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? bT*MJ7VVm
以下是我的ASAP代码,可以拷贝运行一下。 .t4IR
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SYSTEM NEW @$gvV]dA
RESET *Eu
ca~%=
bQow,vf
UNITS MM &4sUi K"
WAVELENGTHS 3.7 UM `UMv#-Y8
(EIdw\
COATING PROPERTIES kWc%u-_
1 0 'REFLECT' %+ig7a:
0 0 'ABSORB' @a)@1:=Rm
wy<m&M<Gr
PARABASAL 4 AtYe\_9$C
BEAMS COHERENT DIFFRACT ,Ww)>O+
WIDTHS 1.6 /_l%Dm?
n>)CCf@H
A=1 *qj @y'1\
N=32 Y2!OJuyGc
L=(N)*(A) N?U;G*G
D1=0.625E-3 ^E8&!s
D2=(N)*(D1) /$'tO3
!! 微阶梯镜======================= I1BVqIt1i
$DO -16 15 1 ez&v"J
{SURFACE |8c3%jve
PLANE Z 0 RECTANGLE (A)/2 (L)/2
vr/V_
OBJECT 'MIRROR2_?' VZ'[\3J
INTERFACE COATING REFLECT AIR AIR YwQxN"
SHIFT X (A)*?+(A)/2 GN?^7kI
SHIFT Z (D2)*? }RYr)
} t@QaxZIlt;
GROUP MIRROR2_? T|Sz~nO}f
SHIFT Z (L) b/5?)!I
ROTATE X -90 0 0 Mi,yg=V
!! DETECTOR====================== ]C3{ _?=
SURFACE Oj\lg2Ck
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 q|b#=Af]g
OBJECT 'DETECTOR' QUVwO
m
INTERFACE COATING ABSORB AIR AIR c^><^LGb
!! SOURCE ======================= M9HM:
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) ^](sCE7
SOURCE DIR 0 1 0 /jaTH_Q),:
!! !!TRACE PLOT========================= G)]'>m<y
!!WINDOW Y Z f)l:^/WP+
!!PLOT FACETS 5 5 !!OVERLAY t,M_
TRACE!! PLOT x5YW6R.<t
!!$VIEW d
}=fJ
__teh>MC
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY O
$'#8
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 XxcY
PIXELS (256) iagl^(s
SPREAD NORMAL %%)"W
n#`
DISPLAY ~ P"@^cq
!! FORM 0.5 f5"1WtB
PICTURE ?OW
4J0B'
RETURN