| 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？ rx|pOz,:
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。
;i+jJ4
iH@UTE ;
SYSTEM NEW =Xr.'(U
RESET NgP k&niM
gPPkT"
UNITS MM | +9&rAg
WAVELENGTHS 3.7 UM i/Zd8+.n$
[7y]n;Fy
COATING PROPERTIES ckCE1e>s
1 0 'REFLECT' [ 4)F f
0 0 'ABSORB' vFmZ<C'
)
]Y&VT7+Z
PARABASAL 4 9->if/r,o
BEAMS COHERENT DIFFRACT eHUOU>&P]
WIDTHS 1.6 (tW`=]z-<
~P-mC@C
A=1 'I;zJ`Trd
N=32 pQB."[n
L=(N)*(A) -Q Nh
D1=0.625E-3 `R^g U]Z,
D2=(N)*(D1) $F.a><1rY
!! 微阶梯镜======================= ;O,jUiQ
$DO -16 15 1 (TM,V!G+U~
{SURFACE @H8EWTZ
PLANE Z 0 RECTANGLE (A)/2 (L)/2 v 3>UV8c'
OBJECT 'MIRROR2_?'
]ZS
OM\}
INTERFACE COATING REFLECT AIR AIR Ow ,b^|
SHIFT X (A)*?+(A)/2 FS1z`wYP
SHIFT Z (D2)*? )4 ;`^]F
} $*m-R*kt
GROUP MIRROR2_? _yR^*}xJb
SHIFT Z (L) 'J|_2*
ROTATE X -90 0 0 "0TZTa1e
!! DETECTOR====================== BMf@ M
SURFACE dj%!I:Q>u
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 z m;C\s rF
OBJECT 'DETECTOR' >yDZw!C
INTERFACE COATING ABSORB AIR AIR _q^E,P
!! SOURCE ======================= FpU>^'2]
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) Flb&B1
SOURCE DIR 0 1 0 c&Q$L }
!! !!TRACE PLOT========================= I%Z
!!WINDOW Y Z HxI"
8A
!!PLOT FACETS 5 5 !!OVERLAY TD_Oo-+\
TRACE!! PLOT V(*(F7+
!!$VIEW /qw.p#
f%hEnZv
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY Z 3!`J&
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 T51
`oZ`
PIXELS (256) `r_/Wt{g
SPREAD NORMAL FVBYo%Ap
DISPLAY fF kj+
!! FORM 0.5 (7*}-Uy[C
PICTURE =vhm}
RETURN
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