using infrared light

Introduced: January 1980

Last revised: January 2014

Full Title

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 > Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands > Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry > using infrared light

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

7 direct subcodes

Child Classifications

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G01N 21/3504 for analysing gases, e.g. multi-gas analysis
G01N 21/3554 for determining moisture content
G01N 21/3563 for analysing solids; Preparation of samples therefor
G01N 21/3577 for analysing liquids, e.g. polluted water
G01N 21/3581 using far infrared light; using Terahertz radiation
G01N 21/359 using near infrared light
G01N 21/37 using pneumatic detection