CAJ | 학술논문

针对目前光学口径不断增大的空间光学遥感器实验室辐射定标的需求，基于近距离扩展源照明方法设计了400～900 nm谱段内最大积分辐射亮度为200 W／（ m2· sr）的4 m直径均匀扩展定标光源。该定标光源内径为4000 mm，出光面直径为1600 mm。对该定标光源光机结构进行了详细设计，利用光纤光谱仪监视输出的相对光谱分布，CPLD结合单片机实现输出光谱辐亮度值无人值守智能化远程自动控制。使用PR 735光谱辐射计测量该光源400～900 nm谱段内最大积分辐射亮度为222.62 W／（ m2· sr），通过对定标光源的稳定性、面均匀性及角度均匀性测试，分析了定标光源的测量不确定度为3.57％。实验结果表明：该定标光源可以满足口径1600 mm以下可见／近红外空间光学载荷的实验室辐射定标需要，并可实现智能程控化控制，提高了定标测试精度。
침대목전광학구경불단증대적공간광학요감기실험실복사정표적수구，기우근거리확전원조명방법설계료400～900 nm보단내최대적분복사량도위200 W／（ m2· sr）적4 m직경균균확전정표광원。해정표광원내경위4000 mm，출광면직경위1600 mm。대해정표광원광궤결구진행료상세설계，이용광섬광보의감시수출적상대광보분포，CPLD결합단편궤실현수출광보복량도치무인치수지능화원정자동공제。사용PR 735광보복사계측량해광원400～900 nm보단내최대적분복사량도위222.62 W／（ m2· sr），통과대정표광원적은정성、면균균성급각도균균성측시，분석료정표광원적측량불학정도위3.57％。실험결과표명：해정표광원가이만족구경1600 mm이하가견／근홍외공간광학재하적실험실복사정표수요，병가실현지능정공화공제，제고료정표측시정도。
In order to meet the requirements of laboratory radiometric calibration for continually rising optical aperture of optical remote sensors, 4 m extended uniform source for radiometric calibration is designed based on near extended source method.The maximum integrated radiance in the range of 400 nm to 900 nm is 200 W/( m2 · sr) .The diameter of the calibration source is 4 000 mm and the exit port diameter is 1 600 mm.The opto-mechanical parameters of the calibration source are designed in detail.Using fiberoptic spectrometer to monitor relative spectral distribution, the calibration source can realize intelligent programma-ble remote control through CPLD combined with SCM to export specific integrated radiance.The maximum in-tegrated radiance in the range of 400 nm to 900 nm is measured 222.62 W/(m2· sr) using PR 735 spectrum radiometer.The measure uncertainty of the calibration source is analyzed by testing the radiation characteris-tics, including the stability, the uniformity,the lambertian, and the value is 3.57%.From the experimental results,the calibration source can satisfy the laboratory calibration needs for the visible/near-infrared optical remote sensors with the optical aperture under 1 600 mm.Meanwhile it can realize intelligent programmable control to improve the calibration accuracy.