Lamp having controllable characteristics

Details Lamp having controllable characteristics Lamp having controllable characteristics

H - Electricity

01

J

H01J 61/38 (2006.01) H01J 7/24 (2006.01) H01J 9/395 (2006.01) H01J 61/18 (2006.01) H01J 61/20 (2006.01) H01J 61/88 (2006.01) H01J 65/04 (2006.01)

Patent

CA 2133344

2133344 9321655 PCTABS00027 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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