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Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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21/00
Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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G01N21/17
Systems in which incident light is modified in accordance with the properties of the material investigated
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G01N21/47
Scattering, i.e. diffuse reflection
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G01N21/49
within a body or fluid
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G01N21/51
inside a container, e.g. in an ampoule
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G01N2021/516
Multiple excitation of scattering medium, e.g. by retro-reflected or multiply reflected excitation rays
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