Patent ID: 8212962
Filing Date: 2012-07-03
Classification: B29D,G02B,G02F

Abstract:
1. An optical device for concentrating light in a first direction, comprising a sheet carrying a plurality of first light-concentrating elements, the sheet being non-flat in a first plane which is perpendicular to an axis such that each second plane, which contains the axis and which intersects the sheet, intersects the sheet at at least one substantially straight line which is substantially parallel to the axis, each of the first light-concentrating elements being substantially prismatic with first and second surfaces, which extend from the sheet and intersect at a substantially straight intersection line which is substantially parallel to the axis, and a third surface at the sheet facing an angle of intersection of the first and second surfaces, each of the first light-concentrating elements being arranged such that a third plane substantially parallel to the axis and the first direction and passing through the intersection line divides the third surface into two parts of substantially identical widths perpendicular to the axis.