Optical radiation

The term "optical radiation" comprises the infrared radiation (IR), the light visible for man (VIS) and the ultraviolet radiation (UV). Optical radiation is part of the electromagnetic spectrum with a wavelength range from 100 nm to 1 mm.

The sun is the natural source of optical radiation. In addition optical radiation can be produced artificially (as e.g., in lasers, lamps, radiant heaters, sunbeds, electric arcs).