Patents by Inventor Carel A. Simons

Carel A. Simons 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).

  • Device for preventing unwanted reflections from an optical system to a laser in an apparatus for optically reading a record carrier
    Patent number: 4337535
    Abstract: An apparatus is described for reading a record carrier on which information is stored in an optically readable information structure, which apparatus includes a radiation source which supplies a read beam of great coherence length. By including a radiation attenuating element in the radiation path of the read beam, preferably nearest to the radiation source, random intensity modulations in the read beam, which modulations may be caused by undesired reflections in the radiation path, can be substantially reduced.
    Type: Grant
    Filed: February 14, 1979
    Date of Patent: June 29, 1982
    Assignee: U.S. Philips Corporation
    Inventors: Everardus A. Van Megen, Carel A. Simons, Eduard W. Moen