
FOURIER OPTICS 345
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Figure 11.5 (A) Imaging a knife-edge. The image is the convolution of the object with the PSF.
The transfer and PSFs are shown in Figure 11.4. The finite aperture limits the spatial frequency,
and its diffraction pattern introduces fringes into the image (C and dashed line in B). The Gaussian
apodization further degrades the resolution, but nearly eliminates ...