牛顿环演示的MATLAB程序示例。牛顿环，又称牛顿圈，在光学上，牛顿环是一个薄膜干涉现象。 光的一种干涉图样，是一些明暗相间的同心圆环。
代码
% 牛顿环演示的MATLAB程序
close all;clear;clc;
figure('Position',[90 164 873 483]);
L=632.8;R=5;H=5;
a1=axes('Position',[0.83,0.3,0.15,0.4]);
hold on;axis([0,1,0,1]);
plot([0.25,0.25],[0.5,0.8],'k');
plot([0.5,0.5],[0.5,0.8],'k');
plot([0.75,0.75],[0.5,0.8],'k');
fill([0.22,0.25,0.27],[0.5,0.44,0.5],'k');
fill([0.47,0.5,0.52],[0.5,0.44,0.5],'k');
fill([0.72,0.75,0.77],[0.5,0.44,0.5],'k');
z=1.8exp(i(linspace(-0.21,0.21,30)-pi2))+2.1i+0.5;
fill(real(z),imag(z),'w');
rectangle('Position',[0.1,0.18,0.8,0.12]);
set(gca,'xtick',[],'ytick',[],'box','on');
% copyright zjliu
% Author's email zjliu2001@163.com
a2=axes('Position',[0.4,0.16,0.4,0.7]);
[x,y]=meshgrid(linspace(-0.005,0.005,200));
r2=(x.^2+y.^2);
Di=[2H+2(R-sqrt(R^2-r2))1e9]L;
In=abs(cos(Dipi2));
cr=abs(L-560)200;
cg=1-cr;
cb=abs(L-600)240;
Ik(,,1)=Incr;
Ik(,,2)=Incg;
Ik(,,3)=Incb;
Pc=imshow(Ik,[]);
title('the pattern of Newton''s rings','fontsize',18);
Lt=uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.06,0.86,0.21,0.06],...
'BackgroundColor',0.7[1,1,1],'ForegroundColor',[0.8,0.1,0.9],...
'string','波长 632.8nm','fontsize',16,'fontname','times new roman');
s1=uicontrol(gcf,'style','slider',...
'unit','normalized','position',[0.06,0.76,0.21,0.04],...
'BackgroundColor',0.7[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'SliderStep',[0.01,0.01],'value',(632.8-360)400,...
'callback',['L=get(s1,''value'')400+360;',...
'set(Lt,''string'',[''波长 '',num2str(L10),''nm'']);',...
'Di=[2H+2(R-sqrt(R^2-r2))1e9]L;',...
'In=abs(cos(Dipi2));cr=abs(L-560)200;cg=1-cr;',...
'cb=abs(L-600)240;Ik(,,1)=Incr;Ik(,,2)=Incg;',...
'Ik(,,3)=Incb;set(Pc,''CData'',Ik);']);
uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.04,0.81,0.08,0.04],...
'BackgroundColor',0.8[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'string','360','fontsize',16,'fontname','times new roman');
uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.22,0.81,0.08,0.04],...
'BackgroundColor',0.8[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'string','760','fontsize',16,'fontname','times new roman');
Rt=uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.06,0.66,0.23,0.06],...
'BackgroundColor',0.7[1,1,1],'ForegroundColor',[0.8,0.1,0.9],...
'string','曲率半径','fontsize',16,'fontname','times new roman');
s2=uicontrol(gcf,'style','slider',...
'unit','normalized','position',[0.06,0.56,0.21,0.04],...
'BackgroundColor',0.7[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'SliderStep',[0.01,0.01],...
'callback',['R=get(s2,''value'')7+5;',...
'set(Rt,''string'',[''曲率半径 5m'',num2str(R),''m'']);',...
'Di=[2H+2(R-sqrt(R^2-r2))1e9]L;',...
'In=abs(cos(Dipi2));cr=abs(L-560)200;cg=1-cr;',...
'cb=abs(L-600)240;Ik(,,1)=Incr;Ik(,,2)=Incg;',...
'Ik(,,3)=Incb;set(Pc,''CData'',Ik);']);
uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.04,0.61,0.08,0.04],...
'BackgroundColor',0.8[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'string','5','fontsize',16,'fontname','times new roman');
uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.22,0.61,0.08,0.04],...
'BackgroundColor',0.8[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'string','12','fontsize',16,'fontname','times new roman');
Ht=uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.06,0.46,0.23,0.06],...
'BackgroundColor',0.7[1,1,1],'ForegroundColor',[0.8,0.1,0.9],...
'string','气缝厚度 5nm','fontsize',16,'fontname','times new roman');
s3=uicontrol(gcf,'style','slider',...
'unit','normalized','position',[0.06,0.36,0.21,0.04],...
'BackgroundColor',0.7[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'SliderStep',[0.01,0.01],'value',0.05,...
'callback',['H=get(s3,''value'')100;',...
'set(Ht,''string'',[''气缝厚度 '',num2str(H),''nm'']);',...
'Di=[2H+2(R-sqrt(R^2-r2))1e9]L;',...
'In=abs(cos(Dipi2));cr=abs(L-560)200;cg=1-cr;',...
'cb=abs(L-600)240;Ik(,,1)=Incr;Ik(,,2)=Incg;',...
'Ik(,,3)=Incb;set(Pc,''CData'',Ik);']);
uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.04,0.41,0.08,0.04],...
'BackgroundColor',0.8[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'string','0','fontsize',16,'fontname','times new roman');
uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.22,0.41,0.08,0.04],...
'BackgroundColor',0.8[1,1,1],'ForegroundColor',[0.1,0.1,0.9],...
'string','100','fontsize',16,'fontname','times new roman');
%%%% Note
uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.05,0.08,0.68,0.07],...
'BackgroundColor',0.8[1,1,1],'ForegroundColor',[0.8,0.2,0.2],...
'string','颜色和波长的关系可能不准确，我只是根据大致的关系写的',...
'fontsize',16,'fontname','times new roman');
uicontrol(gcf,'style','text',...
'unit','normalized','position',[0.05,0.02,0.6,0.07],...
'BackgroundColor',0.8[1,1,1],'ForegroundColor',[0.9,0.2,0.5],...
'string','仅供参考：qq 10972072',...
'fontsize',16,'fontname','times new roman');
效果
