Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Reflector
Patent
1998-06-26
2000-02-01
O'Shea, Sandra
Electric lamp and discharge devices
With optical device or special ray transmissive envelope
Reflector
313110, 313572, 313637, 313638, 313643, 313634, 315248, 362345, H01J 1720, H01J 6112, H01J 6118
Patent
active
060206764
ABSTRACT:
The spectral energy characteristic of a discharge lamp is controlled by changing the density of the fill substance. The spectral characteristic can be shifted while substantially maintaining its shape by changing the density of the fill. A sulfur or selenium containing discharge lamp which is operated at a pressure of at least about 1 atmosphere contains a low ionization potential substance in the fill. Characteristics which are improved are one or more of spatial color uniformity, extinguishing characteristics, and bulb starting reliability. Particular substances which are added to the fill are alkali metal containing substances, III B metal containing substances, and alkaline earth metal containing substances. When light is reflected back into the bulb, the light which is re-emitted is stronger in the higher wavelengths.
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Dolan James T.
Ury Michael G.
Fusion Lighting Inc.
Haynes Mack
O'shea Sandra
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