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? ,pR.HCR#Y
以下是我的ASAP代码,可以拷贝运行一下。 08F~6e6a8
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SYSTEM NEW 1y7FvD~ v
RESET C[Nh>V7=
Fd1jElt
UNITS MM 23*OuY
WAVELENGTHS 3.7 UM akV-|v_
FN"Ye*d
COATING PROPERTIES k5o{mWI b
1 0 'REFLECT' #55_hY#
0 0 'ABSORB' _8&a%?R@W
iNv"!'|
PARABASAL 4 C jZIBMGc
BEAMS COHERENT DIFFRACT WIYWql>*
WIDTHS 1.6 ` <IaQY
-mqL[ h,
A=1 yLEAbd%+
N=32 -AZ\u\xCB
L=(N)*(A) !A'3Mw\Nm
D1=0.625E-3 GyLp&aa
D2=(N)*(D1) G}#p4\/
!! 微阶梯镜======================= ]Pf!wv
$DO -16 15 1 )kvrQ6
{SURFACE @ *n oma
PLANE Z 0 RECTANGLE (A)/2 (L)/2 ) 8 %lZ{
OBJECT 'MIRROR2_?' JlhI3`X;/
INTERFACE COATING REFLECT AIR AIR gRg8D{
SHIFT X (A)*?+(A)/2 s>ohXISB[
SHIFT Z (D2)*? 8&c:73=?X
} $n_ax\15
GROUP MIRROR2_? Uj twOv|pF
SHIFT Z (L) h_\OtoRa
ROTATE X -90 0 0 *IIuGtS
!! DETECTOR====================== `{ ` W-C
SURFACE .F/0:)
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 QR{>]I
OBJECT 'DETECTOR' iE,/x^&,&
INTERFACE COATING ABSORB AIR AIR rL|9Xru
!! SOURCE ======================= m
e2$ R>@
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) I
T gzD"d
SOURCE DIR 0 1 0 6@-O#,]J
!! !!TRACE PLOT========================= b0uWUI(=
!!WINDOW Y Z PXo^SHJ+gt
!!PLOT FACETS 5 5 !!OVERLAY O~D]C
TRACE!! PLOT Z=zD~ka
!!$VIEW 37 d-!
)}i|)^J
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY g^[BnP)I
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 A75z/O{
PIXELS (256) F~wqt7*
SPREAD NORMAL B~47mw&b
DISPLAY } T&~DVM
!! FORM 0.5 } bm ^`QY
PICTURE 1R"Z+tNB
RETURN