A QUASI-STATIONARY FIELD OF THE THERMAL-RADIATION IN THE THEORY OF CONTACT RADIOTHERMOMETRY

An electrodynamic problem has been solved on the thermal radiation of nonuniformly heated semi-space received by the antenna of arbitrary diameter located at an arbitrary distance from the surface of radiating medium. An integral relation has been obtained which connects the received power with the depth temperature profile of the medium taking into account the quasi-stationary thermal radiation. Conditions have been found for which the consideration of quasi-stationary field leads to essential corrections relative to the results of the ray theory. The effects obtained are analysed applicable to the problem of the definition of the internal temperature of bioobjects by the method of contact radiothermometry.