摘要
针对实验室高星等目标模拟问题,设计了一种由光源、可调光阑、积分球、光电探测器和平行光管组成的弱光单星模拟器,用于检测探测相机、星敏感器的星等探测能力。推导了光电探测器读数、积分球出口光谱辐亮度随可调光阑遮拦比的变化关系,结合星等定义公式和像面照度公式,介绍了弱光单星模拟器的工作原理,解决了高星等目标的标定难题。理论分析了弱光单星模拟器的星等模拟范围及精度,结果表明其最高可模拟19.5 Mv星等,精度为11.6%;模拟低于15 Mv星等时,精度优于8%。实验结果表明:实验室内,模拟星等与KLL-04型弱光照度计实测星等的相对误差最大为7.09%;实验室的探测相机与天文观测的探测相机所测得的星等探测能力在6.5Mv处的相对误差为1.9%,在15.2Mv处的相对误差为2.6%。所设计弱光单星模拟器能够对高星等目标进行有效模拟。
Aiming at the problem of high magnitude target simulation in the lab,a weak-light single star simulator（WLSSS）consisting of light source,adjustable diaphragm,integrating sphere,photoelectric detector and collimator is developed to measure the magnitude detecting ability of detecting cameras and star sensors.The relationship between the readings of photoelectric detector,the spectral radiance in the outlet of integrating sphere and tunable obscuration ratio is deduced.Combining the magnitude definition formula and the image illuminance equation formula,the operation principle of weak-light single star simulator is introduced,and the calibration challenge of high magnitude target is solved.The magnitude simulation range and precision of WLSSS are theoretically analyzed,and results show that the highest simulating magnitude is 19.5 Mv,and the precision is 11.6%.When the simulation magnitude is lower than 15 Mv,its precision is better than 8%.Experiment results show that in the lab,the maximum relative error between simulated magnitudes and KLL-04 wide-range illuminator tested magnitudes is 7.09%.The relative error of measured magnitude detecting ability between laboratory and astro-observation detecting cameras is 1.9%in6.5 Mv,and 2.6%in 15.2 Mv.The designed WLSSS can effectively simulate high magnitude targets.
作者
刘尚阔
薛勋
李坤
曹昆
赵建科
周艳
姚保利
Liu Shangkuo;Xue Xun;Li Kun;Cao Kun;Zhao Jianke;Zhou Yan;Yao Baoli(Xi＇an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi＇ an, Shaanxi 710119, China;University of Chinese Academy of Sciences, Beijing 100049, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2017年第10期161-168,共8页
Acta Optica Sinica
关键词
测量
星模拟器
光电探测器
高星等
地面标定
measurement
star simulator
photoelectric detector
high magnitude
ground calibration
