针对辐射温度计检定中的有关测量距离、瞄准方法和附加光阑等技术问题进行了讨论。根据检定温度不同，提出了利用测量信号的最大化和最小化原理来确定最佳测量距离的方法。对瞄准腔底和瞄准腔口两种瞄准方法进行了比较与分析，得出瞄准腔底的方法具有更大的可靠性和准确性。此外，针对辐射源尺寸效应（SSE），给出了由 SSE 而产生的温度修正公式。%The several technical problems such as the measurement distance,aiming method and additional aperture in the calibration of working radiation thermometer are discussed. A method for determining measurement distance is presented,which is according to the maximization and minimization principles of measurement signals in different test temperatures. Two aiming methods are compared and analyzed,and the correlative conclusion is that the method of targeting the bottom cavity is of greater reliability and accuracy. In addition,for the radiation source size effect(SSE),the temperature correction formula generated by SSE is given.
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