Reflector electrode for electrodeless bulb
First Claim
Patent Images
1. A high power discharge lamp apparatus comprising:
- an electrodeless bulb that includes a chamber;
a fill contained within the chamber in the bulb; and
at least one reflector electrode adjacent the bulb for transmitting electromagnetic energy to the fill in the bulb to excite the fill and cause it to radiate light and for reflecting the light radiated by the fill, wherein a diffusely reflecting material is deposited on the at least one reflector electrode.
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Abstract
A lamp apparatus includes an electrodeless bulb that includes a chamber, a gas contained within the chamber in the bulb, and at least one reflector electrode adjacent the bulb for transmitting radio-frequency electromagnetic energy to the gas in the bulb to excite the gas and cause it to radiate light and for reflecting the light radiated from the bulb. Preferably, there are two reflectors electrodes. The bulb can advantageously be made of a tube, in which case the reflectors electrodes can be made shorter than the bulb and centered thereon so that the intense heat caused by the plasma when the gas is excited does not reach the ends of the bulb.
110 Citations
35 Claims
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1. A high power discharge lamp apparatus comprising:
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an electrodeless bulb that includes a chamber; a fill contained within the chamber in the bulb; and at least one reflector electrode adjacent the bulb for transmitting electromagnetic energy to the fill in the bulb to excite the fill and cause it to radiate light and for reflecting the light radiated by the fill, wherein a diffusely reflecting material is deposited on the at least one reflector electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A high power discharge lamp apparatus comprising:
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an electrodeless bulb that includes a chamber; a fill contained within the chamber in the bulb; and two reflector electrodes adjacent the bulb for transmitting electromagnetic energy to the fill in the bulb to excite the fill and cause it to radiate light and for reflecting the light radiated by the fill, wherein a diffusely reflecting material is deposited on the two reflector electrodes. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A high power discharge lamp apparatus comprising:
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an electrodeless bulb that includes a chamber; a fill contained within the chamber in the bulb; and two reflector electrodes adjacent the bulb for transmitting electromagnetic energy to the fill in the bulb to excite the fill and cause it to radiate light and for reflecting the light radiated by the fill, wherein the bulb is a tube having a first end and a second end, and the two reflector electrodes extend along the length of the tube and have respective ends which are spaced from the first end and the second end of the tube, wherein the first and second ends of the tube remain relatively cool during operation as compared to the center of the tube. - View Dependent Claims (30, 31, 32)
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33. A high power discharge lamp apparatus comprising:
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an electrodeless bulb that includes a chamber; a fill contained within the chamber in the bulb; and two reflector electrodes adjacent the bulb for transmitting electromagnetic energy to the fill in the bulb to excite the fill and cause it to radiate light and for reflecting the light radiated by the fill, wherein a gap is formed between the two reflector electrodes and wherein a non-conductive reflective material is disposed in the gap. - View Dependent Claims (34, 35)
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Specification