Ojeda-Castañeda J, Castro A
School of Science, University of Las Americas, Cholula 72820, Puebla, Mexico.
Opt Lett. 1998 Jul 1;23(13):1049-51. doi: 10.1364/ol.23.001049.
We show that by using a binary spatial filter and a square-law detector we can display all the defocused optical transfer functions (OTF's) in a given study in a single picture. The resulting unique picture has as its horizontal coordinates the spatial frequency and as its vertical coordinates the amount of defocus. The gray-level variations are proportional to the modulus of the OTF, that is, the modulation transfer function. Numerical simulations are included.
我们表明，通过使用二元空间滤波器和平方律探测器，我们可以在一张图片中显示给定研究中所有离焦光学传递函数（OTF）。得到的独特图片以空间频率作为其水平坐标，以离焦量作为其垂直坐标。灰度级变化与OTF的模成正比，即调制传递函数。文中包含了数值模拟。
