Imagine that you have a cosine grating (i.e., a transparency whose amplitude transmission profile is cosinusoidal) with a spatial period of 0.01mm. The grating is illuminated by quasimonochromatic plane waves of A = 500 nm, and the setup is the same as that of Fig. 13.31, where the focal lengths of the transform and imaging lenses are 2.0 m and 1.0 m, respectively.
a) Discuss the resulting pattern and design a filler that will pass only the first-order terms. Describe it in detail.
b) What will the image look like on 2/ with that filter in place?
c) How might you pass only the dc term, and what would the image look like then?
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