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? 2!9Zw$
以下是我的ASAP代码,可以拷贝运行一下。 9E0x\%2K
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SYSTEM NEW }OTJ{eG
RESET {wDe#c{_
<'7s3
UNITS MM ,dVJAV7v
WAVELENGTHS 3.7 UM ! CJ*zZ*
}U4mXkZF
COATING PROPERTIES ={;+0Wjb8
1 0 'REFLECT' ?IoA;GBg
0 0 'ABSORB' 4gUx#_AaG
u0g"x_3
PARABASAL 4 j |o&T41
BEAMS COHERENT DIFFRACT y9=<q%Kc-
WIDTHS 1.6 " SP6o
b)E<b{'W
A=1 ,|,kU0xXz
N=32 1?.NJ<)F
L=(N)*(A) GaL UZviJ_
D1=0.625E-3 'C#[iRG4
D2=(N)*(D1) N.ZuSkRM
!! 微阶梯镜======================= 9wO2`e )
$DO -16 15 1 ]mgpd}Y
{SURFACE Pf?15POg&B
PLANE Z 0 RECTANGLE (A)/2 (L)/2 ]9JH.fF
OBJECT 'MIRROR2_?' 7u5H o`
INTERFACE COATING REFLECT AIR AIR
o)DO[
SHIFT X (A)*?+(A)/2 ,e'"SVQc
SHIFT Z (D2)*? tDfHO1pS
} 7VWy1
GROUP MIRROR2_? ta
PqRsvu
SHIFT Z (L) UN:qE oS
ROTATE X -90 0 0 J8Vzf$t};
!! DETECTOR====================== ?32i1F!
SURFACE [nrD4
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 OjqT5<U
OBJECT 'DETECTOR' Nw-U*y
INTERFACE COATING ABSORB AIR AIR >&F:/
!! SOURCE ======================= ~ tN/
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) CVEo<Tz
SOURCE DIR 0 1 0 N%1nii
!! !!TRACE PLOT========================= D";clP05K
!!WINDOW Y Z NLxR6O4}8
!!PLOT FACETS 5 5 !!OVERLAY `0!%jz=
TRACE!! PLOT Ai5+ ;8z+
!!$VIEW cR*~JwC:
|
q elvK*
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY ^D9w=f#a
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 FT-=^VA\
PIXELS (256) (N)>?r@n`
SPREAD NORMAL b^P\Q s*m
DISPLAY 3a=\$x@
!! FORM 0.5 #YK3Ogb,
PICTURE m@0> =s~.
RETURN