Patent ID: 6863420

Claim:
An anti-dazzling transparent screen for an elongate light source ( 2 ) covering the light source ( 2 ) over a length thereof for providing an anti-dazzling effect of a radiating sector (α) of the light source ( 2 ), the anti-dazzling transparent screen comprising: a surface formed of elongate prisms ( 10 ) extending approximately parallel to one another and aligned substantially in a longitudinal direction of the light source ( 2 ); wherein the prisms ( 10 ) each have a first lateral side surface and a second lateral side surface and base surface; wherein the prisms ( 10 ) are positioned relative to the light source ( 2 ) such that the base surfaces face the light source and the light beams ( 13 ) radiating from the light source ( 2 ) directly enter the prisms ( 10 ) through the base surface; wherein the prisms are oriented relative to the light source such that the light beams that directly impinge on the first lateral side surfaces after entering through the base surfaces are total-reflected on the first lateral side surfaces ( 11 , 12 ) and propagate as total-reflected light beams and the light beams that directly impinge on the second lateral side surfaces after entering through the base surfaces pass through the second lateral side surfaces.