| chao183 |
2021-10-21 21:33 |
用matlab计算均匀照度的透镜自由曲线后，为什么用light tools模拟照度却不均匀
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。 4d8}g25C
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是根据这篇论文编的matlab代码。 8xt8kf*k
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[attachment=109395] ;--p/h*.
U.Fs9F4M #
哪位大神指点一下 qV)hCc/ ~
clear; s[;1?+EI
H=20; G2dPm}s ZG
a=100; Dn48?A[v
itheta=0; juA}7
i=1; TPA*z9n+B
for theta=0:0.0001:pi/2 ?!u9=??
if abs(integral(@(y)cos(y),itheta(i),theta)-1/a)<=0.00005 z
.+J\
itheta(i+1)=theta; ul{D)zm\D
i=i+1; >?jmeD3u
end d~KTUgH'<
end F8&L'@m9>
R=30; r2\ }_pIj
r=0; ? CU;
for i=1:a xD 9ZL
r(i+1)=sqrt(R^2/a+r(i)^2); y/>Nx7C0=2
end J4Ca 0Ag
I(:,1)=sin(itheta); +4F; m_G6
I(:,2)=cos(itheta); qOAhBZ~
N=[0,1]; 5& _R+g
P=[0,5]; y*E{X
O=[0,1]; rAk;8)O$
n=1.5896; TVVu_ib
for i=1:a; mr,G H x
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) ); t$PJ*F67M
P(i+1,2)= P(i+1,1) * I(i+1,2) / I(i+1,1); lNMJcl3
O(i+1,1)=( r(i) - P(i+1,1) ) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2); \[
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O(i+1,2)=(H-P(i+1,2)) / sqrt( (r(i)-P(i+1,1))^2 + (H-P(i+1,2))^2 ); BkB9u&s^
N(i+1,=( O(i+1, - n*I(i+1,) / sqrt( 1 + n^2 - 2*n*dot(O(i+1,,I(i+1,) ); zVis"g`
end :4)lmIu
P(:,3)=0; I7C+XUQkQ
plot(P(:,1),P(:,2)); 93/`e}P"o
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[attachment=109396]
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