with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group

Introduced: September 1968

Last revised: January 2006

Full Title

Optical objectives with means for varying the magnification > by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective > with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group

Classification Context

Section:: PHYSICS
Class:: OPTICS
Subclass:: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

3 direct subcodes

Child Classifications

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G02B 15/163 having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
G02B 15/177 having a negative front lens or group of lenses
G02B 15/2 having an additional movable lens or lens group for varying the objective focal length