| 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？ 'u PI~l`g
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 @(/$;I,
vE t=enQ
SYSTEM NEW Xhyc2DKa_
RESET F+zH gE
0^P9)<k'
UNITS MM &z\?A2Mw%
WAVELENGTHS 3.7 UM q2Gm8>F1y.
F 9_X^#% L
COATING PROPERTIES r,,* k E
1 0 'REFLECT' V-%jSe <
0 0 'ABSORB' k fOd|-
ywjD.od"v
PARABASAL 4 #)DDQ?D
BEAMS COHERENT DIFFRACT t]t(/x#
WIDTHS 1.6 w &^Dbme
e oFM
A=1 X =Y>9
N=32 wXeJjE%j:3
L=(N)*(A) mk-L3H1@J3
D1=0.625E-3 g>?,,y6/w
D2=(N)*(D1) >\ Iy <M
!! 微阶梯镜======================= & ~)1mnv.
$DO -16 15 1 <UwA5X`0e.
{SURFACE rt! lc-g%/
PLANE Z 0 RECTANGLE (A)/2 (L)/2 [H RP&jr
OBJECT 'MIRROR2_?' yrMakT =
INTERFACE COATING REFLECT AIR AIR vf<Tq
SHIFT X (A)*?+(A)/2 "X1{ *
SHIFT Z (D2)*? y9GaxW* &
} :; 3y^!
GROUP MIRROR2_? y5V]uQSD
SHIFT Z (L) 7:)$ oH
ROTATE X -90 0 0 lg COp%>
!! DETECTOR====================== 1z8 AK"8
SURFACE O;;vz+ j
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 Q0_|?]v
OBJECT 'DETECTOR' :e4[isI
INTERFACE COATING ABSORB AIR AIR `{@?O%UB
!! SOURCE ======================= J}&xS<
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) A$'rT |>se
SOURCE DIR 0 1 0
0c:j wtf
!! !!TRACE PLOT========================= q1M16qv5
!!WINDOW Y Z X@7e 7
!!PLOT FACETS 5 5 !!OVERLAY j0K}nS\ P
TRACE!! PLOT V V~Kgy
!!$VIEW 8:UV; 5@
2fJ2o[v
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY -} <W|r
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 Z}6H529[
PIXELS (256) Zh.9j7
>p
SPREAD NORMAL |(1z ?Spbe
DISPLAY Kd,7x'h`E
!! FORM 0.5 %xI,A '#
PICTURE g~= #8nJ
RETURN
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