G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/28 (2006.01) F21V 8/00 (2006.01) G02B 5/02 (2006.01) G02B 5/28 (2006.01) G02B 5/30 (2006.01)
Patent
CA 2244185
A light guide (42) having a non-light emitting portion (44) made up of multiple layers of first and second substantially non-absorptive longitudinally specular light reflector materials. The index of refraction of each layer differs from the indices of refraction of the immediately adjacent layers, such that the layers collectively have high longitudinally specular reflectivity. The light guide also has a light emitting portion (48) made of prism light guide wall material. A substantially non-absorptive light scattering mechanism (52) is positioned within the non-light emitting portion (44) in opposition to the light emitting portion (48).
Un conduit de lumière (42) comprenant une partie non luminescente (44) composée de plusieurs couches d'un premier et d'un deuxième matériaux relativement non absorbants réfléchissant la lumière de manière spéculaire longitudinale. L'indice de réfraction de chaque couche diffère des indices de réfraction des couches immédiatement contiguës de sorte qu'ensemble, lesdites couches présentent une réflectivité spéculaire longitudinale élevée. Ledit conduit de lumière est également pourvu d'une partie luminescente (48) composée d'un matériau membranaire pour conduit de lumière prismatique. Un mécanisme (52) de diffusion de lumière relativement non absorbant est placé sur la partie non luminescente (44), face à la partie luminescente (48).
Oyen Wiggs Green & Mutala Llp
The University Of British Columbia
LandOfFree
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