G
PHYSICS
G
PHYSICS
G01
MEASURING; TESTING
G01
MEASURING; TESTING
G01J
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
G01J
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
G01J1/00
Photometry, e.g. photographic exposure meter
G01J1/00
Photometry, e.g. photographic exposure meter
G01J1/02
Details
G01J1/02
Details
G01J1/0295
Constructional arrangements for removing other types of optical noise or for performing calibration
G01J1/0295
Constructional arrangements for removing other types of optical noise or for performing calibration