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? FWB
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以下是我的ASAP代码,可以拷贝运行一下。 UlWm).
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diNAT`|?#
SYSTEM NEW Z4X, D`s
RESET GKbbwT0T|
fLpWTkr0
UNITS MM h56Kmxxk
WAVELENGTHS 3.7 UM kS35X)-
s3T7M:DM4
COATING PROPERTIES sq;!5qK
1 0 'REFLECT' eIEL';N6
0 0 'ABSORB' p>O/H1US;
o*artMkG
PARABASAL 4 )"?eug}D
BEAMS COHERENT DIFFRACT @`#x:p:
WIDTHS 1.6 :
h(Z\D_
Yg?BcY\
A=1 Yo1]HG(kXB
N=32 pH2/."zE<
L=(N)*(A) \4LTViY]
D1=0.625E-3 Q lA?dXQ
D2=(N)*(D1) QFnpp\K
!! 微阶梯镜======================= S8B?uU
$DO -16 15 1 5]GgjQ
{SURFACE /\_n5XI1
PLANE Z 0 RECTANGLE (A)/2 (L)/2 kxN
O9w
OBJECT 'MIRROR2_?' eM
5#L,Y{
INTERFACE COATING REFLECT AIR AIR ZW9OPwV
SHIFT X (A)*?+(A)/2 ?:M4GY"gV
SHIFT Z (D2)*? AAs&P+;
} |AacV
GROUP MIRROR2_? p!~1~q6
SHIFT Z (L) @e&0Wk
ROTATE X -90 0 0 0)cSm"s
!! DETECTOR====================== 8MI8~
SURFACE liG|#ny{
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 [=BMvP5
OBJECT 'DETECTOR' Bu&9J(J1
INTERFACE COATING ABSORB AIR AIR z;dRzwL
!! SOURCE ======================= 6bc\
)n`
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) ;BqCjS%`N
SOURCE DIR 0 1 0 jVLJqWP'!
!! !!TRACE PLOT========================= %$kd`Rl}
!!WINDOW Y Z k0O5c[j
!!PLOT FACETS 5 5 !!OVERLAY dWQB1Y*N
TRACE!! PLOT y.I&x#(^
!!$VIEW *Ti"8^`6
|IV7g*J89
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY ^iBIp#
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 122s7A
PIXELS (256) 4Ngp -
SPREAD NORMAL c|`$
h
DISPLAY Zhv%mUj~
!! FORM 0.5 m(?{#aaq
PICTURE "&/2@
RETURN