一、前言国际实用温标(IPTS—68)中金凝固点(1337.58 K)以上温度是用两个黑体源的光谱辐射亮度之比定义的,其中一个黑体源是金点黑体。因此,为复现和传递辐射温标需要对两源的光谱辐射亮度之比进行精密的测量。最近,美国标准局用光谱辐射计进行了上述测量,该辐射计由计算机控制的数据采集系统操 I. INTRODUCTION International Practical Temperature Scale (IPTS-68) CICC freezing point (1337.58 K) The above temperature is defined by the ratio of the spectral radiance of two black body sources, one of which is black gold. Therefore, to reproduce and transmit the radiation temperature scale, it is necessary to make a precise measurement of the ratio of the spectral radiance of the two sources. Recently, the United States Bureau of Standards conducted the above measurements with a spectroradiometer, which is controlled by a computer-controlled data acquisition system