Electrodeless lamp for phototherapy

H - Electricity – 01 – J

Patent

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Details

H01J 65/04 (2006.01) H01J 61/44 (2006.01) A61N 5/06 (2006.01)

Patent

CA 2649948

A photo-therapeutic, electrodeless lamp (10) comprising a closed-loop envelope (12) containing an arc generating and sustaining medium that includes mercury. A phosphor coating (14) is provided on the interior surface of the envelope (12). The phosphor coating is capable of generating a first radiation in response to excitation from 254 nm radiation and provides the first radiation having an energy output in the region of 335-430 nm. This wavelength region is most efficient for the treatment of morphea or scleroderma. The output radiated energy from the lamp in the 335-430 nm region is >=20,000 µW/cm2 In a preferred embodiment of the invention the phosphor is SrB4O7:Eu, which has a spectral response with a peak between 366-368 nm with a bandwidth of about 18 nm.

La présente invention concerne une lampe sans électrodes (10) photothérapeutique comprenant une enveloppe en boucle fermée (12) contenant un medium générant et soutenant un arc qui comprend du mercure. Un revêtement de substance fluorescente (14) est disposé sur la surface intérieure de l'enveloppe (12). Le revêtement de substance fluorescente est capable de générer un premier rayonnement en réponse à une excitation par des rayonnements de 254 nm et émet le premier rayonnement dont l'émission d'énergie est comprise dans la zone de 335-430 nm. Cette zone de longueurs d'ondes est très efficace pour le traitement des morphées ou des sclérodermies. L'énergie rayonnée d'émission depuis la lampe dans la zone de 335-430 nm est >=20000 µW/cm2. Dans un mode de réalisation préféré de l'invention, la substance fluorescente est du SrB4O7:Eu, dont la réponse spectrale présente un pic entre 366-368 nm avec une largeur de bande d'environ 18 nm.

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