Systems for automatic generation of focusing signals

Introduced: January 1990

Full Title

Mountings, adjusting means, or light-tight connections, for optical elements > Systems for automatic generation of focusing signals

Of 7 combined children, 4 exist in both systems.

3 codes are CPC-only extensions.

IPC defines codes here since 1990.

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G02B 7/282 CPC only CPC only
G02B 7/285 CPC only CPC only
G02B 7/287 CPC only CPC only
G02B 7/30 using parallactic triangle with a base line since 1990 +1 CPC IPC+CPC Available in IPC and CPC
G02B 7/34 using different areas in a pupil plane since 1990 +2 CPC IPC+CPC Available in IPC and CPC
G02B 7/36 using image sharpness techniques since 1990 +1 CPC IPC+CPC Available in IPC and CPC
G02B 7/40 using time delay of the reflected waves, e.g. of ultrasonic waves since 1990 IPC+CPC Available in IPC and CPC