Patents by Inventor Arend J. W. A. Vermeulen

Arend J. W. A. Vermeulen 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).

  • Autofocus television camera with means for reading and comparing partial images to derive a focus indication
    Patent number: 4668991
    Abstract: A camera for recording television, photographic or cinematographic images comprises an automatic focusing device. The information required for automatic focusing is obtained with the aid of a partial blocking arrangement for blocking two different portions of an optical path leading to an electronic image sensor. These two portions are located on opposite sides of an optical central axis. After signals obtained during the partial blocking periods have been compared with each other, the focusing is adjusted until signal correlation is optimized.To produce a camera having both undisturbed scene recording and automatic focusing, while using only one sensor, this camera includes a charge transfer device. The device comprises a pickup member, a storage member, and a shift register member.
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: May 26, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Albert J. P. Theuwissen, Munehisa Izushi, Cornelis A. M. Jaspers, Martinus J. H. van de Steeg, Arend J. W. A. Vermeulen