| 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？ Vz
@2_k
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 lC8Z@wkjO
4-vo R5Fd
SYSTEM NEW eg Xbe)ld
RESET hI>vz"J
Vl\8*!OL%
UNITS MM l.nd Wv
WAVELENGTHS 3.7 UM ;vuqI5k
W{W8 \
COATING PROPERTIES EJ@&vuDd$
1 0 'REFLECT' 0Fc^c[
0 0 'ABSORB' 9Rd & Jq^
0(|Yy/Yq
PARABASAL 4 <N'v-9=2jl
BEAMS COHERENT DIFFRACT '^!#* O
WIDTHS 1.6 ;Y9-0W
dtx3;d<NsJ
A=1 Nbvs_>N
N=32 "zZ Z h
L=(N)*(A) A~) #
D1=0.625E-3 m xEn iy
D2=(N)*(D1) -\[H>)z]RB
!! 微阶梯镜======================= )eD9H*mq
$DO -16 15 1 4^(aG7
{SURFACE Q5 xQ5Le
PLANE Z 0 RECTANGLE (A)/2 (L)/2 E*AI}:or;
OBJECT 'MIRROR2_?' i@m@]-2
INTERFACE COATING REFLECT AIR AIR E^4}l2m_
SHIFT X (A)*?+(A)/2 ORx6r=zg
SHIFT Z (D2)*? s
C>Oyh:%!
} cw"Ou%
GROUP MIRROR2_? \)`OEGdOR\
SHIFT Z (L) urhOvC$a
ROTATE X -90 0 0 = n<Lbl(7
!! DETECTOR====================== #1De#u Z
SURFACE Q].p/-[(
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 H! P$p-*.
OBJECT 'DETECTOR' o]M1$)>b +
INTERFACE COATING ABSORB AIR AIR ). 3riR
!! SOURCE ======================= %zz,qs)Eu
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) 2!Qg1h M
SOURCE DIR 0 1 0 6 o
d ^+>U
!! !!TRACE PLOT========================= ("KtJ
!!WINDOW Y Z <&RpGAk%I
!!PLOT FACETS 5 5 !!OVERLAY ")YD~ZA%)
TRACE!! PLOT Ji4 JP0
!!$VIEW 9 2x)Pc^D
%#x
l +^
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY J'C9} 7G
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 VVJI J9L&C
PIXELS (256) Vbv)C3ezD
SPREAD NORMAL HA74s':FN
DISPLAY %<0 'xJ%%Q
!! FORM 0.5 N 9W,p 2
PICTURE oy-y Q Y X
RETURN
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