作　　者： ; ; ;

机构地区： 哈尔滨工业大学航天学院空间光学工程研究中心

出　　处： 《光电工程》 2006年第4期39-43,共5页

摘　　要： 根据傅里叶成像理论,分析了光学合成孔径系统成像原理,指出光瞳函数的离散化,提高了光学合成孔径成像系统的分辨本领,但降低了系统传函中频性能,并使系统在信息获取时具有方向选择性。运用遗传算法对光瞳构形进行优化,光瞳优化后,四孔径系统的优化参数从310.8降到13.7,减小了23倍。在合成孔径成像系统单个子孔径存在像差的情况下,Piston误差对系统的影响最大,其次是离焦误差、倾斜误差、球差、彗差和像散,对于四孔径系统,Piston误差对系统的影响几乎是离焦误差的2倍,像散的4倍。系统曝光时间与填充比的平方或立方成反比。 Based on Fourier imaging theory, the performances of optical synthetic aperture imaging system are analyzed. Pupil function is not continuous, so optical synthetic aperture imaging system gets higher resolution at the cost of the loss of mid-spatial frequency of Modulation Transfer Function （MTF） The information translated by the system is different in all directions. The pupil configurations are optimized by the genetic algorithms. The parameter of optimal four aperture system is changed from 310.8 to 13.7, and decreased nearly 23 times. When one element of an N-element array is aberrated, the most sensitive aberration is Piston error, and then the sensitive aberrations are element defocus, tilt, spherical aberration, coma and astigmatism. As for four aperture system, the influence of Piston error is 2 times larger than that of defocus, and 4 times larger than that of astigmatism. Imaging integration time is inversely proportional to the square or cube of the fill factor.

关 键 词： 成像系统 合成孔径 光学传递函数 图像恢复 空间光学

领　　域： [机械工程] [机械工程] [机械工程]