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? f9A^0A?c
以下是我的ASAP代码,可以拷贝运行一下。 :JBvCyj4PE
E^uWlUb{
SYSTEM NEW Ood8Qty(
RESET F$l]#G.@A
>heFdKq1
UNITS MM %kM|Hk3d
WAVELENGTHS 3.7 UM N1dp%b9W(
C_>dJYM
COATING PROPERTIES +b<q4W
1 0 'REFLECT' xHs8']*\
0 0 'ABSORB' ^a=,,6T
vA(V.s`
PARABASAL 4 &&Sl0(6x[T
BEAMS COHERENT DIFFRACT SDY!! .
WIDTHS 1.6 ~-r*2bR
m2!y;)F0
A=1
'g<0MOq{
N=32 obUX7N
L=(N)*(A) qla$}dnvc
D1=0.625E-3 d|UK=B^x
D2=(N)*(D1) D8u_Z<6IjI
!! 微阶梯镜======================= F<'@T,LVc
$DO -16 15 1 0~qnwe[g}
{SURFACE 39s%CcI`k
PLANE Z 0 RECTANGLE (A)/2 (L)/2 gAcXd<a0
OBJECT 'MIRROR2_?' N%1T>cp0
INTERFACE COATING REFLECT AIR AIR ~HbZRDcJc
SHIFT X (A)*?+(A)/2 AL #w
SHIFT Z (D2)*? 8$SA"c)
} P4vW.|@
GROUP MIRROR2_? 0QE2e'}}-
SHIFT Z (L) -5 -X[`cF
ROTATE X -90 0 0 <mE)&7C
!! DETECTOR====================== $_N<! h*\
SURFACE aBX^Wd
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 YG<7Zv
OBJECT 'DETECTOR' i#$N,kt
INTERFACE COATING ABSORB AIR AIR n !ty\E
!! SOURCE ======================= GT|=Kx$;
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) F<wwuCbF
SOURCE DIR 0 1 0 vh8{*9+
!! !!TRACE PLOT========================= RIXUzKLO
!!WINDOW Y Z KsZXdM/
!!PLOT FACETS 5 5 !!OVERLAY Jj:4l~b,w
TRACE!! PLOT Og8:
!!$VIEW !(=bH"P
!o.l:Mr
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY psb$rbu7[
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 ]d]tQPEU
PIXELS (256) C^]y
iR-U
SPREAD NORMAL `>^2MHF3LT
DISPLAY Q`#Y_N-h+
!! FORM 0.5 LD]>_P83
PICTURE (;^VdiJ
RETURN