星上定标积分球标准光源—稳流源驱动器的研制  

Development of current stabilized source of standard lamp for spaceborne calibration integrating sphere

作　　者：李东景[1,2] 于平[1] 王小朋[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100039

出　　处：《光学精密工程》2010年第1期212-219,共8页Optics and Precision Engineering

基　　金：国防预研基金资助项目(No.05001SA050)

摘　　要：星上定标是成像光谱仪光谱图像数据定量化应用的基础。为了提高星上定标积分球系统的光源稳定性,减少积分球辐亮度变化率,针对积分球系统定标用的光源-卤钨灯对定标精度的影响,研制了一种控制卤钨灯发光强度稳定性的稳流电源。介绍了具有软启动特性的标准灯稳流驱动电源的工作原理及应用电路,研究了输入电压负载、温度等参数对电源性能的影响,并对稳流源电路进行了测试。通过改变三极管增益的方法调整软启动时间,采集串联在电路中的高精密电阻两端的电压,并计算电路中的电流,得到电流稳定性达到0.037%;增加重复性后,电流稳定性为0.043%。实验结果表明,得到的电流稳定精度满足了积分球系统光的变化不超过1%的要求。此积分球系统已成功应用于某型号成像光谱仪的星上定标。The onboard calibration is a basis of a spaceborne Hyper-spectral Imager（HSI）to obtain accurately quantified spectral imaging data.In order to enhance the stability of the tungsten-halogen lamps of the spaceborne calibration integral sphere and to reduce the change of the integral sphere radiance,a kind of current stabilized source for the tungsten-halogen lamps was developed.The operating principle and current stabilized circuit with a soft start characteristic were introduced.And the effects of some performance parameters,inputting voltage load,temperature and so on,on the properties of current stabilized source were analyzed.Then a test was carried out for the current stabilized source.Experimental results show that the current stability can be up to 0.037% by changing the transistor＇s gain to adjust the time of soft start,collecting the voltage of the high precision resistor and computing the value of the current.Furthermore,the current stability can be up to 0.043% after the repetition.These results also indicate that the accuracy of the current stability can satisfy the requirements that the change of integrating sphere radiance should be less than 1%.The integrating sphere system has been successfully applied to a HSI onboard calibration.

关 键 词：星上定标 标准灯 标准光源 稳流源 软启动特性 

分 类 号：TM923.32[电气工程—电力电子与电力传动] TM44