Passive reduction of errors

Introduced: January 2022

Full Title

Measuring instruments characterised by the use of optical techniques > Interferometers > Reduction or prevention of errors; Testing; Calibration > Passive reduction of errors

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 2022.

Child Classifications

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G01B 9/02057 CPC only CPC only
G01B 9/02058 CPC only CPC only
G01B 9/02059 CPC only CPC only
G01B 9/02061 Reduction or prevention of effects of tilts or misalignment since 2022 IPC+CPC Available in IPC and CPC