DIFF Subgroup
G02B 7/36 using image sharpness techniques
Introduced: January 1990
Full Title
Mountings, adjusting means, or light-tight connections, for optical elements > Systems for automatic generation of focusing signals > using image sharpness techniques
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1990.
Child Classifications
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- G02B 7/38 measured at different points on the optical axis since 1990 IPC+CPC Available in IPC and CPC