G02B 15/28 arranged +-+
Introduced: January 1985
Title
Titles differ between systems:
IPC: arranged + – +
CPC: arranged +-+
Full Title
Full titles differ between systems:
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 movable lens means specially adapted for focusing at close distances > having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group > arranged + – +
Optical objectives with means for varying the magnification (anamorphotic objectives G02B13/08) > 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 movable lens means specially adapted for focusing at close distances > having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group > arranged +-+
No child classifications to compare. This is a leaf node in both IPC and CPC.