ANORDNING VED INFRAROED STRAALINGSKILDE

摘要

PCT No. PCT/NO83/00006 Sec. 371 Date Sep. 28, 1983 Sec. 102(e) Date Sep. 28, 1983 PCT Filed Feb. 16, 1983 PCT Pub. No. WO83/03001 PCT Pub. Date Sep. 1, 1983.Infrared radiation source arrangement, in particular for use in infrared spectral analysis. To an electrically insulating substrate (2) there is applied one and preferably at least two separate electrically conductive films (2a, 2b) adapted to be heated by application of a time dependent electric current thereto. Tow or more films may form a radiation group (array) in which each film (2a, 2b) is adapted to be energized separately with electric current from an electric drive circuit (1) for applying a time dependent, preferably pulse shaped electric current to the film or films, so that infrared radiation pulses are emitted. The electric current is time controlled in order that the radiation pulses from the respective films may be distinguished from each other in a detector (6). The thickness of the substrate and the thermal conductivity, specific heat and density of the substrate material are so chosen that the thermal time constant is adapted to the pulse frequency range of the drive circuit.