Incoherent Light Sources

Since the invention and industrialization of incandescent lamps at the end of the 19th century electrical lighting has become a commodity in our daily life. Today, incoherent light sources are used for numerous application areas. Major improvements have been achieved over the past decades with respect to lamp efficiency (Fig. 10.1), lifetime and color properties. Open image in new window Fig. 10.1 Temporal development of the luminous efficacy of electrical light sources (LP = low pressure, HP = high pressure)