Lighting fixture with smooth adjustable beam width

Details Lighting fixture with smooth adjustable beam width Lighting fixture with smooth adjustable beam width

F - Mech Eng,Light,Heat,Weapons

21

V

F21V 14/04 (2006.01) F21V 7/06 (2006.01) F21V 21/00 (2006.01)

Patent

CA 2570789

A lighting fixture having a main housing to which is attached a moveable reflector assembly. The fluorescent lamps are affixed to the main housing and the moveable reflector assembly is adjusted to a position close to the fluorescent lamps to achieve a narrow illumination field. Adjusting the position of the moveable reflector assembly away from the fluorescent lamps achieves a wide illumination field. The reflector is designed as a near parabolic like shape and may be configured as a single fluorescent lamp cavity, or a multiple lamp cavity wherein the parabolic like shapes for each fluorescent lamp intersect to provide a uniform illumination light field and highly efficient light output while minimizing the lighting fixture width.

Un luminaire comprenant un logement principal qui est fixée à un ensemble réflecteur mobile. Les lampes fluorescentes sont fixées au logement principal et l'ensemble réflecteur mobile est réglé à une position à proximité des lampes fluorescentes afin d'obtenir un champ lumineux étroit. Le réglage de la position de l'ensemble réflecteur mobile à l'écart des lampes fluorescentes permet d'obtenir un large champ lumineux. Le réflecteur est conçu en une forme presque parabolique et peut être configuré comme une cavité à lampe fluorescente unique , ou une cavité à lampes multiples où les formes paraboliques pour chaque lampe fluorescente se croisent pour fournir un champ lumineux uniforme et une sortie de lumière hautement efficace tout en minimisant la largeur du luminaire.

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