Patent ID: 7758227

Claim:
An apparatus comprising: a) a first light emitting source; b) a first light input surface disposed to receive light from the first light emitting source; c) a first light output surface through which a first portion of light emitted form the first light emitting source exits the apparatus in a first light output profile; d) a first axis x, a second axis y and a third axis z, both the second axis y and third axis z are mutually orthogonal and orthogonal to the first axis x; e) a first dispersed phase domain of a first dispersed domain material of refractive index n px1 along the first axis x, wherein the first disperse phase domain is ellipsoidal in shape and has a dimensional length parallel to the first axis x smaller than its dimensional length parallel to the second axis y; f) a first volumetric light scattering region comprising the first dispersed phase domain and a first continuous phase material of refractive index n mx1 along the first axis x wherein |n mx1 -n px1 |>0.001; g) a volumetric light transmitting region comprising the first volumetric light scattering region and disposed to receive light from the first light emitting source wherein a first curved portion of the first volumetric light scattering region is curved in shape within a first across-sectional plane orthogonal to the first light output surface; wherein said volumetric light transmitting region provides control of spatial luminance uniformity and angular illuminance distribution of said apparatus; wherein the apparatus emits anisotropic light; wherein the first light output profile comprises a first angular range of output light in a plane comprising the first axis x and third axis z, and a second angular range of output light in a plane comprising the second axis y and third axis z wherein the full angular width at half of the maximum intensity of the intensity profile of the first angular range of output light is larger than the full angular width at half of the maximum intensity of the intensity profile of the second angular range of output light.