Abstract: A tungsten halogen lamp (10) includes a light transmissive envelope (12), which encloses a tungsten filament (14) and a gaseous fill comprising an inert gas and a halogen-containing gas, such as an alkyl halide. In addition the fill includes a silicon-containing compound capable of gettering oxygen within the envelope. The atomic ratio of silicon to halogen in the envelope is selected so as to remove most, but not all of the oxygen present in the envelope A silicon:halogen ratio of less than about 0.5 more preferably, below about 0.4 has been found to be effective in this respect.

Abstract: An electric incandescent lamp includes a metal getter strip secured to a filament. The getter strip has a closed circumferential bounding edge which defines a closed aperture through which the filament extends and an integral retaining portion biased against said filament for retaining the bounding edge between a pair of coil turns. In a favorable embodiment, the strip has opposing portions each with a respective closed aperture through which the filament extends. Tail portions bent against the filament bias the opposing bounding edge of the apertures between respective turns to secure the getter to the filament. The side edges of the getter are spaced from the lamp envelope to avoid blackening of the inner wall adjacent the getter strip.

Abstract: A large area video camera is suitable for high energy imaging applications. The sensor-target of the camera tube is composed of TlBr, TlI, PbI.sub.2, or PbBr.sub.2 or a two layer structure comprising CsI and a photoconductive layer of materials such as amorphous silicon, amorphous selenium, cadmium sulphide, antimony trisulfide or antimony sulphide oxysulphide. A disclosed tube incorporates various modifications for dealing with problems associated with stray capacitance, premature electron leakage and secondary electron emission.