多波段光谱辐亮度计量值溯源技术研究

光谱辐亮度计是实现空间遥感仪器在地面实验室内进行高精度光谱定标的关键设备之一，本文基于标准探测器的辐亮度传递原理，利用视场光阑、孔径光阑、窄带滤光片和光电二极管研制了10测量通道的遮光筒式多波段光谱辐亮度计，测量波长分布在（400~1 100）nm范围。具有校准通道，与积分球单色光源匹配使用，实现光谱辐亮度的量值溯源，测量不确定度优于2.2%。

Research on Traceability of Multi-band Spectral Radiometer

Spectral radiance meter is one of the key equipments to realize high precision spectral calibration of space remote sensing instrument in ground laboratory.Based on the radiance transfer principle of standard detector,a multiband light shield with 10 measuring channels is developed by using field of view aperture,narrow-band interference filter and silicon photodiode.Spectral radiometer,the measured wavelength is in the range of 400 to 1100 nm.The instrument has a calibration channel and matches with the integral sphere monochrome light source to realize traceability of spectral radiance.The uncertainty of measurement is better than 2.2%.