Tubular electrodeless lamp
AssigneeLumartix SA
InventorsLaurent Calame, Andreas Meyer
Life of this patent
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Abstract
An electrodeless discharge lamp with one or more stationary light emitting bulbs inside a common conductive shield to confine an electromagnetic excitation field provided by a plurality of sources. Each bulb can be excited by several electromagnetic radiation sources or by an individual electromagnetic radiation source. Tubular realization of the lamp, with two magnetron or transistor electromagnetic sources facing each other at the extremity of a tubular bulb, are particularly suitable for installation at the focal line of parabolic trough reflector. Some variants combine bulbs of different compositions, and excitation levels can be independently set to control the spectrum of emitted light.
Claims12
An electrodeless discharge lamp for providing visible and/or infrared and/or UV radiation comprising an electrically conductive envelope that is at least partially transparent to visible and/or infrared and/or UV radiation, one or more stationary light emitting bulbs inside the conductive envelope, the one or more bulbs being filled with a composition that emits light when in plasma state, wherein the one or more bulbs each have several tubular extensions, a plurality of electromagnetic sources each electromagnetic source having an output terminal located at an extremity of one of the tubular extensions radiating an electromagnetic field for ionizing and heating the composition in the one or more bulbs to bring it in a plasma state.
Dependencies are inferred from the claim text.