轴对称综合孔径光学系统的调制传递函数和成像性质

MTF and imaging quality of axially symmetrical optical systems with synthetic aperture

摘要: 综合分析目前各种综合孔径光学系统的结构和成像特征，并对它们作了比较。使用数值模拟方法，对单环轴对称综合孔径光学系统和双环结构的轴对称系统进行分析，研究了轴对称综合孔径光学系统的结构形式及其调制传递函数(MTF)，并对其成像性质作了评估与比较。讨论了一种4+2双环结构的轴对称综合孔径系统的结构形式，对其成像特点作了详细描述，最后运用图像复原维纳滤波器对系统成像图做了处理，以使这种轴对称综合孔径系统具有更理想的成像效果。

Abstract: The mechanical and imaging characteristics of the synthetic aperture systems were analyzed and compared. By the aid of numerical simulation, the configurations and the modulation transfer functions (MTF) of axially symmetrical synthetic aperture systems with single ring and with dual rings were studied. The imaging qualities of these systems were evaluated and compared. A new axially symmetrical synthetic aperture system with 4+2 dual rings configuration was discussed. Its imaging characteristics were described in detail. The images produced by the new system were processed with Wiener filter to retrieve a better imaging effect.