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Homework Help: Matlab help please...

  1. Nov 14, 2015 #1
    1. The problem statement, all variables and given/known data
    i want to make matlab coding which is similar to this program.
    --> http://www.filmetrics.com/reflectance-calculator

    if i put n layers which is consists of each different n(refractive index), l(length),
    then it will calculate M=M1*M2+M3...*Mn, and calculate R. and plot R with wavelength.
    2. Relevant equations

    3. The attempt at a solution
    wl = 350*10^(-9):10^(-9):850*10^(-9);
    ns = 1.5;
    n0 = 1;
    R = [0];
    R_result=[1 1; 1 1];
    M_result=[1 1; 1 1];
    S_result=[1 1; 1 1];

    p = input('How many layers do you want? ');

    for k=1:p
    n(1,k) = input('Enter refractive coefficient of layer');
    l(1,k) = input('Enter length of layer');
    for ws = 1:501
    A(k,ws) = cos((2*pi)*l(1,k))/wl(1,ws);
    B(k,ws) = (-i*sin((2*pi)*l(1,k))/wl(1,ws))/n(1,k);
    C(k,ws) = -i*n(1,k)*sin((2*pi)*l(1,k))/wl(1,ws);
    D(k,ws) = cos((2*pi)*l(1,k))/wl(1,ws);

    %this is attemt to make.....
    for wt = 1:501
    for ws_1=1:501

    for k_1=1:p
    M_result(:,:,ws_1) = [A(k_1,ws_1) B(k_1,ws_1) ; C(k_1,ws_1) D(k_1,ws_1)];

    for ws_1 = 1:501
    S_result(:,:,wt) = S_result(:,:,wt) * M_result(:,:,ws_1);


    Attached Files:

  2. jcsd
  3. Nov 16, 2015 #2


    User Avatar
    Gold Member

    tell us what the output is.... is it different then desired?
    If so how?
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