| 摘要 |
FIELD: optics.SUBSTANCE: invention relates to optical elements which are used to create a daylight appearance. Optical element for use in front of a light source for obtaining a skylight appearance, a lighting system and a luminaire are suggested. Optical element has a light transmitting cell, which comprises a light transmitting channel, a light input window, a light exit window and a wall. Light transmitting channel collimates a part of light emitted by the light source. Light input window is located on a first side of the light transmitting channel for receiving light from the light source. Light exit window emits light with the skylight appearance. At least, a part of the light exit window is arranged at a second side of the light transmitting channel opposite to the first side. Wall is located between and the part of the light exit window. Wall encloses the light transmitting channel.EFFECT: at least a part of the wall is reflective and/or transmissive in a predefined spectral range for obtaining a blue light emission at relatively large light emission angles with respect to a normal to the part of the light exit window.15 cl, 11 dwg |
