As shown in Fig. 6.18, by using a convex lens with focal length f , the Fourier transform of the...

Question

As shown in Fig. 6.18, by using a convex lens with focal length f , the Fourier

transform of the input g(x0, y0) is to be obtained on the screen placed at the back

focal plane of the lens. In order to eliminate the phase factor associated with the

Fourier transform, as seen in (6.19), convex lens is placed on the surface of the

screen. What should the focal length of the convex lens be?

Dr Shweta · Accepted Answer

Solution: 
·  In the above combination firstly, the source is at distance f from convex lens L0 so its image will be real and inverted and form at a distance f.

As shown in Fig. 6.18, by using a convex lens with focal length f , the Fourier transform of the input g(x0, y0) is to be obtained on the screen placed at the back focal plane of the lens. In order to...

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