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? Lq yY??\@
以下是我的ASAP代码,可以拷贝运行一下。 pbu 8Ib8z
norWNm(n
SYSTEM NEW 8c#u"qF
RESET {>Zc#U'
$ U<xrN>O
UNITS MM BK,=(;d3
WAVELENGTHS 3.7 UM )t=Cj?5
A|jaWZM-
COATING PROPERTIES RXh/[t+
1 0 'REFLECT' R}*e% EG/
0 0 'ABSORB' afH`<!
`_<K#AG Ai
PARABASAL 4 Riw#+#r]/
BEAMS COHERENT DIFFRACT >Efv?8$E\
WIDTHS 1.6 $/6.4"j
\acjv|]
A=1 m"NZ; *d '
N=32 ><dSwwu
L=(N)*(A) fH>]>2fS
D1=0.625E-3 |0dmdrKD
D2=(N)*(D1) z6$W@-Vd
!! 微阶梯镜======================= ?-Fp rC
$DO -16 15 1 m@)K]0g<f
{SURFACE wS#.Wzp.w
PLANE Z 0 RECTANGLE (A)/2 (L)/2 (@~d9PvB>
OBJECT 'MIRROR2_?' dtr8u
INTERFACE COATING REFLECT AIR AIR na_Y<R`
SHIFT X (A)*?+(A)/2 )9,9yd~SI
SHIFT Z (D2)*? GRS[r@W[1
} ?$v#;n?@I
GROUP MIRROR2_? "^yTH/m
SHIFT Z (L) Av]<[ F/
ROTATE X -90 0 0 Xh;Pbm|K
!! DETECTOR====================== 94LFElE3
SURFACE ._Wm%'uX
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 \XD&0inv
OBJECT 'DETECTOR' zaf%%
INTERFACE COATING ABSORB AIR AIR I HgYgn
!! SOURCE ======================= Q
>] v?4
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) "8>*O;xk
SOURCE DIR 0 1 0 kTt;3 Ia
!! !!TRACE PLOT========================= dr'#
!!WINDOW Y Z '/G.^Zl9
!!PLOT FACETS 5 5 !!OVERLAY P'xq+Q
TRACE!! PLOT x~rIr#o
!!$VIEW H[BY(a@c
vE^Hk!^
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY IMpEp}7
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 |W<wPmW_{+
PIXELS (256) fE8/tx](
SPREAD NORMAL q;1]M[&
DISPLAY qQv?J]l
!! FORM 0.5 ayTEQS
PICTURE AtGk
_tpVZ
RETURN