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US 7,253,948 B2Granted
Optical magnification device for distance variation
AssigneeLeica Microsystems (Schweiz) AG
InventorUlrich Sander
Life of this patent
Estimating the term…
Abstract
An optical magnification device for varying the distance between an observer's eye (1) and an object (7), e.g., for a binocular magnifier or a microscope, in which focusing onto the object (7) is accomplished by means of progressive lenses (3) displaceable perpendicular to the observation beam(s) (2).
Claims7
A stereomicroscope comprising:
- a main objective;
- a pair of beam paths passing through the main objective;
- an eyepiece tube including a tube lens in each of the pair of beam paths;
- a zoom lens system between the main objective and the eyepiece tube;
- and
- exactly one pair of progressive lenses between the main objective and the eyepiece tube, the exactly one pair of progressive lenses being associated one progressive lens to each of the pair of beam paths, the exactly one pair of progressive lenses being displaceable laterally in the pair of beam paths as a unit to adjust focus of an object image viewed through the stereomicroscope.
3 more elements
Dependencies are inferred from the claim text.