Lecture 22 Notes: Coherent and Incoherent Imaging Systems/CTF/OTF/MTF/PSF
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Description
We saw above that coherent systems are linear in field amplitude, which is complex. In our previous discussion, we constructed a LSI system defined by the convolution equation.
For many applications we find that it is much easier to represent our physical quantities in terms of complex numbers rather than just using real numbers alone. The concept of complex numbers comes from the continuation of functions such as square-root and logarithm that only apply to positive...