Discharge lamp with black light transmitting filter layer

Details Discharge lamp with black light transmitting filter layer Discharge lamp with black light transmitting filter layer

1976-10-20

1977-08-16

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

252300, 313112, H01J 6140, H01J 6144, G02B 522

Patent

active

040428494

ABSTRACT:
A low-pressure mercury discharge device utilizing a black light generating phosphor coating in conjunction with a black light transmitting filter pigment. The black light transmitting filter pigment effectively transmits black light radiation and filters visible light radiation. The filter comprises magnesium phosphate doped with cobalt and nickel having a formula Mg.sub.3.sub.-x.sub.-y Co.sub.x Ni.sub.y (PO.sub.4).sub.2, x + y is from 1 to 1.4, x/y is from .8 to 1.2.

REFERENCES:
patent: 2355258 (1944-08-01), Biggs et al.
patent: 2382939 (1945-08-01), Koch
patent: 2392095 (1946-01-01), Lemmers
patent: 2413940 (1947-01-01), Bickford, Jr.
patent: 3947719 (1976-03-01), Ott

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