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? *I/A,#4r
以下是我的ASAP代码,可以拷贝运行一下。 ex0oAt^
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SYSTEM NEW ' 3VqkQ4
RESET ;%!tf{Si
LV\ieM
UNITS MM <vLdBfw&N
WAVELENGTHS 3.7 UM d/4ubf+$k
jQs*(=ls
COATING PROPERTIES sSy$(%
1 0 'REFLECT' j`hNZ %a
0 0 'ABSORB' #AvEH=:
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PARABASAL 4 <L2GUX36#
BEAMS COHERENT DIFFRACT 5Abz5-^KH
WIDTHS 1.6 *@~`d*d
p4y6R4kyT
A=1 sU0Stg8&b
N=32 {9Xm<}%u]]
L=(N)*(A) i<Q&
D\Pv
D1=0.625E-3 1oB$u!6P
D2=(N)*(D1) *F|i&2
!! 微阶梯镜======================= C|9[Al
$DO -16 15 1 KZZOi:
{SURFACE pqOA/^ar
PLANE Z 0 RECTANGLE (A)/2 (L)/2 J+0/ :00(
OBJECT 'MIRROR2_?' EZ*t$3.T
INTERFACE COATING REFLECT AIR AIR ~R'BU=!;F
SHIFT X (A)*?+(A)/2 C~{xL>I
SHIFT Z (D2)*? G~`'E&/
} .@Hmg
GROUP MIRROR2_? '%);%y@v
SHIFT Z (L) prqT (1
ROTATE X -90 0 0 89db5Dx
!! DETECTOR====================== )G^p1o;\
SURFACE <3)|44.o&
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 Lp!0H `L
OBJECT 'DETECTOR' (y 3~[
INTERFACE COATING ABSORB AIR AIR ,YQ=Zk)w
!! SOURCE ======================= 9}.,2JE
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) /G{&[X<4U
SOURCE DIR 0 1 0 219R&[cb
!! !!TRACE PLOT========================= h)7v1,;w'
!!WINDOW Y Z sC!1B6:
!!PLOT FACETS 5 5 !!OVERLAY F9F" F
TRACE!! PLOT /i> ?i@O-
!!$VIEW "OVi /:*B
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CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY @Jkui
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 GA(OK-WUd
PIXELS (256) ,n^TN{#
SPREAD NORMAL eSJAPU(D
DISPLAY #dHr&1(
!! FORM 0.5 =.VepX|?D
PICTURE >c}:
RETURN