G02B 15/22 with movable lens means specially adapted for focusing at close distances
Introduced: January 1985
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
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
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1985.
Child Classifications
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- G02B 15/24 having a front fixed lens or lens group and two movable lenses or lens groups in front of a fixed lens or lens group since 1985 IPC+CPC Available in IPC and CPC