| 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？ [< f\+g2ct
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 ddlLS
[^~Fu9+"
SYSTEM NEW )Q 6R6 xW
RESET 0gfa7+Y
*9?-JBT&F
UNITS MM e)7[weGN
WAVELENGTHS 3.7 UM n1.]5c3p
K ^s!0[6
COATING PROPERTIES @ZD1HA,h"
1 0 'REFLECT' h_x"/z&
0 0 'ABSORB' q=UKL`;C}U
: 4&qASn
PARABASAL 4 @x"vGYKd
BEAMS COHERENT DIFFRACT l)=Rj `M
WIDTHS 1.6 & UL(r
d8dREhK&
A=1 YX!%R]c%
N=32 waO* CjxE:
L=(N)*(A) (Dq3e9fX
D1=0.625E-3 _@jl9<t=_
D2=(N)*(D1) ^<[oKi;>
!! 微阶梯镜======================= <iJ->$
$DO -16 15 1 $*L@ y m
{SURFACE O' A''}M
PLANE Z 0 RECTANGLE (A)/2 (L)/2 FU5vo
OBJECT 'MIRROR2_?' osPX%k!yw
INTERFACE COATING REFLECT AIR AIR `m@ 06Q
SHIFT X (A)*?+(A)/2 s26:(J
[{
SHIFT Z (D2)*? &hyr""NkAm
} AEOo]b*&d
GROUP MIRROR2_? u{tjB/K&
SHIFT Z (L) VO#]IXaP
ROTATE X -90 0 0 qmtV k
!! DETECTOR====================== > L?/Ph %d
SURFACE @M:j~
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 h* h+VM
OBJECT 'DETECTOR' L ?4c8!Q
INTERFACE COATING ABSORB AIR AIR +%$!sp?
!! SOURCE ======================= n=L;(jp<j
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) a}0\kDe
SOURCE DIR 0 1 0 qW $IpuK
!! !!TRACE PLOT========================= X.%Xi'H
!!WINDOW Y Z t 0nGZ%`
!!PLOT FACETS 5 5 !!OVERLAY 2 ,E&}a|;b
TRACE!! PLOT -O^ b
!!$VIEW i1\xZ<|0
b ]1Su L
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY @C~TD)K
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 +:mj]`=
PIXELS (256) O&E1(M|*>
SPREAD NORMAL gO gZ
DISPLAY %* vYX0W"
!! FORM 0.5 Uk6Y6mU V
PICTURE x4 4)o:
RETURN
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