光学稀疏孔径成像复合孔径阵列结构研究

对环型、Y型和Golay6等典型的光学稀疏孔径成像系统,给出了最大和最小填充因子,结果表明,最大填充因子只与子孔径的数目有关.提出一种建立在典型光学稀疏孔径阵型基础上的复合孔径阵列结构,给出了3种不同复合孔径阵列结构形式,在填充因子相同的情况下,用计算机仿真子孔径间距变化、子阵列旋转对调制传递函数(MTF)的影响,并对系统模拟成像及噪后的图像进行重构,使用相关系数对图像质量进行评价.结果表明,这种复合孔径阵列结构通过复制子阵列能够扩大系统的口径,而且具有易于加工、装调方便的特点.

Multiple-array Configuration Design of Optical Sparse-Aperture Imaging System

Optical sparse-aperture system can be designed to obtain high resolution in astronomical object imaging with several.Maximal and minimum fill factors of the sparse-aperture systems are presented,with the examples of annulus,Golay6 and tri-arm.A novel model named sparse-aperture multiple-array system is also proposed,and three kinds of configuration models have been illustrated.We compare the imaging performance of different multiple-array configurations by using the modulation transfer function(MTF).The results show that the variety of space between sub-aperture and the rotation of sub-array of multiple-array configurations have the effects on multiple-array MTF,and the multiple-array configurations have te advantages of firm configuration and easy fabrication.