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？ 90 [6PSXk
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 &pzf*|}
n muzTFs=
SYSTEM NEW ,`
64t'g
RESET 5(=5GkE)>
NHL9qL"qk
UNITS MM Ls` [7w
WAVELENGTHS 3.7 UM ZQk!Ia7
CBr(a'3{Z
COATING PROPERTIES ak A7))Q
1 0 'REFLECT' OU
esL9
0 0 'ABSORB' H[_i=X3-~
jP{&U&!i
PARABASAL 4 F1)5"7f
BEAMS COHERENT DIFFRACT ;l %$-/%
WIDTHS 1.6 ;aN_!!
r
dfP4SJqq
A=1 nSv@F T'~z
N=32 =%ok:+D]
L=(N)*(A) |z7V1xF
D1=0.625E-3 uc>":V
D2=(N)*(D1) Vak\N)=u
!! 微阶梯镜======================= \(A A|;
$DO -16 15 1 @V&c=8) 8
{SURFACE 8c\\-{
PLANE Z 0 RECTANGLE (A)/2 (L)/2 F )Iz:
OBJECT 'MIRROR2_?' 9Vru,7g
INTERFACE COATING REFLECT AIR AIR o (k{Ed
SHIFT X (A)*?+(A)/2 45?% D}
SHIFT Z (D2)*? ,v%' 2[}
} ]9N&I/-
GROUP MIRROR2_? jF}-dfe
SHIFT Z (L) E<l/o5<nC
ROTATE X -90 0 0 iInWw"VbKe
!! DETECTOR====================== F8S>L d
SURFACE Z)}UCi+/".
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 N; '] & f
OBJECT 'DETECTOR' p|C[T]J\@
INTERFACE COATING ABSORB AIR AIR ?I[*{}@n"
!! SOURCE ======================= >UQY3C
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) M!46^q~-
SOURCE DIR 0 1 0 N=PSr 4
!! !!TRACE PLOT========================= i! x>) E
!!WINDOW Y Z kH5D%`Kw
!!PLOT FACETS 5 5 !!OVERLAY g#MLA5%=u
TRACE!! PLOT u"uL,w
1-
!!$VIEW 35Yf,@VO
j4<K0-?
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY D4b-Y[/"
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 &7i&"TNptP
PIXELS (256) Z5E; FGPb
SPREAD NORMAL 8t3m$<7
DISPLAY |AH>EXhv
!! FORM 0.5 g ) 5mr:\
PICTURE n)~*BpL3
RETURN
