We offer measurements of thermal conductivity and thermal diffusivity by optical laser scanning technology. This provides measurements that are non-destructive without strict requirements to the shape, dimensions, and quality of the sample surfaces.
In addition optical scanning technology has several benefits compared to other methods (e.g. the divided bar or Middletons diffusivity method) by being capable of recording spatial distribution of thermal properties in heterogeneous matters as well as the determination of principal components of thermal conductivity of anisotropic solids at scanning of one or two surfaces.
The optical scanning method is a relatively new technology developed by professor Yuri Popov, Moscow Technical University. The optical scanning technology is based on the scanning of the plane or cylindrical surface (along the cylinder axis) of a studied samples with a focused, mobile and continuously operated heat source in combination with infrared temperature sensors. The determination of thermal conductivity values is based on the comparison of excessive temperatures of standard samples (having a known thermal conductivity kR
) with excessive temperatures of one or more unknown samples being under heating by the movable concentrated heat source. The thermal conductivity of unknown samples is calculated as a result of a comparison of the excessive temperatures using the standard thermal conductivity values.