to lighting applications that provide a directed and uniform area of light it is a feature of the present invention that it adapts light redirecting properties used in cpcs and similar structures to achieve a highly efficient redistribution of light advantages of the present invention over other brightness enhancing films include improved on axis and near axis luminance gain and enhanced control over light distribution angles the present invention provides a compact integrated solution for brightness enhancement optically coupled to the light guiding plate itself the film of the present invention requires no separation distance the present invention does not require use of a high quality reflective backing for the light guiding plate instead the film of the present invention directs light using wave guiding effects and total internal reflection tir with minimal loss from reflection a film fabricated according to the present invention can be used with dbef dual brightness enhancement film materials or with other types of reflective polarizers it is yet a further advantage of the present invention that it allows the use of a wide range of transparent materials for brightness enhancement fabrication the apparatus and methods of the present invention advantageously provide ways to improve spatial uniformity in a manufacturable brightness enhancement film design the invention has been described with reference to a preferred embodiment however it will be appreciated that variations and modifications can be effected by a person of ordinary skill in the art without departing from the scope of the invention for example while the ideal parabolic shape of fig3 has particular advantages approximations.