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Sun-tanning lamps with improved tanning effect Disclosure Number: IPCOM000131162D
Publication Date: 2005-Nov-09
Document File: 1 page(s) / 4K

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Sun-tanning lamps with improved tanning effect

The quartz metal halide lamp for sun tanning, uses relative volatile salts, such as Fe, Co and Tl that require a cold spot temperature of about 800K to produce enough vapour pressure for the UV output.

The persistent pigmentation curve of sun tanning has a relative maximum value of 100 at 300nm and falls below 1 above 340nm. For efficiency and safety reasons the most efficient UV wavelengths for sun tanning are between 320-340nm. The present salts used for HPA lamps do not have strong radiation in this wavelength range.

Since ceramic materials can operate at a much higher wall temperature some less volatile yet potentially more efficient UV salts can be used in a ceramic lamp for sun tanning applications. It was discovered that a lamp is suitable as a UV lamp for sun tanning, curing and other applications when having a ceramic discharge vessel made of PCA, YAG, sapphire or AlN with one or more of the following salts: FeI2, CoI2, TlI, CuI, AgI, SnI2, InI, ZnI 2, TiI4.