Preventing contamination of the components of the optical system or obstruction of the light path

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Arrangements or apparatus for facilitating the optical investigation > Preventing contamination of the components of the optical system or obstruction of the light path

CPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light (G01N3/00 - G01N19/00 take precedence) > Arrangements or apparatus for facilitating the optical investigation > Preventing contamination of the components of the optical system or obstruction of the light path

Of 5 combined children, 0 exist in both systems.

5 codes are CPC-only extensions.

Note: 5 CPC extensions are marked as secondary classification only.

Child Classifications

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G01N 2021/151 2nd only CPC only CPC only
G01N 2021/152 2nd only CPC only CPC only
G01N 2021/154 2nd only CPC only CPC only
G01N 2021/155 2nd only +1 CPC CPC only CPC only
G01N 2021/158 2nd only CPC only CPC only