| yuwenhui2008 |
2015-07-26 20:41 |
用ASAP高斯光束分解的方法遇到的问题
各位光学专业的大神，我最近在用ASAP对微阶梯反射镜（如附图）进行模拟。一束单色平行光垂直入射到微阶梯反射镜上，用探测器接收反射光。如图，理论上在探测器上应该也是均匀的光场，但是用ＡＳＡＰ的高斯光束分解模拟得到的结果却如图所示。这是为什么呢？ =K2Dxu_:
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 -"5x? \.{m
O?@1</r ^
SYSTEM NEW 8xmw-s)
RESET G?QFF6)}!
k>{i_`*
UNITS MM =ox#qg.5
WAVELENGTHS 3.7 UM ;? ;D (%L
CGg:e:4
COATING PROPERTIES =!xeki]|9
1 0 'REFLECT' XzQ=8r>l
0 0 'ABSORB' 6__@?XzJ
q 9qmz [
PARABASAL 4 G;Y,C<)0k
BEAMS COHERENT DIFFRACT .]Z M2
WIDTHS 1.6 "}K/ b
+nd 'Uf
A=1 ^Gv<Xl
N=32 GT%V,OJ
L=(N)*(A) X5wS6v)#(
D1=0.625E-3 H'I|tPs
D2=(N)*(D1) #2DH_P
!! 微阶梯镜======================= z$G?J+?J
$DO -16 15 1 [
H>MeeR
{SURFACE |]A{8BBC
PLANE Z 0 RECTANGLE (A)/2 (L)/2 ~N[hY1}X[
OBJECT 'MIRROR2_?' RYE::[O7
INTERFACE COATING REFLECT AIR AIR joDfvY*[
SHIFT X (A)*?+(A)/2 =
k3O4gE7
SHIFT Z (D2)*? :G^`LyO M
} 5?;'26iC
GROUP MIRROR2_? SX^f h.
SHIFT Z (L) K?[pCF2C
ROTATE X -90 0 0 %~p_b Kd~
!! DETECTOR====================== e+y< a~N
SURFACE 9 b]U&A$
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 kTi QO2 H
OBJECT 'DETECTOR' }C*o;'o5G
INTERFACE COATING ABSORB AIR AIR T|.Q81.NE
!! SOURCE ======================= 10#!{].#x
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) HC{|D>x.
SOURCE DIR 0 1 0 )SA$hwR
!! !!TRACE PLOT========================= ZX'{o9+w5
!!WINDOW Y Z V"$t>pAG
!!PLOT FACETS 5 5 !!OVERLAY + {hxEDz
TRACE!! PLOT =_":Z!_
!!$VIEW }#'KME4
tEN]0`
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY %- A8 `lf<
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 Z$zUy |s[
PIXELS (256) 1r~lh#_8
SPREAD NORMAL =AD/5E,3
DISPLAY eU%5CVH.v
!! FORM 0.5 i"rMP#7
PICTURE +ypG<VBx%
RETURN
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