kk9w@pur-ee.UUCP (Andersen) (03/01/84)
Babinet's principle is just sort of a fancy way of saying all diffraction gratings (, waves, structures, etc) with the exact same periodicity only differ by a dc value. In other words, to get a square wave of period 1 and duty cycle .5 with a high value of 1 and a low value of 0 you would use the same fourier series as you would to get the same square wave with max value .5 and min value -.5 except you would add .5 to the dc term. Dave