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Simulating far-infrared scenarios with the radiance synthetic imaging system

: Utz, A.; Gendrisch, L.; Vogt, H.


Computing in science and engineering 13 (2011), Nr.4, S.98-103
ISSN: 1521-9615
Fraunhofer IMS ()
Infrarot; Simulation; ray tracing; RADIANCE; infrared

Infrared cameras with passive, uncooled sensor chips utilize the far infrared domain of the electromagnetic spectrum for image generation. This spectral range reaches from 8 to 14?m wavelength. Reason for this is, that every object is self luminous at room temperature at that wavelength. So every surface acts as a source of radiation in a far infrared scenario. To gain an impression and to model the effects and circumstances in an infrared scenario, a simulation method is required. In the visual domain this task is accomplished by ray-tracing software, which allows the generation of synthetic images as well as the analysis of irradiance distribution in a given scene. In this article we demonstrate a way to apply one of such ray-tracers to a FIR scenario and show the physical correctness by comparing the results with analytical calculations for a very basic scenario. We will also demonstrate a possible application of the proposed simulation method.