CPC Subgroup
G01N 21/62 Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
Full Title
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 the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
5 direct subcodes
Child Classifications
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- G01N 21/63 optically excited
- G01N 21/66 electrically excited, e.g. electroluminescence
- G01N 21/70 mechanically excited, e.g. triboluminescence
- G01N 21/71 thermally excited