Temperature and emissivity determination of small-size long-range object’s using staring Thermovision Cameras

The possibilities and limitations of remote temperature and emissivity coefficient determination of small-size distant objects in the condition of spatially distributed background illumination using measurements of the electronic signals of infrared images formed by Thermovision Cameras with staring FPA’s have been studied. It is shown that the expression for the total video signal amplitude measured from a “point” image of the object in the presence of a background consists of several components, of which the decisive role is played by the signals from the object and the illuminating background. The conditions and constraints providing an analytical solution of obtained four equations have been defined and the expressions for determination of the absolute thermodynamic temperature and emissivity coefficient of a small-size object surface have been obtained.