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? 1k
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以下是我的ASAP代码,可以拷贝运行一下。 V{j>09u
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SYSTEM NEW $\
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RESET >K2Md*[P3q
^}gQh#
UNITS MM ?{OB+f}Mo
WAVELENGTHS 3.7 UM 3k J8Wn
B4 cm_YGE
COATING PROPERTIES 'F- wC!
1 0 'REFLECT' KAucSd`
0 0 'ABSORB' P sLMV:O9S
MifPZQ
PARABASAL 4 dvAvG.;U
BEAMS COHERENT DIFFRACT zdoJ+zRtK
WIDTHS 1.6 >Bj+!)96q
7eh<>X!TX
A=1 FM)Es&p&
N=32 wap@q6fz<
L=(N)*(A) &3Q!'pJJ
D1=0.625E-3 K9#=@}!3L
D2=(N)*(D1) .%D9leiRe
!! 微阶梯镜======================= i9qn_/<c
$DO -16 15 1 us2X:X)
{SURFACE CO`%eL~
PLANE Z 0 RECTANGLE (A)/2 (L)/2 2&f]v`|M|
OBJECT 'MIRROR2_?' SOq{`~,4B
INTERFACE COATING REFLECT AIR AIR }w0>mA0=H
SHIFT X (A)*?+(A)/2 cZ@z]LY.g
SHIFT Z (D2)*?
f:_\S
} 5w\>Whbd
GROUP MIRROR2_? H>x(c|ZBp
SHIFT Z (L) bvf}r
,`Q7
ROTATE X -90 0 0 XF`,mV4
!! DETECTOR====================== SA| AS<
SURFACE S+mZ.aFS0z
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 |hp_<F9.
OBJECT 'DETECTOR' %V>Ss9;/8
INTERFACE COATING ABSORB AIR AIR \a|FhhI
!! SOURCE ======================= h@5mVTb}i
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) =
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SOURCE DIR 0 1 0 *nv%~t
!! !!TRACE PLOT========================= .#M'
!!WINDOW Y Z s)=fs#%
!!PLOT FACETS 5 5 !!OVERLAY I.f)rMl+h
TRACE!! PLOT Rn(vG-xQ
!!$VIEW _%M5
T
d+1q[,-
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY DriJn`vtzq
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 E^:8Jehq
PIXELS (256) O>Vb7`z0<
SPREAD NORMAL vPm&0,R*y:
DISPLAY 5AvbKT
!! FORM 0.5 eY)JuJ?
PICTURE ? 1OZEzA!
RETURN