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? q|]0on~]
以下是我的ASAP代码,可以拷贝运行一下。 bN7 UO
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SYSTEM NEW #ejw@bd
RESET Kt!IyIa;Ht
*?R\[59
UNITS MM mC[U)` ey
WAVELENGTHS 3.7 UM _WjETyh
[H
l_j<aCY?|
COATING PROPERTIES 5w [=
1 0 'REFLECT' ,Dii?P
0 0 'ABSORB' rO?x/{;ai
+GPT:\*q6
PARABASAL 4 ;MRC~F=
BEAMS COHERENT DIFFRACT 7N59B z
WIDTHS 1.6 v<J;S9u=
U)I `:J+A
A=1 ?:''VM.
N=32 (HrkUkw
L=(N)*(A) mTuB*
D1=0.625E-3 @y\{<X.F\1
D2=(N)*(D1) VgZaDd;
!! 微阶梯镜======================= b-(UsY:
$DO -16 15 1 u0oYb_Yv
{SURFACE )`+@j.75
PLANE Z 0 RECTANGLE (A)/2 (L)/2 8$<AxNR
OBJECT 'MIRROR2_?' N7I71q|
INTERFACE COATING REFLECT AIR AIR j'40>Ct=i
SHIFT X (A)*?+(A)/2 h3d\MYO)B
SHIFT Z (D2)*? noUZ9M|hz
} +S5_J&~
GROUP MIRROR2_? a6k(O8Ank3
SHIFT Z (L) 9X{nJ"
ROTATE X -90 0 0 X-N$+[#
!! DETECTOR====================== hpz*jyh8
SURFACE c>i*HN}Z|
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 ks#Z~6+3
OBJECT 'DETECTOR' n40MP5RxY
INTERFACE COATING ABSORB AIR AIR if!`Qid
!! SOURCE ======================= i(f;'fb*
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) !E:Vn *k;
SOURCE DIR 0 1 0 Y\z\{JW
!! !!TRACE PLOT========================= `w=H'"Zv
!!WINDOW Y Z J_[[BJ&}x
!!PLOT FACETS 5 5 !!OVERLAY 5f*'wA
TRACE!! PLOT L|1zHDxQ
!!$VIEW Nb!6YY=Ez-
O"^a.`27
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY x^O2Lj,w\
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 @ Rb1)$~#
PIXELS (256) TX
[%s@C
SPREAD NORMAL .q9|XDqQc
DISPLAY |UDD/e
!! FORM 0.5 %FWfiFV|<
PICTURE //5_E7Ehu$
RETURN