LIGHT GUIDE FOR MODIFYING A LIGHT DISTRIBUTION PATTERN Russian patent published in 2018 - IPC G02B3/08 

FIELD: lighting engineering.

SUBSTANCE: light guide for modifying a light distribution pattern comprises a transparent element having: a first light-ingress surface – Fresnel lens surface, and a second light-egress surface. Second surface comprises elevations for directing a part of the light into directions sideward, with respect to a direction in which the light exits the transparent element through the second surface. Each elevation is shaped to provide total internal reflection for a light beam on a first point of the surface of the elevation, and refract the reflected light beam on a second point of the surface of the elevation so as to direct the light beam sideward.

EFFECT: technical result is to ensure observing the light which exits the guide at a small viewing angle to its surface.

14 cl, 14 dwg