Patents by Inventor Rolf Ruder

Rolf Ruder 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).

  • Projection system for projecting a color video picture and transformation optical system for same
    Patent number: 5694180
    Abstract: In a projection system for projecting a video picture composed of picture points on a screen with at least one light source which emits a light bundle and can be varied in intensity and with a deflecting device which deflects the light bundle to illuminate the picture points on the screen, a transformation optical system having at least two stages is arranged between the deflecting device and the screen and is corrected according to the tangent condition so as to be free of distortion. The transformation optical system has at least two optical stages. The first optical stage produces an intermediate image plane which is imaged on the screen by means of the subsequent optical stage (s).
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: December 2, 1997
    Assignee: LDT GmbH & Co. Laser-Display-Technologie KG
    Inventors: Christhard Deter, Klaus Hiller, Gunther Elster, Rolf Ruder, Wolfgang Holota