Radiation thermometer, temperature measurement method and temperature measurement program

Abstract

The present invention is equipped with two infrared ray detection units 1, 1' which each have a prescribed measurement field of view and detect the quantity of infrared rays which are incident from said measurement field of view, and also equipped with a temperature calculation unit 2 for calculating the temperature of the measurement target region Xa on the basis of the infrared ray quantity detected by each of the infrared ray detection units 1, 1'. Therein, the measurement target region Xa enters the measurement field of view of each of the infrared ray detection units 1, 1', and the size of each measurement field of view with the measurement target region Xa as a reference is set so as to differ from one another.