光谱辐射亮度和光谱辐射照度的量值是根据普朗克定律建立的。当绝对黑体的温度被准确测量，其光谱辐射亮度和光谱辐射照度可通过普朗克公式算出。中国计量科学研究院建立的光谱辐射亮度和光谱辐射照度基准装置由高温黑体、光电高温计和自动光谱辐射计组成。通过替代比较方法将 The spectral radiance and the spectral irradiance are built according to Planck’s law. When the absolute temperature of blackbody is measured accurately, its spectral radiance and spectral irradiance can be calculated by Planck’s formula. China Institute of Metrology established spectral radiance and spectral irradiance reference device by the high temperature blackbody, photoelectric pyrometer and automatic spectral radiometer. By alternative comparison method will be