Patents by Inventor Andrianus H. J. van den Brandt

Andrianus H. J. van den Brandt 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).

  • Patent number: 4969730
    Abstract: An image projection arrangement is described which comprises a light source (1) for producing a first light beam (b.sub.1), a reflective image display system (10) provided in the path of this light beam and a projection lens system (20), arranged in the path of a second light beam (b.sub.2) originating from the image display system. A beam-separating element (5) whose operating principle is based on total internal reflection of one of the beams (b.sub.1, b.sub.2) is provided in the light path between the light source and the image display system on the one hand and said system and the projection lens system on the other hand. This sresults in an adequate separation of these beams while the dimensions of the arrangement remain limited.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: November 13, 1990
    Assignee: U.S. Philips Corporation
    Inventor: Andrianus H. J. van den Brandt