Patent ID: 8425101
Filing Date: 2013-04-23
Classification: F21V,F21Y,G02F

Abstract:
1. An illumination system having a light exit window for emitting light from the illumination system, the illumination system comprising: a diffuse reflecting screen arranged opposite the light exit window, a light source being arranged for indirect illumination of the light exit window via the diffuse reflecting screen, the light source being arranged near an edge of the light exit window on an imaginary plane substantially parallel to the light exit window, the light emitted from the light source having an angular distribution around a vector pointing away from the light exit window, the vector being inclined with respect to a normal axis of the imaginary plane for reducing a glare of the illumination system, and an edge wall arranged between the diffuse reflecting screen and the light exit window, the edge wall comprising a specular reflecting mirror being concavely shaped for reflecting at least part of the light emitted by the light source towards the diffuse reflecting screen.