A THEORY OF SCANNING 



513 



>. -0.1 



-1.6 -1.4 -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 



n'-n ? 



N" N 



0.2 04 0.6 



^-0.1 



-1.0 -0.8 -0.6 -0.4 -0.2 



0.2 0.4 0.6 0.8 10 1.2 1.4 



0.'=I1 I 

 N N 



0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 



n. 



N 



Fig. 27 — Sinusoidal aperture with two-thirds wavelength overlap. 



