Self-luminous light source

Details Self-luminous light source Self-luminous light source

1989-10-10

1991-02-05

Berman, Jack I.

Radiant energy

Radiant energy generation and sources

2504581, 2504611, 2504621, 2504861, H01L 3104, F21K 200

Patent

active

049908049

ABSTRACT:
There is disclosed a self-luminous source of light preferably as applied to illuminated signs and safety markers which emits a high level of uniform light. The invention utilizes a beta emitter, preferably tritium gas, which is contained within a sealed glass enclosure having an interior coating of a phosphor. The glass enclosure is contained within an outer enclosure formed of a plastic filled with a fluorescent dye. The phosphor coating on the glass enclosure of the tritium gas absorbs beta radiation from the tritium and emits radiation in a wavelength approximately 360 nanometers which excites the fluorescent dye in the plastic outer enclosure.

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patent: 4213052 (1980-07-01), Caffarella et al.
patent: 4488047 (1984-12-01), Thomas
patent: 4715687 (1987-12-01), Glass et al.
patent: 4788437 (1988-11-01), Urquhart et al.

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