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? .ojEKu+EJ'
以下是我的ASAP代码,可以拷贝运行一下。 U xBd14-R_
<mQXS87
SYSTEM NEW tsAV46S
RESET ?>Sv_0
T[Zs{S
UNITS MM &J)<1!|
WAVELENGTHS 3.7 UM .26mB
Xr
-T,?'J0 2
COATING PROPERTIES 9a=Ll]=\
1 0 'REFLECT' nd]SI;<
0 0 'ABSORB' aOH|[
l)9IgJ|<b
PARABASAL 4 M@R"-$Z
BEAMS COHERENT DIFFRACT j:h}ka/!p
WIDTHS 1.6 i'm<{v
"iA0hA
A=1 pR$(V4>
N=32 x"{aO6M
L=(N)*(A) !l9{R8m>eJ
D1=0.625E-3 m<h%BDSzr{
D2=(N)*(D1) SLKplLO
!! 微阶梯镜======================= xvV";o
$DO -16 15 1 )O]6dd
{SURFACE ]xQv\u
PLANE Z 0 RECTANGLE (A)/2 (L)/2 k
ucbI_
OBJECT 'MIRROR2_?' 3[ xdls
INTERFACE COATING REFLECT AIR AIR 1uAjy(y
SHIFT X (A)*?+(A)/2 0G+Q^]0
SHIFT Z (D2)*? U05;qKgkDF
} A`n>9|R
GROUP MIRROR2_? #7i*Diqf9
SHIFT Z (L) fOV_ >]u
ROTATE X -90 0 0 5dePpF D5
!! DETECTOR====================== <0})%V?-
SURFACE U?UU]>Q
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 M]s\F(*ib
OBJECT 'DETECTOR' Vh^y6U<
INTERFACE COATING ABSORB AIR AIR 1Cw]~jh
!! SOURCE ======================= e$Ksn_wEq
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) 4j#y?^s
SOURCE DIR 0 1 0 ZwkUd-=0i
!! !!TRACE PLOT========================= BpZ~6WtBq
!!WINDOW Y Z ?{ N,&d
!!PLOT FACETS 5 5 !!OVERLAY ./#YUIC
TRACE!! PLOT l~i?
!!$VIEW pey=zR!
AS7L
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY 7?*+,Fo#
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 ;7'O=%
PIXELS (256) 'z$$ZEz!C
SPREAD NORMAL *?FVLE
DISPLAY pF{jIXu
!! FORM 0.5 -G(me"Cu
PICTURE .9bi%=hP
RETURN