G
PHYSICS
G01
MEASURING; TESTING
G01J
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3/00
Spectrometry; Spectrophotometry; Monochromators; Measuring colours
G01J3/0205
Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
G01J3/0208
using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction