Tubular electric lamp with an interference filter on tubular...

Details Tubular electric lamp with an interference filter on tubular... Tubular electric lamp with an interference filter on tubular...

H - Electricity

01

J

313/118, 313/136

H01J 61/35 (2006.01) H01K 1/32 (2006.01)

Patent

CA 1268202

ABSTRACT: The electric lamp according to the invention has a mainly tubular glass lamp vessel (1) coated with an interference filter (5) of alternating layers of SiO2 and of a material having a comparatively high refractive index. The lamp vessel 1 has portions at the area of and near its seals (6,7) having a form deviating from the tubular form and is in situ free from the material having a high refractive index of the interference filter (5). As a result, the lamp vessel (1) has a comparatively high resistance to pressure. Figure.

521148

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