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? 1LjYV
以下是我的ASAP代码,可以拷贝运行一下。 Y4Z?`TL
?mt$c6-
SYSTEM NEW GSW{h[Op
RESET 7,e=|%7.
vAJfMUlP
UNITS MM V_(?mC
WAVELENGTHS 3.7 UM ':!;6v|L
J 6S
COATING PROPERTIES ,9#G/nF
1 0 'REFLECT' cQv*lvG9>
0 0 'ABSORB' =fHt|}.K
M{7EFTy!y
PARABASAL 4 \Rp)n=|
BEAMS COHERENT DIFFRACT yg2~qa:dZ
WIDTHS 1.6 d~|qx
xL>0&R
A=1 PSHs<Z47
N=32 )}c$n
L=(N)*(A) `>8|
D1=0.625E-3 :7Vm]xd}do
D2=(N)*(D1) XR\ iQ
!! 微阶梯镜======================= [-$&pB>w8'
$DO -16 15 1 l:HO|Mq
{SURFACE xm YA/wt8
PLANE Z 0 RECTANGLE (A)/2 (L)/2 U)p2PTfB
OBJECT 'MIRROR2_?' oqDW}>.
INTERFACE COATING REFLECT AIR AIR J&a887
SHIFT X (A)*?+(A)/2 3Uag[ms
SHIFT Z (D2)*? J7QlGm,=
} @R2|=ox
GROUP MIRROR2_? mk4%]t"
SHIFT Z (L) v!F(DP.)Z
ROTATE X -90 0 0 4g1u9Sc0
!! DETECTOR====================== JpDYB
SURFACE z7P PwTBa
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 2z[Pw0#V
OBJECT 'DETECTOR' (I[o;0w
INTERFACE COATING ABSORB AIR AIR LwGcy1F.
!! SOURCE ======================= TTE#7\K~B
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) jQ`"Op 3
SOURCE DIR 0 1 0 74Q?%X
!! !!TRACE PLOT========================= T>uLqd{hH
!!WINDOW Y Z D}"GrY5
!!PLOT FACETS 5 5 !!OVERLAY ~hvhT}lE
TRACE!! PLOT Wt3\&.n
!!$VIEW *h =7:*n
TVFGonVY
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY v8%]^` '
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 2%8N<GW.F
PIXELS (256) c~RIl5j
SPREAD NORMAL u8<=FV3
DISPLAY n)K6Z{x
!! FORM 0.5 ldX]A#d.
PICTURE Y*}Sq|y
RETURN