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? T2bnzIi
以下是我的ASAP代码,可以拷贝运行一下。 k)E ;(
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SYSTEM NEW <q7s`,rG
RESET XUsy.l/
9YSVK\2$
UNITS MM umDtp\
WAVELENGTHS 3.7 UM Js}tZ\+P75
-,>:DUN2
COATING PROPERTIES |t\KsW
1 0 'REFLECT' ?;8M^a/
0 0 'ABSORB' `?SG XXC
u~71l)LA
PARABASAL 4 md6*c./Z
BEAMS COHERENT DIFFRACT y<r44a_!
WIDTHS 1.6 v_-ls"l
-fM1$/]
A=1 Za\RM[Z!I
N=32 hZ#\t
L=(N)*(A) GUCM4jVT^
D1=0.625E-3 nx :)k-p_[
D2=(N)*(D1) R+^z y"~
!! 微阶梯镜=======================
-HT L5
$DO -16 15 1 -q(:%;
{SURFACE luF#OP C
PLANE Z 0 RECTANGLE (A)/2 (L)/2 s<{GpWT8
OBJECT 'MIRROR2_?' gY\mXM*^
INTERFACE COATING REFLECT AIR AIR &V;x 4
SHIFT X (A)*?+(A)/2 A}eOR=E
SHIFT Z (D2)*? >PH< N
} nE<J`Wo$f
GROUP MIRROR2_? Y?.gfEXSQo
SHIFT Z (L) 1OPfRDn.bk
ROTATE X -90 0 0 4H7Oh*P\j
!! DETECTOR====================== LO>8 j:
SURFACE Et0&E
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 q+J0}y{#8)
OBJECT 'DETECTOR' ' WnpwY
INTERFACE COATING ABSORB AIR AIR *C/KM;&
!! SOURCE ======================= f}-v
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) tAt;bYjb\
SOURCE DIR 0 1 0 %f#\i#G<k
!! !!TRACE PLOT========================= jhcuK:`L
!!WINDOW Y Z |bvGYsn_#=
!!PLOT FACETS 5 5 !!OVERLAY %((cFQ9
TRACE!! PLOT )Jz !Ut
!!$VIEW cB36p&%
'7=<#Blc
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY ?7 X3P
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 I,z"_[^G
PIXELS (256) }amE6
SPREAD NORMAL dff#{
DISPLAY 'T{pdEn8u
!! FORM 0.5 JSUzEAKe
PICTURE tQCj)Ms 'X
RETURN