| yuwenhui2008 |
2015-07-26 20:41 |
用ASAP高斯光束分解的方法遇到的问题
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？ om7`w
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以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 U,3d) ]Zy&
Cj$H[K}>
SYSTEM NEW =8S}Iat
RESET b]dxlj}
<
\Ut S>4w\
UNITS MM {Tx 3$eU
WAVELENGTHS 3.7 UM Y\u_+CG*
/'Bdq?!B&
COATING PROPERTIES J3\)Jy
1 0 'REFLECT' 4sd-zl$Of
0 0 'ABSORB' dP3VJ3+
%
s=\7)n=,M
PARABASAL 4 R1 qMg+
BEAMS COHERENT DIFFRACT g*r/ u;
WIDTHS 1.6 Isp_U5M
]n1D1
A=1 X)NWX9^;'
N=32 W H;xq^
L=(N)*(A) GG>Y/;^
D1=0.625E-3 0nT%Slbih
D2=(N)*(D1) dp< au A
!! 微阶梯镜======================= 7 NUenCdc
$DO -16 15 1 f<=^ 4 a
{SURFACE w}b<D#0XC
PLANE Z 0 RECTANGLE (A)/2 (L)/2
4I1K vN<A
OBJECT 'MIRROR2_?' cqHw^{'8
INTERFACE COATING REFLECT AIR AIR Y(W{J d+
SHIFT X (A)*?+(A)/2 Vd [ 2u
SHIFT Z (D2)*? ;y ,NC2Xj
} 4Qhx[Hv>(
GROUP MIRROR2_? UR\Z N @O
SHIFT Z (L) 9 G((wiE
ROTATE X -90 0 0 k2wBy'M .'
!! DETECTOR====================== ~W /}:;
SURFACE ?P YNE
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 0. (zTJ
OBJECT 'DETECTOR' g)nXo:)&
INTERFACE COATING ABSORB AIR AIR >T(M0Tkt
!! SOURCE ======================= 1y(iE C
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) =QTmK/(|B
SOURCE DIR 0 1 0 * \C}Ok=
!! !!TRACE PLOT========================= yvS^2+jW
!!WINDOW Y Z i~ROQMN1
!!PLOT FACETS 5 5 !!OVERLAY *+&z|Pwv[^
TRACE!! PLOT e8 v; D
!!$VIEW r8<JX5zyuo
Ckw83X
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY i$g|?g~]
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 NywB 3
PIXELS (256) U=M#41J
SPREAD NORMAL ltP
DISPLAY Bac?'yp m
!! FORM 0.5 *(>Jd|C
PICTURE *j/ uihY
RETURN
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