Preventing contamination of the components of the optical system or obstruction of the light path

Full Title

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Arrangements or apparatus for facilitating the optical investigation > Preventing contamination of the components of the optical system or obstruction of the light path

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES