Hollow cavity light guide for the distribution of collimated...

G - Physics – 02 – B

Patent

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Details

G02B 27/30 (2006.01) F21V 8/00 (2006.01) G02B 6/10 (2006.01) G02B 27/10 (2006.01) G02F 1/13357 (2006.01)

Patent

CA 2407624

An optical light guide comprising optical elements enclosing a hollow cavity (7) is configured to uniformly distributed homogenized collimated light (1) to a liquid crystal display (16). The optical light guide includes a beam splitting structure (3) covering the entrance aperture (2) of the light guide, a retarder (13) and specular reflector (15) on the face of the light guide opposite the entrance aperture, an exit aperture (11) orthogonal to the entrance aperture with a reflective polarizer (8) and a beam directing structure (10) over the exit aperture, and a specular reflector (12) on the bottom of the light guide opposite the exit aperture.

Guide optique contenant des éléments optiques comprenant une cavité creuse (7), configuré pour distribuer uniformément une lumière collimée homogénéisée (1) à destination d'un afficheur à cristaux liquides (16). Le guide optique comprend une structure de séparateur de faisceau (3) recouvrant l'ouverture d'entrée (2) du guide lumineux, un retardateur (13) et un réflecteur spéculaire (15) sur la face du guide optique, en face de l'ouverture d'entrée, une ouverture de sortie (11) orthogonale par rapport à l'ouverture d'entrée avec un polariseur réfléchissant (8) et une structure de direction de faisceaux (10) au-dessus de l'ouverture de sortie, ainsi qu'un réflecteur spéculaire (12) sur le guide optique, en face de l'ouverture de sortie.

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