一种新型偏振辐射计

偏振探测技术应用于大气散射辐射偏振特性测量,由于大气散射偏振态的时空变化特性,要求测量仪器具有实时获取偏振数据的能力。针对这一需求研制了一种新型偏振辐射计,提出了利用偏振透光轴三方向光路平行探测的方案,能够实时获取目标的偏振特性参数。着重分析系统软硬件结构设计,介绍了一种以USB采集卡为核心的信号采集系统,并利用积分球光源对系统进行相对辐射定标,分析了定标数据。实验结果表明,该套系统能够满足大气偏振探测的要求。

A New Type of Polarimeter

The technique of polarization has been applied to measure the polarization properties of atmospheric scattering radiation. The state of polarization of atmospheric scattering has the mutable character in time and space. It requires that the instrument has the capacity of obtaining the measurement data in real-time. A new type of polarimeter has been developed for this requirement. The radiation value of three polarized transmission optical axis is obtained at the same time using this mode of system, which can get polarized characteristic of target in real-time. The structure design of software and hardware is presented. A kind of signal sampling system is introduced. This system uses the USB sampling card as its core component. The instrument is calibrated using of integral sphere. The calibration data are analyzed. The results show that the system meets the requirement of atmospheric polarization detection.