子孔径布局对拼接光学系统像质的影响

Effect of Sub-aperture Distribution on Optical Stitching System

由衍射理论模型出发,分析了子孔径布局对光学系统点扩散函数的影响,从而进行傅里叶变换计算出其对光学系统光学传递函数的影响;并由光学设计软件内嵌程序将子孔径布局实际地加入到设计的光学系统中,分析各种不同子孔径布局对光学系统像质的影响.通过由衍射理论出发的计算结果与设计软件内嵌程序的模拟仿真结果的对比,软件内嵌程序的模拟仿真结果得以验证.针对子孔径布局对具有相同相对孔径光学系统的影响进行了仿真计算,对与子孔径拼接原理样机具有相同相对孔径和中心遮拦比的反射式光学系统,针对相同孔径布局对其光学传递函数的影响进行了实际测试,通过仿真计算结果与测试结果的对比分析表明,孔径布局对具有相同相对孔径拼接光学系统的光学传递函数影响趋势一致的结论,从而为子孔径拼接原理样机研究的实用性及像质检测提供了理论依据.

Based on diffraction theory,effect of sub-aperture on point spread function of stitching system is analyzed,and after Fourier transformation of point spread function,effect on the Modulus of the OTF is acquired.The sub-aperture distribution is added to the real designed optical system through embedded program,and effect of sub-aperture distribution on image quality of stitching system is simulated.Through contrast of calculation result from diffraction theory and simulated result by design software embedded program,the simulated result is verified.Effects of sub-aperture distribution on optical systems with the same relative aperture are simulated.For reflective systems which have the same relative aperture and central-obscuration,effect of sub-aperture distribution on optical stitching system is tested.After comparision of simulated result and tested result,it is shown that,effect of sub-aperture distribution on optical stitching systems with the same relative aperture is uniform.It provides theoritical proof for practability of study on optical stitching prototype.