Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

Scope Notes

Limiting references: Investigating strength properties of solid materials by application of mechanical stress Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid Analysing materials by measuring the pressure or volume of a gas or vapour Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials Investigating resistance of materials to the weather, to corrosion, or to light Investigating materials by mechanical methods | Application references: Investigation of spectral properties of light per se, or measurements of the properties of materials where spectral properties of light are sensed and primary emphasis is placed on creating, detecting or analysing the spectrum, providing that the properties of the materials to be investigated are of minor importance Contactless testing of electronic circuits using optical radiation

Child Classifications

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• G01N 21/01 Arrangements or apparatus for facilitating the optical investigation
• G01N 21/17 Systems in which incident light is modified in accordance with the properties of the material investigated
• 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
• G01N 21/75 Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
• G01N 21/84 Systems specially adapted for particular applications