| 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？ Y}z?I%zL
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 7OHw/-j\
| ^!@
SYSTEM NEW "$YLU}S9
RESET HKw 4}FC*
Bq`kVfx
UNITS MM Jtk(yp{Zz
WAVELENGTHS 3.7 UM Lxrn# Z eM
JPKZU<:+V
COATING PROPERTIES &cE,9o%FZ
1 0 'REFLECT' IV*$U7~
0 0 'ABSORB' ' "
yl>"
Uwa1)Lwn
PARABASAL 4 POs~xaZ`H
BEAMS COHERENT DIFFRACT TnAX;+u
WIDTHS 1.6 8"^TWzg}L
qRLypm
A=1 f/m6q8!L{
N=32 `vBa. )u
L=(N)*(A) X.| 0E 87
D1=0.625E-3 brot&S2P><
D2=(N)*(D1) y$NG . .S
!! 微阶梯镜======================= 63$m& ]x
$DO -16 15 1 L <`g}iw
{SURFACE Dw,f~D$+ic
PLANE Z 0 RECTANGLE (A)/2 (L)/2 )CQ}LbX Zy
OBJECT 'MIRROR2_?' OO>2oH
INTERFACE COATING REFLECT AIR AIR
BT0hx!Ti
SHIFT X (A)*?+(A)/2 LXl ! !i%
SHIFT Z (D2)*? ;O>fy :$'
} &i RX-)^u
GROUP MIRROR2_? GrC")Z|3u
SHIFT Z (L) net9K X4\
ROTATE X -90 0 0 rfpxE>_|G
!! DETECTOR====================== `$- Ib^
SURFACE b*fflJ
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 LcF3P
4
OBJECT 'DETECTOR' OK(d&
INTERFACE COATING ABSORB AIR AIR ,iUx'U
!! SOURCE ======================= r g.if"o
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) xM \ApN~W
SOURCE DIR 0 1 0 L;`t%1
!! !!TRACE PLOT========================= cw{[B%vw
!!WINDOW Y Z { VO4""m
!!PLOT FACETS 5 5 !!OVERLAY qI@_
TRACE!! PLOT nrBitu,
!!$VIEW ?C3cPt"
ls Ch K
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY 5;Xrf=
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 =oJiNM5_u
PIXELS (256) 9_{!nQC.g
SPREAD NORMAL F eLP!oS>
DISPLAY L4b4X
!! FORM 0.5 Gy%e%'
PICTURE !) 34tu2
RETURN
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