Table_2_4_Phase_sinusoidal_grating.m

%%1D sinusoidal phase grating%%
clear; %Clear all memory

% Defining Grating Parameters
N=500; %Define Matrix size
A=ones(1,N); %Define a Matrix by assigning 1 to all pixels
P=100; %Define the period of the grating
FF=0.5; %Define fill factor 

% Constructing the Grating
for q=1:N;
      A(1,q)= exp(1i*0.59*pi*(sin(rem(q,P)*(2*pi)/P)));
end
A=repmat(A,N,1);

%Observing the grating output in the far-field
E=fftshift(fft2(A)); %fftshift is used to re-order the terms in their natural order
IN=(abs(E)/(N*N)).*(abs(E)/(N*N));      % Calculating intensity
figure(1)
colormap(gray); 
imagesc(angle(A))          
figure(2)
colormap(gray);
imagesc(IN);