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？ TP&&' 4?D1
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 O_ /|Wx
cu$i8$?t
SYSTEM NEW e` D? x1-
RESET 9q
f= P3
LuW^Ga"E
UNITS MM 1q;r 4$n
WAVELENGTHS 3.7 UM B#;0 {
~ 'L`RJR
COATING PROPERTIES / "OJ~e_%
1 0 'REFLECT' DFFB:<
0 0 'ABSORB' h O}nc$S
_a~-B@2g
PARABASAL 4 (dVrGa54
BEAMS COHERENT DIFFRACT &26H
WIDTHS 1.6 \mp5G&+/Q
1*J#:|({(
A=1 gdfG3d$4
N=32 y1 5 3ax
L=(N)*(A) i7(\i2_P
D1=0.625E-3 Ks-aJ+}
D2=(N)*(D1)
)!(etB=`y
!! 微阶梯镜======================= Q.Ljz
Z
$DO -16 15 1 `T;Y%"X!
{SURFACE 8cyC\Rs
PLANE Z 0 RECTANGLE (A)/2 (L)/2 o|0QstS Cl
OBJECT 'MIRROR2_?' K~JXP5`(
INTERFACE COATING REFLECT AIR AIR N`%f+eT(
SHIFT X (A)*?+(A)/2 0al8%z9e@
SHIFT Z (D2)*? [v$NxmRu
} +4 %: q~C
GROUP MIRROR2_? Jf=$h20x
SHIFT Z (L) }8cX0mZ1j
ROTATE X -90 0 0 Po fHe
!! DETECTOR====================== .JkF{&=B
SURFACE +O,h<* y
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 % [ C-KQH
OBJECT 'DETECTOR' "G`8>1tO_
INTERFACE COATING ABSORB AIR AIR +B0G[k7
!! SOURCE ======================= ! HP/`R
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) {<3 >^ o|"
SOURCE DIR 0 1 0 Y2,\ WKa
!! !!TRACE PLOT========================= +w
pe<T
!!WINDOW Y Z kbkq.fYr
!!PLOT FACETS 5 5 !!OVERLAY B =`"!?we
TRACE!! PLOT %d\|a~p:
!!$VIEW gwepaW
d4 #Ra%
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY -'OO6mU
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 `i)&nW)R
PIXELS (256) .5~ W3 v
<
SPREAD NORMAL axW4 cS ?
DISPLAY Q5 s?/r
!! FORM 0.5 YQ+Kl[ ec
PICTURE HBFuA.",
RETURN
