红外辐射计、辐射温度计及某些光电转换元件的标定问题,是从事光度和温度测量工作者极为关心的问题。目前,广泛采用各种形式的黑体炉作为标准辐射源进行分度。但是,对于大目标的测量仪器,必须应用大口径炉,这样一来,既会造成能源的浪费,又将使黑体质量降低。因此,设法使用由许多小棱柱形空腔拼合的大面积黑体,做为标准辐射源,既节省能 The problem of calibration of infrared radiometers, radiation thermometers and some photoelectric conversion elements is of great concern to luminosity and temperature measurement workers. Currently, various forms of blackbody furnaces are widely used as a standard radiation source for indexing. However, for large-scale measuring instruments, large-caliber furnaces must be used, which will not only result in the waste of energy, but also reduce the quality of black-body. Therefore, trying to use a large number of small prismatic cavities put together a large area of ​​black body, as a standard radiation source, saving energy