Mueller M R, Carlson F P
Appl Opt. 1976 Mar 1;15(3):690-5. doi: 10.1364/AO.15.000690.
The basic Fourier optical transform operation that exists between the front and rear focal planes of a coherently illuminated lens is examined from the viewpoint of spatial bandlimiting. It is common to regard this relationship as exact in its application to optical data processors, but in reality, finite size lens and pupil functions impose spatial bandlimiting that smooths or broadens the fields in the transform domain. To reduce these effects, shaded apertures or apodizing filters are placed in the lens plane. Experimental data are presented to demonstrate that a noticeable improvement in resolution can be obtained by use of these filters.
从空间带宽限制的角度研究了相干照明透镜前后焦平面之间存在的基本傅里叶光学变换操作。在将这种关系应用于光学数据处理器时，通常认为它是精确的，但实际上，有限尺寸的透镜和光瞳函数会施加空间带宽限制，从而使变换域中的场平滑或展宽。为了减少这些影响，在透镜平面中放置了带阴影的孔径或变迹滤波器。给出的实验数据表明，使用这些滤波器可以在分辨率上获得显著提高。
