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? *52*IRH
以下是我的ASAP代码,可以拷贝运行一下。 Rd;k> e
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SYSTEM NEW PygT_-3z{
RESET oD_je~b)
7X.rGJZq
UNITS MM z
%` \p
WAVELENGTHS 3.7 UM pt;E~_
sM({u/
COATING PROPERTIES =,KRZqz
1 0 'REFLECT' |c,":R
0 0 'ABSORB' Q,Vv
+T=Z!2L
PARABASAL 4 zcD&xoL\H
BEAMS COHERENT DIFFRACT 8Wid.o-U
WIDTHS 1.6 -,Cx|Nl
bCg
{z b#
A=1 c|u{(E58
N=32 B;[{7J]
L=(N)*(A) y%k\=:m
D1=0.625E-3 )I{41/_YA
D2=(N)*(D1) |\2zw _o
!! 微阶梯镜======================= 7+JQaYO`"
$DO -16 15 1 Jt"0|+g|
{SURFACE _)Q)tOW
PLANE Z 0 RECTANGLE (A)/2 (L)/2 O^|dc=
OBJECT 'MIRROR2_?' U .hV1
INTERFACE COATING REFLECT AIR AIR }N(-e$88
SHIFT X (A)*?+(A)/2 jNB|98NN
SHIFT Z (D2)*? R_\{a*lV0
} ZO{uG(u
GROUP MIRROR2_? BKfcK>%g
SHIFT Z (L) Bp6jF2
ROTATE X -90 0 0 jDIO,XuF
!! DETECTOR====================== K>6#MI
SURFACE 1Vt7[L*
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 b gGd
OBJECT 'DETECTOR' q$e2x=?
INTERFACE COATING ABSORB AIR AIR ,x!P|\w.G{
!! SOURCE ======================= (Mhj-0xf$
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) .2/(G{}U
SOURCE DIR 0 1 0 z+FhWze
!! !!TRACE PLOT========================= S*Scf~Qp
!!WINDOW Y Z jFpXTy[>
!!PLOT FACETS 5 5 !!OVERLAY T j9;".
TRACE!! PLOT AJ[g~s't
!!$VIEW +[8s9{1{C
zg2A$Fd[j
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY lZZ4 O(
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 P!:Y<p{=>
PIXELS (256) GM|gm-t<@
SPREAD NORMAL |Y|{9Osus
DISPLAY RS!~5nk5
!! FORM 0.5 G*uy@s:
PICTURE :XEr{X
RETURN