Apparatus for exciting an electrodeless lamp with microwave...

H - Electricity – 05 – B

Patent

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H05B 41/24 (2006.01) H01J 65/04 (2006.01)

Patent

CA 2214891

Apparatus for exciting an electrodeless lamp to produce visible light. A source of microwave energy (22) is coupled to a cylindrical cavity (10) which encloses an electrodeless lamp (11). The cylindrical cavity (10) includes a sidewall and end wall (10a) which is made from a metallic mesh which passes light produced from the electrodeless lamp (11). The electric field intensity within the cylindrical cavity (10) is increased in the region (11a) above the lamp center (11b). The increased electric field intensity produces more uniform temperature across the bulb surface, thereby increasing the rate of plasma heating of gas molecules within the lamp (11).

Appareil destiné à exciter une lampe sans électrode pour produire de la lumière visible. Une source d'énergie hyperfréquence (22) est couplée à une cavité cylindrique (10), laquelle renferme une lampe sans électrode (11). La cavité cylindrique (10) comprend une paroi latérale ainsi qu'une paroi terminale (10a) constituée de mailles métalliques faisant passer la lumière produite par la lampe sans électrode (11). L'intensité du champ électrique à l'intérieur de la cavité cylindrique (10) est augmentée dans la région (11a) située au-dessus du centre (11b) de la lampe. L'intensité du champ électrique augmentée produit une température plus uniforme sur la surface de l'ampoule, augmentant ainsi la vitesse de chauffage par plasma de molécules de gaz à l'intérieur de la lampe (11).

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