INCANDESCENT LAMP WITH INTERFERENCE COATING Russian patent published in 2003 - IPC

FIELD: electrical engineering. SUBSTANCE: incandescent lamp with interference coating has halide quartz lamp built in reflector neck wherein it is set on heat-resistant mastic; external part of reflector neck is made in the form of cylinder and its internal part, in the form of truncated cone, ratio of diameters of lower and upper neck bases d₁ to diameter of upper base d₂ being d₁:d₂ = 1,2÷1,3, and ratios of diameters of reflector upper hole d₃, neck lower base d₁, halide quartz lamp bulb d₄ being d₃:d₁:d₄ = 8:3:2,5; projection is provided in upper part of reflector neck. Such design ensures optimal operating temperature conditions for lamp. EFFECT: enhanced service life of lamp. 2 cl, 2 dwg