| 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？ xYq8\9Qb
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 Gy5W;,$q
:1I ,:L
SYSTEM NEW TnrMR1Zx
RESET }9JPSl28Jr
:0l(Ll KD
UNITS MM wKN9HT
WAVELENGTHS 3.7 UM 1vr/|RWW
A{k@V!A%
COATING PROPERTIES =G`m7!Q)
1 0 'REFLECT' {rDZKy^f
0 0 'ABSORB' 6)8']f
g|oPRC$I'
PARABASAL 4 aap:~F{]X
BEAMS COHERENT DIFFRACT >X]<s^
WIDTHS 1.6 OkM>
K':f!sZ&2
A=1 gDrqs >8
N=32 }`X$
'
L=(N)*(A) |cacMgly
D1=0.625E-3 +q(D]:@,[
D2=(N)*(D1) n.)- aRu[
!! 微阶梯镜======================= hH\(> 4l
$DO -16 15 1 A, os rv
{SURFACE =[$*PTe
PLANE Z 0 RECTANGLE (A)/2 (L)/2 GZ%R fK yQ
OBJECT 'MIRROR2_?' *e R$
INTERFACE COATING REFLECT AIR AIR sdY6_ HtE
SHIFT X (A)*?+(A)/2 < 5.{ +!BM
SHIFT Z (D2)*? w? [)nlNW
} c:bB4ch}
GROUP MIRROR2_? TCYnErqk
SHIFT Z (L) e1#}/U
ROTATE X -90 0 0 hN.#ui5 $
!! DETECTOR====================== _MR2,m C
SURFACE F-nt7l
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 _^B+Xo@E-
OBJECT 'DETECTOR' tf, _4_7#$
INTERFACE COATING ABSORB AIR AIR v-kH7H"z
!! SOURCE ======================= [x&&N*>N
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) o 8" [6Ys
SOURCE DIR 0 1 0 6* e:ey U
!! !!TRACE PLOT========================= ?E`J-ncP
!!WINDOW Y Z ,W#y7 t
!!PLOT FACETS 5 5 !!OVERLAY U> >J_2
TRACE!! PLOT qIk6S6
!!$VIEW 1ayxE(vMcX
,Y a&M@^Z
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY DN!EsQ6
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 ZE :oK
PIXELS (256) -{O2Nv- ]]
SPREAD NORMAL aRV<y8{9
DISPLAY 2XE4w# [j
!! FORM 0.5 \nLO.,
PICTURE TiOvrp 7B
RETURN
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