Illumination device for a projector

G - Physics – 03 – B

Patent

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Details

G03B 21/20 (2006.01) F21V 7/06 (2006.01) G03B 27/54 (2006.01)

Patent

CA 2281517

The invention relates to a lighting device for illuminating an extensive, image-creating field (62) in a projector, comprising light-source elements and a reflector (10) arranged behind said light-source elements. The light-source elements take the form of a plurality of lamps (48, 50, 52, 54), preferably xenon-containing gas discharge reflector lamps. The reflector (10) consists of a plurality of adjoining reflector segments (12, 14, 16, 18), whereby each of the reflector segments (12, 14, 16, 18) is optically aligned with one of the lamps (48, 50, 52, 54) in such a way that the result is a generally evenly illuminated surface.

L'invention concerne un dispositif d'éclairage pour éclairer un champ (62) étendu produisant des images dans un projecteur, qui contient des éléments de sources lumineuses et un réflecteur (10) placé derrière lesdits éléments de sources lumineuses. Les éléments de sources lumineuses sont formés par une pluralité de lampes (48, 50, 52, 54), de préférence des lampes de projecteurs à décharge gazeuse contenant du xénon. Le réflecteur (10) comprend une pluralité de sections adjacentes (12, 14,,16, 18), chacune de ces sections (12, 14, 16, 18) étant alignée optiquement sur une des lampes (48, 50, 52, 54) de manière qu'il en résulte une surface éclairée très homogène.

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