light tools模拟时都是中心暗，周围有亮圆环。模拟光源为朗伯点光源。 (G 9Ku 8Y
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是根据这篇论文编的matlab代码。 .#_g.0<
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哪位大神指点一下 W:1GY# Pe
clear; r?R!/`f
H=20; DIWcX<s
a=100; 7,ffY/
itheta=0; }q N
i=1; *?!A
for theta=0:0.0001:pi/2 ,a\pdEPj
if abs(integral(@(y)cos(y),itheta(i),theta)-1/a)<=0.00005 WZf}1.Mh*
itheta(i+1)=theta; cpQhg-LY|
i=i+1; V3[>^ZCA
end Zrp9`~_g<!
end 3M[5_OK
R=30; J72 YZrc
r=0; r~sQdf
for i=1:a YA@OA$`E
r(i+1)=sqrt(R^2/a+r(i)^2); B'KZ >jO
end e2Df@ 8>
I(:,1)=sin(itheta); 9 [wR/8Xm
I(:,2)=cos(itheta); cp 5
N=[0,1]; +\~ Mx>Cn
P=[0,5]; YCu9dBeVS
O=[0,1]; h9j /mUwV
n=1.5896; sRSy++FRF
for i=1:a; }zqYn`ffD
P(i+1,1)=( N(i,1)*P(i,1) + N(i,2)*P(i,2) ) / ( N(i,1) + N(i,2)*I(i+1,2)/I(i+1,1) ); QE~#eo
P(i+1,2)= P(i+1,1) * I(i+1,2) / I(i+1,1); h7[PU^ m
O(i+1,1)=( r(i) - P(i+1,1) ) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2); pu5 -=QN
O(i+1,2)=(H-P(i+1,2)) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2 ); =xPBolxm5U
N(i+1,=( O(i+1, - n*I(i+1,) / sqrt( 1 + n^2 - 2*n*dot(O(i+1,,I(i+1,) ); 5# $5ct
end ?iaD;:'qE
P(:,3)=0; X] v.Yk=wu
plot(P(:,1),P(:,2)); ZH=oQV)6
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