位相复原技术在光学成像质量测评中的应用

对于大口径或特殊波段成像的光学系统，采用常规测试手段难以实现对光学系统成像质量的评估。而光学系统波像差是表征光学系统成像质量的重要指标之一。本文基于信息光学基础理论采用傅立叶变换和迭代算法通过对光学成像系统星点图像（光强点扩散函数PSF）计算分析，从而实现对光学成像系统位相的复原获得波像差信息。本文论述了有关的理论依据和分析计算公式；并研制了位相复原分析计算软件。通过计算机仿真与误差分析论证了研制的位相复原计算方法的正确性，复原误差小于5%。提出了在实际应用中采用此方法时减少复原误差的一种途径。通过实际采集的光学系统星点图像的位相复原实验验证了位相复原分析软件的适用性。此方法为非常规光学成像系统波相差的评估工作提供了新途径。

Application of phase retrieval technology in evaluation of optical imaging system

It is difficult to evaluate the large and multi-wave band optical imaging system performance in general testing ways. The wave front of optical system is the one of import parameters which represents imaging quality. The fundamental theories of information optics and phase retrieval have been applied. The point image of optical imaging system ( intensity point separate function ) was analyzed and computed. The wave font of optical system has been retrieved by the Fourier transform and an iterative approach. The related theory is discussed and algorithm model is presented. The compute software of phase retrieval has been made. The validity of compute software is proved by the computer imitation. The phase retrieval error is estimated and is less than 5% . The way which would reduce the phase retrieval error has been suggested when the technology is applied. Through detecting and analyzing the PSF imaging of optical system in the lab, the experimental results indicate that the computer software of phase retrieval is efficacious. So it is shown that the novel method is suited to retrieve wave front of optical systems.