height of the light received in the entrance pupil is substantially proportioned to the tangent of the exit angle in the exit pupil.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: August 1, 1989
    Assignee: Dainippon Screen Manufacturing Co., Ltd.
    Inventor: Nagata Shinichi