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PCE
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DIFF Subgroup
G02B 7/30

using parallactic triangle with a base line

Introduced: January 1990

Full Title

Mountings, adjusting means, or light-tight connections, for optical elements > Systems for automatic generation of focusing signals > using parallactic triangle with a base line

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 7/305 CPC only CPC only
  • G02B 7/32 using active means, e.g. light emitter since 1990 IPC+CPC Available in IPC and CPC