Low-pressure mercury vapour discharge lamp

Details Low-pressure mercury vapour discharge lamp Low-pressure mercury vapour discharge lamp

H - Electricity

01

J

313/81

H01J 61/42 (2006.01) A61N 5/06 (2006.01) C03C 3/078 (2006.01) C03C 3/087 (2006.01) C03C 17/23 (2006.01) H01J 61/38 (2006.01) H01J 61/44 (2006.01)

Patent

CA 1164925

10-06-1980 9 PHN 9508 ABSTRACT: "Low-pressure mercury vapour discharge lamp". Low-pressure mercury vapour discharge lamp suitable for use in photo-therapy and having a glass discharge tube which is opaque to shor- ter 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 lumines- cent 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.

354919

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