Alumina coatings for mercury vapor lamps

Details Alumina coatings for mercury vapor lamps Alumina coatings for mercury vapor lamps

H - Electricity

01

J

313/80

H01J 1/54 (2006.01) H01J 61/38 (2006.01) H01J 63/04 (2006.01)

Patent

CA 1060942

ABSTRACT OF THE DISCLOSURE An improved mercury vapor lamp construction has an ultraviolet-reflecting layer of alumina particles under a phosphor coating to enable reduction of the phosphor coating weight without an accompanying reduction in lamp lumen output. The alumina underlayer comprises spherical alumina particles that have been vapor-deposited in a certain particle size range to provide selective reflection of the ultraviolet radiation being emitted from the overlying phosphor coating. The alumina underlayer is deposited upon the interior surface of the lamp glass envelope and deposited upon the interior surface of the lamp conventional high-pressure and low-pressure mercury vapor lamps.

253595

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