Patent ID: 9046688
Filing Date: 2015-06-02
Classification: A61B,G02B

Abstract:
1. A surgical microscope, comprising: an imaging system that provides a magnified multidimensional image of an object disposable in a focal plane of the imaging system along at least one optical imaging path, the imaging system comprising an objective, the objective comprising at least two lens groups through which the at least one optical imaging path passes one after another, and which define the focal plane of the imaging system, wherein at least one lens group of the objective is moveable along its optical axis relative to the at least one other lens group of the objective, wherein the objective's first lens group which is located directly adjacent to the focal plane along the at least one optical imaging path consists of at least three optical lenses and has altogether a negative optical power, and wherein the absolute value of the focal length of the first lens group of the objective does altogether not exceed 35% of the absolute value of a minimum focal length of the objective.