ILLUMINATION DEVICE WITH INTEGRATED LIGHT GUIDE Russian patent published in 2012 - IPC G02B6/00 

FIELD: physics.

SUBSTANCE: device has a reflector and a light guide plate with two main surfaces and opposite and parallel lateral sides. A transparent scattering pattern in form of an array on the first main surface receives optical radiation, generates first scattered optical radiation towards the reflector plate, captures reflected optical radiation from the reflector plate and generates second scattered optical radiation towards the second main surface. The plurality of scattering elements of the pattern are separated from each other by etched grooves. The lateral interval between the vertex of one base of one of the etched lines and the corresponding vertex of the base of another etched line is minimal, and the depth of the etched grooves is maximum towards the first central line of the scattering pattern.

EFFECT: lifting restrictions on the angle of divergence and angle of incidence of optical radiation on the scattering pattern.

12 cl, 9 dwg