Specular reflectivity

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 > Systems in which incident light is modified in accordance with the properties of the material investigated > Specular reflectivity

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) > Systems in which incident light is modified in accordance with the properties of the material investigated (where the material investigated is optically excited causing a change in wavelength of the incident light G01N21/63) > Specular reflectivity

CPC subdivides this area 4x more granularly than IPC with 6 additional codes.

6 codes are CPC-only extensions.

Note: 6 CPC extensions are marked as secondary classification only.

IPC defines codes here since 1980.

Child Classifications

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G01N 2021/551 2nd only CPC only CPC only
G01N 2021/555 2nd only CPC only CPC only
G01N 2021/556 2nd only CPC only CPC only
G01N 2021/557 2nd only CPC only CPC only
G01N 2021/558 2nd only CPC only CPC only
G01N 2021/559 2nd only CPC only CPC only
G01N 21/552 Attenuated total reflection since 2014 +1 CPC IPC+CPC Available in IPC and CPC
G01N 21/57 Measuring gloss since 1980 +1 CPC IPC+CPC Available in IPC and CPC