| 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？ zB6&),[,v
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 vs*@)'n0 }
d81[hT}q
SYSTEM NEW tU-jtJ
RESET W)`H (J
pQ`S%]k.<
UNITS MM |W SvAM3
WAVELENGTHS 3.7 UM OuB [[L
]/Cu, mX
COATING PROPERTIES It G|{Bo
1 0 'REFLECT' <7j"C cJzZ
0 0 'ABSORB' ka:wD?>1i
#aadnbf
PARABASAL 4 Lnl-han%
BEAMS COHERENT DIFFRACT |YrvY1d!
WIDTHS 1.6 %vU *4mH
(2/ i1)Cq
A=1 :]`J cJ
N=32 QhPpo#^
L=(N)*(A) (y2P."
D1=0.625E-3 px^brzLQo
D2=(N)*(D1) -M-y*P)
!! 微阶梯镜======================= @SAJ*h fb0
$DO -16 15 1 z| zd=3c
{SURFACE n: JG+1I
PLANE Z 0 RECTANGLE (A)/2 (L)/2 >yr3C
OBJECT 'MIRROR2_?' N 0(($ 8G
INTERFACE COATING REFLECT AIR AIR ?xo<Fv
SHIFT X (A)*?+(A)/2 l
i2/"~l
SHIFT Z (D2)*? z_:r&UP`"
} S@C"tHD
GROUP MIRROR2_? _/F}y[B7d
SHIFT Z (L) R-\"^B V#Z
ROTATE X -90 0 0 P1"g62R
!! DETECTOR====================== w%kaM=
SURFACE ^I !gteU;
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 fXAD~7T*s
OBJECT 'DETECTOR' C,5Erb/
INTERFACE COATING ABSORB AIR AIR Cta!"=\
!! SOURCE ======================= C]
|m|`
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) 5K|s]Y;
SOURCE DIR 0 1 0 &fifOF#[ e
!! !!TRACE PLOT========================= s;:quM
!!WINDOW Y Z 6X$iTJ[\x
!!PLOT FACETS 5 5 !!OVERLAY eRIdN(pP
TRACE!! PLOT cONfHl{
!!$VIEW l78 :.
s9Bd mD^|#
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY /S%!{;:
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 2 $oGy
PIXELS (256) ]w9syz8X
SPREAD NORMAL Jv:|J
DZ'
DISPLAY q^b_'We_9
!! FORM 0.5 .t{?doOT
PICTURE Z/I`XPmk
RETURN
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