Lighting especially for a motor vehicle has series of light uncoupling layers to successively deflect a light beam through an extended outlet surface

摘要

A lighting unit, especially for a motor vehicle, comprises a light-separating unit (14) into which light from a source (6) is fed and spreads parallel to a light outlet surface (3). Uncoupling layers (16) of refractive index different from the intervening medium are angled to the light and reflect a small part of it outwards at each layer, transmitting the remainder.