Harvey J E, Kotha A, Phillips R L
Appl Opt. 1995 Jun 1;34(16):2983-92. doi: 10.1364/AO.34.002983.
When a large aperture is synthesized with an array of smaller subapertures for high-resolution imaging applications, it is important not only to arrange the subapertures to achieve minimal spatial frequency redundancy but also to choose the size of the subapertures (i.e., the dilution ratio) necessary to achieve the best possible image quality. Spurious or ghost images often occur even for nonredundant dilute subaperture arrays. We show that array configurations producing a uniform modulation transfer function will not exhibit these undesirable ghost images. A prescription that is unique and original (to the best of our knowledge) is then presented for constructing both one-dimensional and two-dimensional configurations of dilute subaperture arrays that results in a uniform spatial frequency response with an arbitrarily high spatial resolution for reciprocal path-imaging applications.
当使用一系列较小的子孔径合成大孔径以用于高分辨率成像应用时，不仅要排列子孔径以实现最小的空间频率冗余，还要选择实现最佳图像质量所需的子孔径大小（即稀释率），这一点很重要。即使对于非冗余稀释子孔径阵列，也经常会出现伪像或重影图像。我们表明，产生均匀调制传递函数的阵列配置不会出现这些不良的重影图像。然后提出了一种独特且原创的（据我们所知）方法，用于构建一维和二维稀释子孔径阵列配置，该配置可为互易路径成像应用带来具有任意高空间分辨率的均匀空间频率响应。
