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？ Hfo<EB2Y9N
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 hJk:&!M=T
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SYSTEM NEW xpwy% uo
RESET eT(X Ri0
V U5</si+
UNITS MM J}#2Wy^{
WAVELENGTHS 3.7 UM Iij$ce`nx
@ qx$b~%
COATING PROPERTIES =]pEvj9o
1 0 'REFLECT' &o1k_! 25
0 0 'ABSORB' d'3"A"9R7-
y+{)4ptg$<
PARABASAL 4 e+VE FWz
BEAMS COHERENT DIFFRACT p1 HbD`ST
WIDTHS 1.6 8$ #z>
=#<bB) 59
A=1 gm!sLZ!X
N=32 se=^K#o
L=(N)*(A) u$(ei2f
D1=0.625E-3 UTN[! 0[
D2=(N)*(D1) b7T;6\[m
!! 微阶梯镜======================= gOah5*Lj
$DO -16 15 1 " * W# z
{SURFACE owVks-/
PLANE Z 0 RECTANGLE (A)/2 (L)/2 ]f U&?z#
OBJECT 'MIRROR2_?' N`N?1!fM<}
INTERFACE COATING REFLECT AIR AIR 3#>%_@<
SHIFT X (A)*?+(A)/2 DxpJP,wY3
SHIFT Z (D2)*? PDCb(5
} |k%1mE(+=s
GROUP MIRROR2_? b0@K ~O;g
SHIFT Z (L) uZ>q$
F
ROTATE X -90 0 0 gMkSl8[
!! DETECTOR====================== Hr!$mf) h
SURFACE u7Ix7`V
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 "Ehh9 m1&
OBJECT 'DETECTOR' ?d{O' &|:
INTERFACE COATING ABSORB AIR AIR nLv~)IQ}:
!! SOURCE ======================= u=vBjaN2_w
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) #e,TS`"eD
SOURCE DIR 0 1 0 8ZM#.yB B
!! !!TRACE PLOT========================= 7n+,!oJ
!!WINDOW Y Z 6iF&!Fd>J
!!PLOT FACETS 5 5 !!OVERLAY |>m'szca4
TRACE!! PLOT
Q6e7Z-8
!!$VIEW 6-J}ZfGj
RO%M9LISI
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY i1m>|[@k
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 dG]B-(WTC
PIXELS (256) 9PV+Kr!c5I
SPREAD NORMAL EBz4k)@ m
DISPLAY iXL^[/}&?M
!! FORM 0.5 g; nLR<]
PICTURE eMmNQRmH
RETURN
