Patent ID: 7470045

Claim:
A device for shielding outside lights comprising: mounting means for mounting a light source for emitting radiation; a substantially cylindrical, transparent shield body; said shield body having a surface which is provided with a zigzag-shaped profile in a vertical direction, said surface being adapted to deflect radiation incident thereon in a desired downward direction; wherein said zigzag-shaped profile has a plurality of triangular projections in a first portion, said triangular projections in said first portion being configured in such a way that emitted radiation from a light source mounted in the mounting means is fully reflected in a desired direction when passing through said first portion of said shield body; wherein said zigzag-shaped profile has a further plurality of triangular projections in a second portion, said further triangular projections in said second portion being configured in such a way that emitted radiation from a light source mounted in the mounting means is diffracted in a desired downward direction when passing through said second portion of said shield body; wherein said triangular projections of said zigzag-shaped profiles in said first and second portions have straight sides; and wherein said zigzag-shaped profile is asymmetric regarding a horizontal plane defined by the center of a light source mounted in the mounting means.