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？ \$sjrqKnu
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 #bX9Tu0
8NBT|N~N
SYSTEM NEW CVNj- &vj
RESET S35~Cp
T 2 0& F
UNITS MM 4_A0rveP
WAVELENGTHS 3.7 UM XI<L;
lVOu)q@l7g
COATING PROPERTIES R :X0'zeRr
1 0 'REFLECT' f>`dF?^6
0 0 'ABSORB' >-8cU_m7s
aJ Z"D8C
PARABASAL 4 #>lG7Ns|4
BEAMS COHERENT DIFFRACT rf~Y6U?7
WIDTHS 1.6 u .f= te
oVFnl A
A=1 Q7 Iw[=;\
N=32 7lV.[&aKW
L=(N)*(A) I$q]. B
D1=0.625E-3 wX >*H
D2=(N)*(D1) I9h ?;(
!! 微阶梯镜======================= 'R-3fO???
$DO -16 15 1 @+3kb.P%7
{SURFACE KlRr8 G!Z
PLANE Z 0 RECTANGLE (A)/2 (L)/2 *g?Po+ef%
OBJECT 'MIRROR2_?' wE+${B03
INTERFACE COATING REFLECT AIR AIR X+UJzR90
SHIFT X (A)*?+(A)/2 (hiyNMC
SHIFT Z (D2)*? IxLhU45
} 8NyJc"T<.
GROUP MIRROR2_? }PTV] q%
SHIFT Z (L) V"c
6Kdtd
ROTATE X -90 0 0 ]vwW]O7
!! DETECTOR====================== R2Zgx\VV'
SURFACE dXF^(y]l
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 7}M2bH} \K
OBJECT 'DETECTOR' /|*
Y2ETOr
INTERFACE COATING ABSORB AIR AIR lXcx@#~
!! SOURCE ======================= wF((
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) [w%
qV 6
SOURCE DIR 0 1 0 xJ#d1[kzo
!! !!TRACE PLOT========================= UQ{L{H
!!WINDOW Y Z *98$dQR$
!!PLOT FACETS 5 5 !!OVERLAY ^0/j0]O
TRACE!! PLOT nBk)WX&[K
!!$VIEW (sh)TBb5
0PlO(" ,a
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY |PC*=ykT3
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 8F._9U-EN
PIXELS (256) o!)3 ?
SPREAD NORMAL :j + ZI3@
DISPLAY O)[1x4U
!! FORM 0.5 dq] 0 X?[6
PICTURE gLOEh6
RETURN
