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为了验证高数值孔径、大入射角、宽光谱的空间光学系统中偏振像差的存在,在激光数字波面干涉仪上对偏振像差进行了实验研究并做了数据分析。论述了偏振像差的两种计算方法,即偏振像差函数的二次扩展式和偏振光线追迹。用软件对激光数字波面干涉仪光学系统分别进行普通光线追迹和偏振光线追迹,PV值增加了33.59%。然后在该系统上对偏振像差进行了实验研究,PV值增加了34.48%。可以看出二者基本吻合。第一次在激光数字波面干涉仪上模拟了空间光学系统,并通过实验证实了改变入射光的偏振态可以改变系统的偏振像差。将实验测得的结果和软件模拟的结果比较后证实了光学系统中偏振像差的存在。
In order to verify the existence of polarization aberration in the space optical system with high numerical aperture, large angle of incidence and wide spectrum, the polarization aberration was experimentally studied and analyzed by laser digital interferometer. Two calculation methods of polarization aberration are discussed, that is, the quadratic extension of polarization aberration function and the polarization ray tracing. Using software to conduct ordinary ray tracing and polarization ray tracing for laser digital interferometer optical system respectively, the PV value increased by 33.59%. Then the polarization aberration was experimentally studied on this system, the PV value increased 34.48%. It can be seen that the two basically match. For the first time, a space optical system is simulated on a laser digital surface interferometer. Experiments show that changing the polarization state of incident light can change the system’s polarization aberration. Comparing the experimentally measured results with those of the software simulations confirmed the existence of polarization aberrations in the optical system.