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? +s,=lL
以下是我的ASAP代码,可以拷贝运行一下。 'j8:vq^d
w7.V6S$Ga
SYSTEM NEW VGy<")8D/
RESET '6iEMg&3
9iIhte.
UNITS MM m<T%Rb4?@
WAVELENGTHS 3.7 UM %op**@4/t\
1y@i}<9F
COATING PROPERTIES ,i?nWlh+
1 0 'REFLECT' {Qf=G|Ah
0 0 'ABSORB' <s31W3<v
wtQ++l%{G
PARABASAL 4 wj$<t'MN
BEAMS COHERENT DIFFRACT `_Zg3_K.dS
WIDTHS 1.6 36&e.3/#
J9--tJ?[>o
A=1 ;s = l52
N=32 T\6dm/5
L=(N)*(A) |/|5UiX7
D1=0.625E-3 5,lEx1{_
D2=(N)*(D1) WtsFz*`)y
!! 微阶梯镜======================= g#pr yYz
$DO -16 15 1 T9E+\D
{SURFACE (?1y4M
PLANE Z 0 RECTANGLE (A)/2 (L)/2 %ufN8w!p
OBJECT 'MIRROR2_?' -e"H ^:
INTERFACE COATING REFLECT AIR AIR wtLO!=B
SHIFT X (A)*?+(A)/2 Gi|w}j_
SHIFT Z (D2)*? y4
#>X
} @|Cz-J;D
GROUP MIRROR2_? >W=,j)MA
SHIFT Z (L) 64
wv<r]5j
ROTATE X -90 0 0 ,B*EVN
!! DETECTOR====================== +5g_KS
SURFACE oz\!V*CtK
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 q5J5>
OBJECT 'DETECTOR' ,a{P4Bq
INTERFACE COATING ABSORB AIR AIR Y#ap*
!! SOURCE ======================= L~(j3D*
3
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) %OL$57Ia
SOURCE DIR 0 1 0 /e5O"@
!! !!TRACE PLOT========================= 5 Aw"B
!!WINDOW Y Z 58}U^IW
!!PLOT FACETS 5 5 !!OVERLAY :;%2BSgFU
TRACE!! PLOT p}}R-D&K
!!$VIEW )W,aN)1)
n K1Slg#U
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY D=A&+6B@-
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 V@.Ior}w
PIXELS (256) zH 72'"w
SPREAD NORMAL 7y'RFD9@{
DISPLAY l5Ui w2
!! FORM 0.5 (U DnsF
PICTURE H5/6TX72N
RETURN