| 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？ M \rW
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 HM ;9%rtO
Ad DlS~\?
SYSTEM NEW F1%-IBe
RESET Q[ J%
oH H-joYnn
UNITS MM $lmGMljF
WAVELENGTHS 3.7 UM xG i,\K\:
fOs} 5J
COATING PROPERTIES o_hk!s^4m
1 0 'REFLECT' T7_i: HU%
0 0 'ABSORB' /pni_-l*
X8aNl" x
PARABASAL 4 F @
lJk|*_
BEAMS COHERENT DIFFRACT [ h20y
WIDTHS 1.6 1 i #
.h$
~ {OBRC
A=1 FY h+G-Y#
N=32 mb_*FJB-_
L=(N)*(A) BMMWP
D1=0.625E-3 g Oa L4tu
D2=(N)*(D1) fH[Yc>(oj
!! 微阶梯镜======================= 60?/Z2w5
$DO -16 15 1 1,q&A
RTS
{SURFACE uaN0X"
PLANE Z 0 RECTANGLE (A)/2 (L)/2 H|& [,&M>
OBJECT 'MIRROR2_?' CqGi
2<2
INTERFACE COATING REFLECT AIR AIR |E)-9JSRy
SHIFT X (A)*?+(A)/2 AdV&w: ^yf
SHIFT Z (D2)*? Fy_D[g
} uh#"4-v
GROUP MIRROR2_? H]2c w{2
SHIFT Z (L) q))r lMo
ROTATE X -90 0 0 C{7
j<O
!! DETECTOR====================== .=rS,Tpo
SURFACE $< &N#
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 uEqL Dg
OBJECT 'DETECTOR' AP*Z0OFE
INTERFACE COATING ABSORB AIR AIR \ !D <u'n
!! SOURCE ======================= ght vAG
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) Bg.~#H
SOURCE DIR 0 1 0 <49Gsm &0
!! !!TRACE PLOT========================= .URCu B\{
!!WINDOW Y Z xx[XwN;
!!PLOT FACETS 5 5 !!OVERLAY ~wtl\-cY
TRACE!! PLOT Se*o{V3s$
!!$VIEW rt- ^?2c?
);-?~
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY #w_cos [I
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 j?a^fcXB
PIXELS (256) 4O}ZnE1[
SPREAD NORMAL ;A^Ii>`
DISPLAY l0hcNEj{W
!! FORM 0.5 XNODDH
PICTURE Z{<& 2*
RETURN
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