OPTICAL ELEMENT FOR OBTAINING A DAYLIGHT APPEARANCE, A LIGHTING SYSTEM AND A LUMINAIRE Russian patent published in 2016 - IPC F21V9/02 

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