G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/04 (2006.01) F21V 5/02 (2006.01) G02B 5/20 (2006.01)
Patent
CA 2338123
An optical element (10, 10', 10") for deflecting light beams (18, 19), which enter and re-emerge from the latter, in such a way that their angle of emergence (.gamma.) is limited, in particular for use as a luminaire-cover, having a plate-like core (11, 11', 11") of transparent material which on one side is occupied by microprisms (12, 13) that taper - starting from their root (15) -- forming furrows (22), wherein all of the top surfaces (14) of the microprisms form the light-entry face and the other side (21) of the core forms the light--emergence face, and wherein the top surfaces (14) of the microprisms are formed convexly or concavely in a continuous or non-continuous manner, and also a method for producing the optical element (10, 10', 10").
L'invention concerne un élément optique (10, 10', 10'') permettant de dévier les rayons lumineux (18, 19) qui entrent dans et ressortent de cet élément, de telle façon que leur angle de sortie (.gamma.) soit limité. Cet élément sert notamment de cache d'un dispositif d'éclairage et comprend une base (11, 11', 11'') qui est réalisée en forme de plaque dans matériau transparent et dont une face est pourvue de microprismes (12, 13) qui sont effilés à partir de leur racine (15) en formant ainsi des rainures (22). L'ensemble des surfaces supérieures (14) des microprismes constitue la surface d'entrée de la lumière et l'autre face (21) de la base constitue la surface de sortie de la lumière. Les surfaces supérieures (14) des microprismes sont conçues convexes ou concaves de façon uniforme ou non. L'invention concerne également le procédé de production de l'élément optique (10, 10', 10'').
Gowling Lafleur Henderson Llp
Zumtobel Lighting Gmbh
Zumtobel Staff Gmbh
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