| 摘要 |
A radiation thermometer capable of precise measurement without depending upon an absolute precision of an infrared ray sensor for detecting infrared ray or a temperature sensor for measuring a temperature of the infrared ray sensor is provided wherein, controlling means retains a reference temperature for the measurement object, a sensor reference temperature for the sensor, and a sensor reference output for the sensor output when infrared ray radiated from the object of measurement having the object of measurement reference temperature is detected by the infrared ray sensor having the sensor reference temperature, and calculates the temperature of measurement object based on a first difference as a difference between a sensor temperature to be measured by the sensor temperature measuring portion and a sensor reference temperature, a second difference as a difference between a sensor output to be detected by the infrared ray sensor and a sensor reference output and the object of measurement reference temperature.
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