Descriptors | Lasers, Safety measures, Light hazards, Equipment safety, Occupational safety, Light emission, Classification systems, Light-emitting diodes, Physiological effects (human body), Wavelengths, Visibility, Eyes, Radiation hazards, Marking, Performance testing, Optical instruments, Optical measurement, Dimensional measurement, Test equipment, Equations, Angles (geometry), Radiation measurement, Testing conditions, Luminous intensity, Signal devices, Conversion (units of measurement), Information exchange, Data transfer |