Abstract
A new method for measurement of diffuse property of a rough surface in the thermal infrared is proposed. This method is based on the fact that the spatial distribution of sensitivity in the field of view of a radiometer is broadened by reflection on the rough surface. In the present method, the diffuse property is measured as a spatial transfer function which describes the change of sensitivity distribution between before and after the reflection. The transfer function is independent of the size of the field of view of an actual radiometer and the lack of uniformity of sensitivity distribution in it.
In this paper, we discuss the algorithm for reconstruction of the spatial distribution of sensitivity and for estimation of the spatial transfer function. A mathematical model for description of diffuse property and measured diffuse property of some objects are also shown.
