| 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？ BZ+-p 5]-
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 ySN V^+
`QP
~
SYSTEM NEW )+O r
RESET 9 |:^k.
^ Ip3A
UNITS MM 3-wD^4)O,
WAVELENGTHS 3.7 UM q@#BPu"\l
F#q&(
COATING PROPERTIES f5dR 5G
1 0 'REFLECT' =LH}YUmd
0 0 'ABSORB' j=sBq.S
89eq[ |G_
PARABASAL 4 (7q^FtjA#
BEAMS COHERENT DIFFRACT Q2'eQ0W{ o
WIDTHS 1.6 n TnRGf\T
j64 4V|z
A=1 M?:\9DDd
N=32 w^VSj%XH!
L=(N)*(A) #+sF`qR,
D1=0.625E-3 b 6W#SpCF
D2=(N)*(D1) X .J
!! 微阶梯镜======================= B%b_/F]e
$DO -16 15 1 B \<ydN
{SURFACE $ AwZ2HY
PLANE Z 0 RECTANGLE (A)/2 (L)/2 U}P,EP%p
OBJECT 'MIRROR2_?' IKm&xzV-
INTERFACE COATING REFLECT AIR AIR Yw"P)Zp
SHIFT X (A)*?+(A)/2 ckwF|:e 7*
SHIFT Z (D2)*? @W9H9 PWv&
} D9,!
%7 i
GROUP MIRROR2_? 5Hle-FDn9
SHIFT Z (L) V<0$xV1b|=
ROTATE X -90 0 0 (Pz 8 iz
!! DETECTOR====================== 9/;{>RL=
SURFACE 8W{~wg`
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 syFI$r f
_
OBJECT 'DETECTOR' u9>6|w+
INTERFACE COATING ABSORB AIR AIR @&:VKpu\
!! SOURCE ======================= R~c1)[[E
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) (5(fd.m+_
SOURCE DIR 0 1 0 C={mi#G[/
!! !!TRACE PLOT========================= B! `\L!
!!WINDOW Y Z <JH9StGGc?
!!PLOT FACETS 5 5 !!OVERLAY `@\^m_!}
TRACE!! PLOT AQn[*
!!$VIEW '^1o/C
? Q:PPqQ
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY ( (9 YG
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 51/sTx<Z}
PIXELS (256) ?z"YC&Tp
SPREAD NORMAL *. dKR
DISPLAY r /yHmEk&
!! FORM 0.5 `r.N
PICTURE |KaR
n;BM
RETURN
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