An irradiation device for introducing infrared radiation into a vacuum processing chamber has an infrared emitter capped on one end and including an emitter casing tube in the form of a round glass tube, of which a closed end projects into the vacuum processing chamber. A vacuum feedthrough holds the emitter casing tube and leads it in a gas-tight manner through an opening of the vacuum processing chamber. A heating filament and a current return are arranged in the emitter casing tube, wherein the heating conductor has, in the section of the emitter casing tube surrounded by the vacuum feedthrough, a connection element that is led out from the emitter casing tube. The connection element of the heating conductor is guided through a tube section and the return conductor has, in the section of the emitter casing tube surrounded by the vacuum feedthrough, a means for compensating for thermal expansion.

An irradiation device for introducing infrared radiation into a vacuum processing chamber has an infrared emitter capped on one end and including an emitter casing tube in the form of a round glass tube, of which a closed end projects into the vacuum processing chamber. A vacuum feedthrough holds the emitter casing tube and leads it in a gas-tight manner through an opening of the vacuum processing chamber. A heating filament and a current return are arranged in the emitter casing tube, wherein the heating conductor has, in the section of the emitter casing tube surrounded by the vacuum feedthrough, a connection element that is led out from the emitter casing tube. The connection element of the heating conductor is guided through a tube section and the return conductor has, in the section of the emitter casing tube surrounded by the vacuum feedthrough, a means for compensating for thermal expansion.

The present disclosure relates to a light bulb, including: an enclosure provided with a connection portion, the connection portion being provided with an opening in communication with an interior of the enclosure; a base connected to the connection portion of the enclosure, an inner side surface of the base being provided with a first conductive contact, and an inner end of the base away from the enclosure being provided with a second conductive contact; a light-emitting body including an alternating current filament, a first resistor, and a second resistor, the alternating current filament being configured to emit light and located in the enclosure; and a plug arranged at the opening, the plug being configured to block the opening.

The present disclosure relates to a light bulb, including: an enclosure provided with a connection portion, the connection portion being provided with an opening in communication with an interior of the enclosure; a base connected to the connection portion of the enclosure, an inner side surface of the base being provided with a first conductive contact, and an inner end of the base away from the enclosure being provided with a second conductive contact; a light-emitting body including an alternating current filament, a first resistor, and a second resistor, the alternating current filament being configured to emit light and located in the enclosure; and a plug arranged at the opening, the plug being configured to block the opening.