DIFF Subgroup
G02B 7/10 by relative axial movement of several lenses, e.g. of varifocal objective lens
Introduced: September 1968
Full Title
Mountings, adjusting means, or light-tight connections, for optical elements > for lenses > with mechanism for focusing or varying magnification > by relative axial movement of several lenses, e.g. of varifocal objective lens
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1985.
Child Classifications
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- G02B 7/105 with movable lens means specially adapted for focusing at close distances since 1985 IPC+CPC Available in IPC and CPC