DIFF Subgroup
G02B 7/18 for prisms; for mirrors
Introduced: September 1968
Full Title
Mountings, adjusting means, or light-tight connections, for optical elements > for prisms; for mirrors
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
IPC defines codes here since 1990.
Child Classifications
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