Patents by Inventor Jan J. van der Sande

Jan J. van der Sande 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).

  • Light amplifier for obtaining intensified light image from photoemissive surface
    Patent number: 3974376
    Abstract: This disclosure concerns a light amplification apparatus for focusing a light image of an object being viewed by the apparatus on a photoemissive surface which then emits a pattern of electrons directed at a fluorescent screen. An intensified light image of the object is produced on the screen by the electrons emitted from the photoemissive surface. The photoemissive surface faces in a direction away from the object being viewed and is concave for receiving light rays from the object being viewed which have been directed thereon by a lens-mirror having a rear concave mirror surface facing the concave photoemissive surface and a front convex surface. Thus, the light rays entering and leaving the lens-mirror are refracted in such a way as to produce a sharply focused image on the photoemissive surface.
    Type: Grant
    Filed: November 22, 1966
    Date of Patent: August 10, 1976
    Assignee: Astrophysics Research Corporation
    Inventor: Jan J. van der Sande