Patents by Inventor Ingrid Schehrer

Ingrid Schehrer 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).

  • Optical system for imaging the light from light sources
    Patent number: 5307208
    Abstract: An optical system for imaging the light from light sources having varying astigmatic differences of focus in different planes, having an optical element with an astigmatic effect and having an imaging lens system, the optical element having an astigmatic effect being provided with two lens components, the distance of which in the direction of the optical axis can be adjusted in order to correct astigmatic differences of focus varying from light source to light source and/or changing astigmatic differences of focus due to aging.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: April 26, 1994
    Assignee: Optische Werke G. Rodenstock
    Inventors: Engelbert Hofbauer, Ingrid Schehrer, Jakob Bleicher, Siegfried Hetz, Ulrich Matern