Laser diodes emit a monochromatic and coherent light with a wavelength of 450 nanometers. Naturally presenting a bluish shimmer, a phosphor-coated film covers the diode, creating a white light suitable for automotive applications.Even smaller than LED diodes, they’re just a few micrometers in diameter and come very close to the theoretical ideal of a high-output, point light source for use in cars.

In the Audi Sport quattro laserlight concept show car, which Audi displayed at the CES, the high beam produced by the laser diodes is three times as bright as the LED high beam. Because the light beam is tightly bundled, laser diodes are not currently suitable for wide, low-beam light.

Article source: www.audi.co.uk