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? Nvef+L,v
以下是我的ASAP代码,可以拷贝运行一下。 4Pm+0=E
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SYSTEM NEW /p&)bL
RESET CYxrKW
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1V@\L|Y
UNITS MM Ul EP;
WAVELENGTHS 3.7 UM 4-YXXi}
VB?mr13}G
COATING PROPERTIES limzDQ^
1 0 'REFLECT' h/CF^0m"!
0 0 'ABSORB' I8<s4q
W1@Q)i
PARABASAL 4 #=MQE
BEAMS COHERENT DIFFRACT `Al[gG?/!
WIDTHS 1.6 0H V-e
/&+6nOP
A=1 rLzYkZ
N=32 u D.E>.B
L=(N)*(A) })l+-H"
D1=0.625E-3 ,yC-QFQE
D2=(N)*(D1) z~g7O4#
!! 微阶梯镜======================= LX
%8a^?;
$DO -16 15 1 jaoGm$o>"F
{SURFACE GC3:ZpV`
PLANE Z 0 RECTANGLE (A)/2 (L)/2 Oc]&1>M
OBJECT 'MIRROR2_?' Q&rf&8iH
INTERFACE COATING REFLECT AIR AIR !6wbg
SHIFT X (A)*?+(A)/2 biFN]D
SHIFT Z (D2)*? F7(~v2|
} }}GBCXAf_
GROUP MIRROR2_? Xcq9*!%o
SHIFT Z (L) ]c8$%
ROTATE X -90 0 0 jH*+\:UP-
!! DETECTOR====================== JuGQS24
SURFACE r|Y|uv0
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 EO|r
OBJECT 'DETECTOR' !d1}IU-h
INTERFACE COATING ABSORB AIR AIR r: _-Cj
!! SOURCE ======================= N_vVEIO9
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) |wf:|%
SOURCE DIR 0 1 0 u1 uu_*
!! !!TRACE PLOT========================= X7sWu{n
!!WINDOW Y Z 'DQp
!!PLOT FACETS 5 5 !!OVERLAY YkcX#>,
TRACE!! PLOT ,EgIH%*g
!!$VIEW
,i2%FW
5L<}u`0J
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY K/~+bq#+
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 .P=uR8
PIXELS (256) JlsRP
SPREAD NORMAL *JG?^G"l
DISPLAY S.+)">buH
!! FORM 0.5 i3.8m=>
PICTURE 5 TD"
RETURN