Double wall infrared emitter

摘要

An infrared energy emitter is disclosed which comprises a longitudinally extending tubular enclosure of infrared energy transmitting material enclosing a longitudinally extending filament. A longitudinally extending outer tubular sheath of infrared energy transmitting material coaxially receives the tubular enclosure. The outer sheath has a reflector which extends longitudinally substantially coextensive with the filament, and circumferentially with the sheath through at least 180 degrees to create a window through which the infrared energy is emitted. A cooling fluid may be passed through a space created between the inner envelope and outer sheath to allow higher power densities or to cool the outer sheath for use in explosive environments.