The Investigation Of Filter Radiometers In Thermodynamic Temperature Measurement

Based on the Cryogenic radiometer, the absolute radiation thermodynamic temperature measurement is one of the accurate methods in the thermodynamic temperature, it is also the main method of temperature measurement available currently. Now a more academic value, also more difficult measurement called the absolute radiation thermometer has been adopted and established firstly in National Institute of Metrology P.R.China. The measurement results of absolute dividing research,silver fixed-point and high-temperature fixed point thermodynamic temperature measurement will provide the technical basis for the Themperature Scale ITS-90、thermodynamic temperature data for the development of new international temperature scale and enhance the overall national high temperature standard.In this paper, The absolute spectral responsivity of filter radiometer had been measured and analysed with trap detector based on Cryogenic radiometer and the tungsten halogen lamp-monochromator source as comparison light through experiments.This article focus on the performance of experiment device of spectral responsivity,we analyzed the stability of ligh,wavelenghth calibration and spectral responsivity experimental,Finally the result of thermodynamic temperature of silver fixed point had been got by deep research on the performance of experiment device and analysis of the stability of ligh,wavelenghth calibration and spectral responsivity experiment.