Patent ID: 6609824
Filing Date: 2003-08-26
Classification: G01J

Abstract:
A radiation thermometer comprising:an infrared ray sensor for detecting infrared radiation radiated from a measurement object and providing a sensor output; a sensor temperature measuring portion for measuring the temperature of said infrared ray sensor, the temperature corresponding to a sensor temperature; and means for calculating the temperature of the measurement object based on said sensor output and said sensor temperature, wherein said means for calculating the temperature of the measurement object 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 radiation from said measurement object is detected by said infrared ray sensor, and calculates the temperature of the measurement object based on a first difference, which is a difference between the sensor temperature and the sensor reference temperature, a second difference, which is a difference between the sensor output detected by said infrared ray sensor and the sensor reference output, and the reference temperature for the measurement object.