| 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？ yj(vkifEB
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 H<G4O02i_
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SYSTEM NEW =@5x"MOz
RESET }O4se" xK
08m;{+|vY
UNITS MM `K
>?ju"
WAVELENGTHS 3.7 UM AisN@
*VkgQ`c
COATING PROPERTIES 7RvUH-S[
1 0 'REFLECT' 6 Ik,zQL
0 0 'ABSORB' DK&h
eVIoZ
Y}D onF
PARABASAL 4 @v*/R%rv t
BEAMS COHERENT DIFFRACT (?b@b[D~4
WIDTHS 1.6 Wi}FY }f
`ZaT} # Y
A=1 {A o,t+j
N=32 5')8r ';,
L=(N)*(A) tB' V
D1=0.625E-3 oiX"Lz{
D2=(N)*(D1) P~FUS%39"o
!! 微阶梯镜======================= :9|W#d{o
$DO -16 15 1 oQj =;[
{SURFACE 8Z2.`(3c[
PLANE Z 0 RECTANGLE (A)/2 (L)/2 -n? g~(/P
OBJECT 'MIRROR2_?' ._96*r=o
INTERFACE COATING REFLECT AIR AIR <vbIp&
SHIFT X (A)*?+(A)/2 6dEyv99
SHIFT Z (D2)*? ] fI/(e_U
} 7a$ G@
GROUP MIRROR2_? ^SfS~G Q
SHIFT Z (L) 1 Ee>S\9t
ROTATE X -90 0 0 te4= S
!! DETECTOR====================== v}v 5
SURFACE Us~ X9n_F
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 )Os Lrq/
OBJECT 'DETECTOR' 7CB#Y P?E
INTERFACE COATING ABSORB AIR AIR 8 )\M:s~7&
!! SOURCE ======================= ]^\8U2q}
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) Q: |w%L*E
SOURCE DIR 0 1 0 K$REZ e
!! !!TRACE PLOT========================= pD@zmCU
!!WINDOW Y Z Gr(|R a .
!!PLOT FACETS 5 5 !!OVERLAY 6b Z[Kt
TRACE!! PLOT t^tCA -
!!$VIEW YTU.$t;Ez
lg1PE7
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY zSjgx_#U
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 1{2eY%+ C
PIXELS (256)
c~dM`2J,
SPREAD NORMAL '?Iif#Z1
DISPLAY u&TdWZe
!! FORM 0.5 2#_38=K =@
PICTURE 9F + P@Kp
RETURN
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