Patent ID: 6324009
Filing Date: 2001-11-27
Classification: G02B

Abstract:
A substantially transparent sheet having anisotropic optical properties comprising:a body of transparent material having a pair of opposing sides and an index of refraction substantially greater than one; anda plurality of plano-convex lenses formed on a first side of said pair of opposing sides and substantially covering said first side, each of said plurality of plano-convex lenses comprising:an elongate arcuate segment; anda plurality of holes at least partially piercing said arcuate segment and evenly spaced along the length of said arcuate segment, each of said plurality of holes having at least one dimension smaller than the distance between axes of an adjacent pair of said plano-convex lenses, each of said plurality of holes substantially orthogonal to said pair of opposing sides of said body of transparent material;wherein each of said plurality of plano-convex lenses has a substantially circular cross section and pre-determined dimensions based on a pre-determined distance between said transparent sheet and a viewer.