| 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？ *{DTxEy
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 0- )K_JV
v\Uk?V5T
SYSTEM NEW %'=*utOxy
RESET c>B1cR
tbd=A]B-
UNITS MM $ s/E } X
WAVELENGTHS 3.7 UM 20|`jxp
xV)[C )6
COATING PROPERTIES AAevN3a#nI
1 0 'REFLECT' :hX[8u
0 0 'ABSORB' \g39>;iR
9Ux (
PARABASAL 4 [X.bR$>
BEAMS COHERENT DIFFRACT ;=ddv@
WIDTHS 1.6 bP&Q Fc
YNEwX$)M,B
A=1 ?FQ#I~'<
N=32 `r`8N6NQ&]
L=(N)*(A) \!-BR0+y;
D1=0.625E-3 b|d-vnYE
D2=(N)*(D1) f<Hi=Qpm
!! 微阶梯镜======================= $v|W2k
$DO -16 15 1 D(AH3`*|#
{SURFACE 8b2 =n
PLANE Z 0 RECTANGLE (A)/2 (L)/2 1`&`y%c?B
OBJECT 'MIRROR2_?' faDSyBL o
INTERFACE COATING REFLECT AIR AIR d#g))f;
SHIFT X (A)*?+(A)/2 &0F' Ca
SHIFT Z (D2)*? to'7o8Z
} u5(8k_7
GROUP MIRROR2_? *VZ|I dp
SHIFT Z (L) /, Xl8<~#
ROTATE X -90 0 0 &]nx^C8V;
!! DETECTOR====================== iVXt@[
SURFACE 2?JV "O=
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 r7m ~.M+W"
OBJECT 'DETECTOR' \#{PV\x:Nn
INTERFACE COATING ABSORB AIR AIR 5?kf E
!! SOURCE ======================= ZSC*{dD$ E
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256)
P8tdT3*6/
SOURCE DIR 0 1 0
5 4+(o6E<
!! !!TRACE PLOT========================= B zzC|
!!WINDOW Y Z VfX^iG r
!!PLOT FACETS 5 5 !!OVERLAY 4<y
TRACE!! PLOT ml nF,+s
!!$VIEW 3
jZMXEG)
>HP
`B2Q
H
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY s, HbW%s
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 95l)s],
PIXELS (256) u^"
I3u8$
SPREAD NORMAL Eu K}L[Kl
DISPLAY ~KBa-i%o
!! FORM 0.5 ;CYoc4e
PICTURE #De>EQ%
RETURN
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