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 NgPk&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) -QNh 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 v3>UV8c' OBJECT 'MIRROR2_?'
]ZS
OM\} INTERFACE COATING REFLECT AIR AIR Ow,b^| SHIFT X (A)*?+(A)/2 FS1z`wYP SHIFT Z (D2)*? )4 ;`^]F } $*m-R*kt GROUP MIRROR2_? _yR^*}xJb SHIFT Z (L) 'J|_2* ROTATE X -90 0 0 "0TZTa1e !! DETECTOR====================== BMf@M SURFACE dj%!I:Q>u PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 zm;C\s rF OBJECT 'DETECTOR' >yDZw!C INTERFACE COATING ABSORB AIR AIR _q^E,P !! SOURCE ======================= FpU>^'2] GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) Flb&B1 SOURCE DIR 0 1 0 c&Q$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 Z3!`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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