Question

EXERCISE 4.3-1 Fraunhofer Diffraction from a Rectangular Aperture. Verify that the Fraunhofer diffraction pattern from a rectangular aperture, of height and width D, and Dy respectively, observed at a distance d is I(a,y)- I, sine ine D ad Ad ' (4.3-6) where I,(D, Du/Ad)2I, is the peak intensity and sinc(xin(a)/() Verify that the first zeros of this pattern occur at diffracted light is given by -Ad/D, and y- ŁAd/Dy, so that the angular divergence of the (4.3-7) If DyくD,, the diffraction pattern is wider in the y direction than in the z direction, as illustrated in Fig. 4.3-3. Diffraction 1O, y) Aperture By Dx 0 Figure 4.3-3 Fraunhofer diffaction from a rectangular aperture. The central lobe of the pattern has half-angular widths 0, VD, and e,ND,

Answer 1

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