Patents by Inventor Wolfgang Bruehl

Wolfgang Bruehl 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).

  • Method of calibrating a stereomicroscope and a stereomicroscope capable of being calibrated
    Patent number: 7068426
    Abstract: A method of calibrating the magnification of a stereomicroscope having variable magnification comprises the steps of (A) positioning an object reference measure (10) with a known scaling in an object plane (8) of the stereomicroscope; (B) providing an eyepiece reference measure (6a) of known scaling in an intermediate image plane (7) of the stereomicroscope; (C) varying the magnification of the stereomicroscope using a zoom system (4) thereof so that an image of the object reference measure (10) is brought into optical alignment (coincidence) with the eyepiece reference measure (6a) in the intermediate image plane (7) in order to determine a zoom position of the zoom system (4) corresponding to this alignment; (D) determining an actual magnification of the stereomicroscope in the zoom position on the basis of a lateral magnification defined by the scalings of the object reference measure (10) and eyepiece reference measure (6a) which have been brought into alignment; (E) determining a nominal magnification of
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: June 27, 2006
    Assignee: Leica Microsystems (Schweiz) AG
    Inventors: Wolfgang Bruehl, Danilo Parlatano, Peter Bertschi
  • Method of calibrating a stereomicroscope and a stereomicroscope capable of being calibrated
    Publication number: 20040004762
    Abstract: A method of calibrating the magnification of a stereomicroscope having variable magnification comprises the steps of (A) positioning an object reference measure (10) with a known scaling in an object plane (8) of the stereomicroscope; (B) providing an eyepiece reference measure (6a) of known scaling in an intermediate image plane (7) of the stereomicroscope; (C) varying the magnification of the stereomicroscope using a zoom system (4) thereof so that an image of the object reference measure (10) is brought into optical alignment (coincidence) with the eyepiece reference measure (6a) in the intermediate image plane (7) in order to determine a zoom position of the zoom system (4) corresponding to this alignment; (D) determining an actual magnification of the stereomicroscope in the zoom position on the basis of a lateral magnification defined by the scalings of the object reference measure (10) and eyepiece reference measure (6a) which have been brought into alignment; (E) determining a nominal magnification of
    Type: Application
    Filed: June 5, 2003
    Publication date: January 8, 2004
    Inventors: Wolfgang Bruehl, Danilo Parlatano, Peter Bertschi