Patent ID: 7729054

Claim:
An optical diffuser comprising a transparent base body with a base body surface, wherein said base body surface comprises a plurality of facets, said facets have elevations or depressions associated therewith, and said elevations or said depressions have respective apexes (S), wherein coordinates (x s ′, y s ′) of said respective apexes (S) are derived from coordinates (x p , y p ) of corresponding points (P), said points (P) being defined by an arrangement of regular hexagonal facets with regular hexagonal edge contours; wherein said coordinates (x s ′, y s ′) are derived from said coordinates (x p , y p ) of said points (P) by a rotation of said arrangement of said regular hexagonal facets with said regular hexagonal edge contour about a center (0, 0) through a twist angle (δ).