Detector 1 



Detector 2 



X 



FIGURE 8. DETECTOR GEOMETRY 



Let £, = K cose and m = K sine 

 and 



/2 2 Y 



D = /X + Y , i|; = Arctan ^ 



or 



X = D cosi|j and Y = D sin i). 

 Using the above changes of variable, we get 



P7>^X0 = J jS(K8fUxp[i£'n(KDcosacosi|i-».KOSJNesiNij»)j 



KiKdie 



V O 



ir -o 



p''rxx,f^=jJs(K^e,f)Exp[iairKDcos(e-(|)jKAKde 



-IT 6 -^ (7.1 



3) 



34 



