| 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？
,)Z1&J?
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 zCI.^^<?
"P8 ( R
SYSTEM NEW UYvdzCUh
RESET Eu`K2_b
O[15x H,
UNITS MM v{o HC4
WAVELENGTHS 3.7 UM !m6=Us
R/Te ;z
COATING PROPERTIES m*'87a9q0
1 0 'REFLECT' Q&8epO |J
0 0 'ABSORB' 7O<K ?;I
$\q}A:
PARABASAL 4 {"mb)z r
BEAMS COHERENT DIFFRACT |G(I,EPag
WIDTHS 1.6 !a^'J bb
'DT q<`~?
A=1 MTAq} 8
N=32 .wf$]oQQ
L=(N)*(A) #D
.hZ=!
D1=0.625E-3 F&$~]R=&
D2=(N)*(D1) Cp^`-=r+
!! 微阶梯镜======================= q*7: L
$DO -16 15 1 g<^-[w4/
{SURFACE rn RWL4
PLANE Z 0 RECTANGLE (A)/2 (L)/2 lX/ :e=
OBJECT 'MIRROR2_?' h7J 4 p
INTERFACE COATING REFLECT AIR AIR T4h&ly5
f
SHIFT X (A)*?+(A)/2 2 sK\.yS
SHIFT Z (D2)*? <b_?[%(u
} n7pjj
GROUP MIRROR2_? gfQ1p ?
SHIFT Z (L) \T {<{<n
ROTATE X -90 0 0 M"5S
!! DETECTOR====================== A 1B_E X.
SURFACE nHl{'|~
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 zszx~LSvIT
OBJECT 'DETECTOR' bFsJqA.A
INTERFACE COATING ABSORB AIR AIR >j) y7DSE
!! SOURCE ======================= q@XxCP]
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) <`d;>r= 4z
SOURCE DIR 0 1 0 /A93mY[
!! !!TRACE PLOT========================= I \@`AU
!!WINDOW Y Z "z4V@gk
!!PLOT FACETS 5 5 !!OVERLAY =i>i ,>bv
TRACE!! PLOT EM!9_8 f
!!$VIEW +Sak_*fq
Yz ? 8n
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY w3 jcit|
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 b=XHE1^rM
PIXELS (256) 4ZtsLMwLD
SPREAD NORMAL Xp 0 S
DISPLAY y=LN| vkQ
!! FORM 0.5 PG@6*E
PICTURE
,P^4??' o
RETURN
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