Plasma lamp with dielectric waveguide integrated with transparent bulb
First Claim
1. An electrodeless plasma lamp comprising:
- a structure configured to at least partially to confine power at an operating frequency within a volume of the structure, the structure having an outer surface that is non-transmissive to light and an opening provided in the outer surface of the structure;
a bulb containing a fill and having at least one transparent elongate side, a volume of the bulb being less than the volume of the structure and the opening including at least one dimension greater than a width of the bulb;
a feed connectable to a power source and extending into the volume of the structure to provide the power at the operating frequency, the fill forming a plasma to emit light when the power is received by the fill; and
a dielectric material supporting the bulb proximate the opening such that the light is transmitted through the transparent elongate side of the bulb when the plasma is formed along a transmission path outside of the bulb that transmits the light away from the structure.
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Accused Products
Abstract
A dielectric waveguide integrated plasma lamp (DWIPL) with a body comprising at least one dielectric material having a dielectric constant greater than approximately 2, and having a shape and dimensions such that the body resonates in at least one resonant mode when microwave energy of an appropriate frequency is coupled into the body. A dielectric bulb within a lamp chamber in the body contains a fill which when receiving energy from the resonating body forms a light-emitting plasma. The bulb is transparent to visible light and infrared radiation emitted by the plasma. Radiative energy lost from the plasma is recycled by reflecting the radiation from thin-film, multi-layer coatings on bulb exterior surfaces and/or lamp chamber surfaces back into the bulb. The lamp further includes two- or three-microwave probe configurations minimizing power reflected from the body back to the microwave source when the source operates: (a) at a frequency such that the body resonates in a single mode; or (b) at one frequency such that the body resonates in a relatively higher mode before a plasma is formed, and at another frequency such that the body resonates in a relatively lower order mode after the plasma reaches steady state.
126 Citations
21 Claims
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1. An electrodeless plasma lamp comprising:
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a structure configured to at least partially to confine power at an operating frequency within a volume of the structure, the structure having an outer surface that is non-transmissive to light and an opening provided in the outer surface of the structure; a bulb containing a fill and having at least one transparent elongate side, a volume of the bulb being less than the volume of the structure and the opening including at least one dimension greater than a width of the bulb; a feed connectable to a power source and extending into the volume of the structure to provide the power at the operating frequency, the fill forming a plasma to emit light when the power is received by the fill; and a dielectric material supporting the bulb proximate the opening such that the light is transmitted through the transparent elongate side of the bulb when the plasma is formed along a transmission path outside of the bulb that transmits the light away from the structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification