Mercury-free uv gas discharge lamp
AssigneeHanovia Limited
InventorIan MAYOR-SMITH
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Abstract
A mercury-free high-pressure metal-halide ultraviolet gas-discharge lamp comprising a primary filling of at least one of osmium, germanium and tellurium, and a secondary filling comprising at least one of tin, antimony, indium, tantalum and gold. In a preferred embodiment, the primary filling is TeI2 and the secondary filling is SbI3.
Claims15
A mercury-free high-pressure metal-halide ultraviolet gas-discharge lamp comprising a primary filling of at least one of osmium, germanium and tellurium, and a secondary filling comprising at least one of tin, antimony, indium, tantalum and gold.
A gas-discharge lamp according to any preceding claim, wherein the lamp output comprises electromagnetic radiation of wavelength in the range 200-300 nm.
A gas-discharge lamp according to any preceding claim, wherein the primary lamp filling has similar physical characteristics, such as vapour pressure, to mercury.
A gas-discharge lamp according to any preceding claim, wherein the secondary lamp filling has suitably high enough vapour temperature not to impact lamp characteristics, both at lamp starting and running temperatures.
A gas discharge lamp substantially as herein described with reference to the accompanying drawings.
A method of filling a gas-discharge lamp substantially as herein described with reference to the accompanying drawings.
Dependencies are inferred from the claim text.