Lamp apparatus with reflective ceramic sleeve holding a...

H - Electricity – 01 – J

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Details

H01J 1/02 (2006.01) H01J 5/16 (2006.01) H01J 7/24 (2006.01) H01J 17/16 (2006.01) H01J 61/30 (2006.01) H01J 61/40 (2006.01) H01J 61/52 (2006.01) H01J 65/04 (2006.01)

Patent

CA 2273871

A lamp apparatus (10A) for producing a beam of light that can be used as a part of a source for a projection system. The lamp apparatus (10A) of the present invention produces a beam of light (26) originating from a small aperture (15). The apparatus includes an electrodeless lamp body in the form of elongated outer tube (11) having a hollow interior. An inner sleeve (12) fits or is deposited inside the outer tube (11), the inner sleeve (12) having a fill (23) containing generally cylindrically or spherical shaped bore. The sleeve provides temperature resistant and reflection properties. Electrodes (24 and 25) positioned either internally or externally of the lamp body (11) are provided for producing radio frequency energy that excite the fill (23) contained in the bore of the inner sleeve (12) to form a plasma light source of intense heat. The light thus generated by the plasma in a relatively large volume is constrained to exit through a small aperture at either one, or both, ends of the apparatus (10A).

L'invention porte sur un appareil d'éclairage (10A) produisant un faisceau lumineux pouvant constituer une partie de la source lumineuse d'un système de projection. L'appareil (10A), qui produit un faisceau (26) sortant par une petite ouverture (15), consiste en une lampe sans électrode ayant la forme d'un tube (11) allongé et creux. Un manchon intérieur (12) s'adapte au tube extérieur (11) ou y est déposé. Ledit manchon (12) qui comporte une cavité (23) cylindrique ou sphérique remplie d'une substance de remplissage possède des propriétés de résistance à la chaleur et réfléchissantes. Des électrodes (24 et 25) placées à l'intérieur ou à l'extérieur du corps de lampe (11) produisent l'énergie à haute fréquence excitant la substance de remplissage placée dans la cavité (23) du manchon intérieur (12), y produisant une lumière intense. La lumière ainsi créée par le plasma, d'un volume relativement important, ne peut sortir que par une ou deux petites ouvertures placées à l'une des extrémités, ou aux deux extrémités, de l'appareil (10A).

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