IPC Subgroup
G01N 21/49 within a body or fluid
Introduced: January 1980
Last revised: January 2006
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 > Scattering, i.e. diffuse reflection > within a body or fluid
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
2 direct subcodes
Child Classifications
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- G01N 21/51 inside a container, e.g. in an ampoule
- G01N 21/53 within a flowing fluid, e.g. smoke