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? sjwD x0(7=
以下是我的ASAP代码,可以拷贝运行一下。 YY
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SYSTEM NEW _#TbOfu
RESET a,KqTQB
{[[/*1r|
UNITS MM &v<Am%!N
WAVELENGTHS 3.7 UM E<L6/rG
YB"=eld
COATING PROPERTIES OQh4MN#$
1 0 'REFLECT' T:!Re*=JJ
0 0 'ABSORB' ljJR7<
kr>F=|R]
PARABASAL 4 </9@RO
BEAMS COHERENT DIFFRACT =x}p>#o,J
WIDTHS 1.6 4pZ=CB+j
e6uVUzP4
A=1 Z,5B(X j
N=32 ==Bxv:6
L=(N)*(A)
|RZI]H%
D1=0.625E-3 Pze{5!
D2=(N)*(D1) xaW9Sj0ZM
!! 微阶梯镜======================= e~NF}9#A
$DO -16 15 1 \Ea(f**2B
{SURFACE 5FwVR3,
PLANE Z 0 RECTANGLE (A)/2 (L)/2 TqTz
OBJECT 'MIRROR2_?' i=X
B0-
INTERFACE COATING REFLECT AIR AIR
A!^gF~ 5
SHIFT X (A)*?+(A)/2 s.XLC43Rs
SHIFT Z (D2)*? @]X5g8h
} +~eybm;
GROUP MIRROR2_? 29r (Y
SHIFT Z (L) (5Sv$Xt
ROTATE X -90 0 0 V25u_R`{
!! DETECTOR====================== o1)8?h
SURFACE AIw< 5lW
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 =SLCG.
OBJECT 'DETECTOR' "D?:8!\!
INTERFACE COATING ABSORB AIR AIR K#4Toc#=V
!! SOURCE ======================= Kzrt%DA
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) v `7` '
SOURCE DIR 0 1 0 *{s
3.=P.
!! !!TRACE PLOT========================= DE" Y(;S
!!WINDOW Y Z ]]8^j='P'
!!PLOT FACETS 5 5 !!OVERLAY 2~RG\JWTA
TRACE!! PLOT sH /08Z
!!$VIEW -9~WtTaV.H
|}naI_Qudv
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY CCU<t
Q
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 tLo_lLn*~%
PIXELS (256) &AhkP=Yw
SPREAD NORMAL Tb<}GcwJ
DISPLAY %3mh'Z -[f
!! FORM 0.5 B):hm
PICTURE d.t$VRO
RETURN