Radiation viewer for inspecting an enclosure

Radiation-responsive apparatus

Radiometer

Radiometer including a cleaning system

Radiometer system and method of calibrating radiometer receiver

Radiometer with correction device

Radiometers

Radiometric calibration

Railroad hot box detector

Rainbow color detector

Raman spectrometer utilizing a tunable laser

Raman spectrometry apparatus and method

Random access monochromator

Range switching device

Rapid color shading process

Rapid pharmaceutical identification and verification system

Readhead for a photometric diagnostic instrument

Reading device for monochromator

Real-time color comparator

Recipe calculation method for matt colour shades