Infrared radiation source arrangement

Details Infrared radiation source arrangement Infrared radiation source arrangement

G - Physics

01

J

315/25, 345/53,

G01J 3/10 (2006.01) H05B 3/26 (2006.01)

Patent

CA 1229654

ABSTRACT: 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 ap- plication of a time dependent electric current thereto. Two or more films may form a radiation group (array) in which each film (2a, 2b) is adapted to be energized se- parately 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 dis- tinguished 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.

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