Patent ID: 7471458
Filing Date: 2008-12-30
Classification: G02B

Abstract:
1. An objective for an operating microscope, wherein the objective is designed so that an imaging is produced with it from finite to infinite and wherein the objective comprises an objective-lens-system, which consists of a first optical subcomponent on the object side, a second optical subcomponent, and a third optical subcomponent, wherein the second optical subcomponent is arranged at a distance to the first optical subcomponent on the optical axis of the objective and one of the first and second optical subcomponents possesses a positive refractive power and the other of the first and second optical subcomponents possesses a negative refractive power, wherein the third optical subcomponent is arranged on the optical axis of the objective at a distance to the second optical component of the objective, wherein two of the optical subcomponents can be moved along the axis, wherein the working distance of the objective is variable, wherein the focal length can be varied independently of the working distance, wherein the objective has a zooming device, wherein the second optical subcomponent and the third optical subcomponent can be moved relative to each other and relative to the first optical subcomponent, wherein one of the second and third optical subcomponents has a positive refractive power and the other of the second and third optical subcomponents has a negative refractive power and wherein, for focusing, a change in the relative position of the subcomponent of the objective on the object side can be conducted relative to the other two optical subcomponents.