Patent ID: 6396631
Filing Date: 2002-05-28
Classification: G02B,G02F,Y10S,Y10T

Abstract:
A light fixture comprising:(a) a light source; (b) a multilayer mirror positioned to reflect light emitted by the light source toward an output side of the light fixture; and (c) a reflective polarizer positioned to transmit light of a desired polarization, and to reflect light of another polarization back into the light source and the mirror, wherein the multilayer mirror comprises alternating layers of at least a first layer type comprising a first polymeric material and a second layer type comprising a second polymeric material, wherein a difference in indices of refraction between the two layer types is &Dgr;x along a first in-plane axis, &Dgr;y along a second in-plane axis perpendicular to the first in-plane axis, and &Dgr;z along a third axis mutually orthogonal to the first and second axes, and wherein |&Dgr;z| is less than about 0.5k, where k is the larger of |&Dgr;x| and |&Dgr;y|.