如下程序，平面光源以一定角度發(fā)射光線至與其平行的探測器上，怎么計算得到的波前有84個波長��？ f"zXiUV  
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UNITS MM aA?Uf~ "t  
WAVELENGTHS 1.064 UM FUic
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SURFACE   >4>!zZ  
  PLANE Y -30 RECT 10 0.85 `0Y`]kSY+  
  SHIFT X 0 :DTKZ9>2D  
  SHIFT Z 10 o(GXv3L  
  OBJECT 'DETECTOR' ?IR]y-r  
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BEAMS INCOHERENT GEOMETRIC     1'or[Os3=  
FRESNEL TIR 4.:2!Q  
WAVELENGTHS 1.064 <rZ(B>$  
GRID RECT Y -34.50204 0 20 -0.8 0.8 10 10 4}@J]_]Z  
SOURCE DIR SIN[8.4089] COS[8.4089] 0   k

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!!SOURCE DIR Y 81.5911 P` Hxj> {  
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WINDOW X Y m~cz  
WINDOW 1.1 u`I&&  
!!PROFILES OVERLAY 'SINGLET (on-axis and 7 degrees off-axis beam)' I8;xuutc  
PLOT FACETS 3 3 OVERLAY 7\>P@s
  
TRACE PLOT     D#}t)$"  
$VIEW     U~8;y'  
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CONSIDER ONLY DETECTOR #zflU99d