Patents by Inventor Rudiger Duchateau

Rudiger Duchateau 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).

  • Autofocusing arrangement for a stereomicroscope which permits automatic focusing on objects on which reflections occur
    Patent number: 5288987
    Abstract: The invention relates to a high-precision autofocusing arrangement for a stereomicroscope wherein a bar-shaped marking is projected via a cylinder optic on an object. The imaged bar-shaped marking is at least in one dimension less or equal to the resolution of the viewing beam path. A region of the objective not used optically is selected for projection as the pass-through pupil.
    Type: Grant
    Filed: September 24, 1992
    Date of Patent: February 22, 1994
    Assignee: Carl-Zeiss-Stiftung
    Inventors: Uwe Vry, Christian Lucke, Ulrich Sander, Werner Muller, Joachim Luber, Klaus Knupfer, Thomas Hellmuth, Rudiger Duchateau, Hartmut Wolf