Selection of the size of field of view in thermal imaging observations of small areas

The paper explains the effect of matrix resolution on the field of view of a single detector. The dependency of the field of view of a single detector as a function of distance between the lens of thermal imaging camera and the surface observed is shown. It was proposed how to select the lens of thermal imaging camera so that the obtained thermogram it would be able to achieve such a geometric resolution that would allow for sufficiently accurate mapping of temperature distribution on the surface observed.