by interferometric methods (using interferometers for measuring optically the linear dimensions of objects G01B9/02)

Introduced: January 1980

Title

Titles differ between systems:

IPC: by interferometric methods

CPC: by interferometric methods (using interferometers for measuring optically the linear dimensions of objects G01B9/02)

Full Title

Full titles differ between systems:

IPC:

Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength > by interferometric methods

CPC:

Measuring optical phase difference (devices or arrangements for controlling the phase of light beams G02F1/01); Determining degree of coherence; Measuring optical wavelength (spectrometry G01J3/00) > by interferometric methods (using interferometers for measuring optically the linear dimensions of objects G01B9/02)

Of 16 combined children, 0 exist in both systems.

16 codes are CPC-only extensions.

Note: 14 CPC extensions are marked as secondary classification only.

Child Classifications

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G01J 2009/0203 2nd only CPC only CPC only
G01J 2009/0207 2nd only CPC only CPC only
G01J 2009/0211 2nd only CPC only CPC only
G01J 2009/0223 2nd only CPC only CPC only
G01J 2009/0226 2nd only +1 CPC CPC only CPC only
G01J 2009/0234 2nd only +1 CPC CPC only CPC only
G01J 2009/0242 2nd only CPC only CPC only
G01J 2009/0249 2nd only +1 CPC CPC only CPC only
G01J 2009/0257 2nd only CPC only CPC only
G01J 2009/0261 2nd only +1 CPC CPC only CPC only
G01J 2009/0269 2nd only CPC only CPC only
G01J 2009/0273 2nd only CPC only CPC only
G01J 2009/0276 2nd only CPC only CPC only
G01J 2009/028 2nd only +4 CPC CPC only CPC only
G01J 9/0215 +1 CPC CPC only CPC only
G01J 9/0246 CPC only CPC only