Low-pressure mercury vapor discharge lamp

Details Low-pressure mercury vapor discharge lamp Low-pressure mercury vapor discharge lamp

1980-07-02

1983-01-25

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313493, H01J 6130, H01J 6144

Patent

active

043705952

ABSTRACT:
Low-pressure mercury vapor discharge lamp suitable for use in photo-therapy and having a glass discharge tube which is opaque to shorter wavelength ultraviolet radiation and bears a luminescent layer on its inside surface. A problem in such lamps is to produce a useful quantity of radiation which is effective for photo-therapy in combination with as low a quantity of erythema-producing radiation as possible. The luminescent layer comprises a luminescent material having the characteristic line emission of gadolinium at 312 nm, and the glass has an absorption edge located between 280 and 305 nm.

REFERENCES:
patent: 2413940 (1947-01-01), Bickford, Jr.
patent: 2447210 (1948-08-01), Roberts
patent: 3581137 (1971-05-01), Arnott et al.
patent: 4215289 (1980-07-01), De Hair et al.
"Comparison Between Photo-Chemo-Therapy and Selective Photo-Therapy in Dermatology" by H. Tronnier et al., Article From Afinidad, 34, May 1977, pp. 285-290.

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