Rare-gas low-pressure discharge lamp, method of manufacturing a rare-gas low-pressure discharge lamp, and application of a gas discharge lamp
AssigneeKoninklijke Philips Electronics N.V.
InventorsThomas Juestel, Hans Nikol, Cornelis Jojakim Jalink
Life of this patent
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Abstract
A rare-gas low-pressure discharge lamp for generating ultraviolet light, in particular for cosmetic or therapeutic purposes, has a discharge vessel which is filled with rare gas and is at least partly transparent to UV light and which is at least partly coated with a phosphor which radiates UV light upon excitation by an excitation radiation produced in the discharge vessel so as to utilize a desired spectral range.
Claims11
A rare-gas low-pressure discharge lamp for generating ultraviolet light, in particular for cosmetic or therapeutic purposes, with a discharge vessel which is filled with a gas consisting of at least one rare gas, the discharge vessel being at least partly transparent to UV light, the discharge vessel being at least partly coated with a phosphor which radiates UV light when excited by UV excitation radiation produced in the discharge vessel characterized in that the discharge vessel is at least partly made of a glass having a transmissivity of 20 to 70% for light of 312.6 nm wavelength.
Dependencies are inferred from the claim text.