High-pressure mercury-vapor lamp having a plural phosphor coatin

Details High-pressure mercury-vapor lamp having a plural phosphor coatin High-pressure mercury-vapor lamp having a plural phosphor coatin

1975-06-20

1977-09-06

Rolinec, Rudolph V.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313110, 313486, H01J 162

Patent

active

040470695

ABSTRACT:
A high pressure mercury vapor lamp having an outer bulb with a plural-phosphor coating on the inside surface thereof. A first phosphor provides for emission peaks within the range of wavelengths between 440 and 540 nm and contains strontium chloroapatite, barium magnesium aluminate, strontium chlorosilicate, barium magnesium aluminate, or barium strontium silicate, each activated with di-valent europium. A second phosphor includes yttruim vanaphosphate activated with tri-valent europium which has emission peaks between 600 and 720 nm.

REFERENCES:
patent: 3748517 (1973-07-01), Haft
patent: 3875453 (1975-04-01), Thurnton, Jr.

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