Patent ID: 7414789
Filing Date: 2008-08-19
Classification: G02B

Abstract:
1. A method for producing an apparatus for homogenizing light, which comprises the steps of: providing at least one substrate having at least one optically functional area; forming a plurality of lens elements in the at least one optically functional area, the lens elements each having a surface with systematic surface irregularities; dividing the at least one substrate into at least two parts each containing the lens elements; and reaasembling at least two of the at least two parts of the at least one substrate with at least one of the parts having a different alignment, due to the different alignment of the at least one of the at least two parts, deviations in light caused by systematic irregularities in the surface of the lens elements are added together after penetrating through individual ones of the lens elements of the at least two parts and substantially canceling each other out.