Patents by Inventor Elke Andersson

Elke Andersson 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).

  • Patent number: 7561339
    Abstract: The invention is directed to an objective for telescope-type stereomicroscopes with magnification that can be adjusted at post-magnification systems. The objective, which comprises two lens groups LG1 and LG2, satisfies the two conditions DAP?42 mm, and tan(?)?0.16, where DAP is the diameter of the exit pupil and ? is the field angle of the objective at the lowest possible magnification setting. When this condition is met, the optical axis of the objective lies midway between the center lines of the two post-magnification systems. In preferred constructions, the total focal length f?objective of the objective is between 40 mm and 160 mm, and the relationship of the focal length f?LG2 of the second lens group LG2 to the total focal length f?objective is expressed by 0.1?1.8723/f?objective?1/f?LG2?0.2?1.8723/f?objective.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: July 14, 2009
    Assignee: Carl Zeiss MicroImaging GmbH
    Inventors: Johannes Winterot, Elke Andersson
  • Publication number: 20080192338
    Abstract: The invention is directed to an objective for telescope-type stereomicroscopes with magnification that can be adjusted at post-magnification systems. The objective, which comprises two lens groups LG1 and LG2, satisfies the two conditions DAP?42 mm, and tan(?)?0.16, where DAP is the diameter of the exit pupil and ? is the field angle of the objective at the lowest possible magnification setting. When this condition is met, the optical axis of the objective lies midway between the center lines of the two post-magnification systems. In preferred constructions, the total focal length f?objective of the objective is between 40 mm and 160 mm, and the relationship of the focal length f?LG2 of the second lens group LG2 to the total focal length f?objective is expressed by 0.1?1.8723/f?objective?1/f?LG2?0.2?1.8723/f?objective.
    Type: Application
    Filed: September 21, 2005
    Publication date: August 14, 2008
    Applicant: CARL ZEISS JENA GMBH
    Inventors: Johannes Winterot, Elke Andersson