OCT Plots a synthetic OCT image
SYNTAX; oct;
by Chuck DiMarzio Northeastern University August 2009
!! This file may be copied, used, or modified for educational and !! research purposes provided that this header information is not !! removed or altered, and provided that the book is cited in !! publications, as DiMarzio, Charles A., Optics for Engineers, !! CRC Press, Boca Raton, FL, 2011. !! http://www.crcpress.com !! Other distribution is prohibited without permission.
Contents
Set up parameters
lambda=830e-9; % Wavelength, m cl=5*lambda; % Coherence length dz=(-5:0.1:11)*lambda; % difference in paths in Michaelson interferometer e1mag=1;e2mag=0.1; % Field magnitudes at detector
Compute and plot OCT signal for one target
gamma=exp(-(dz/(cl/2)).^2); % autocorrelation function signal=e1mag^2+e2mag^2+2*e1mag*e2mag*gamma.*cos(2*pi*2*dz/lambda); fig1=figure; plot(dz*1e6,signal);grid on; xlabel('dz, Path Difference, \mu m'); ylabel('Signal');

Now do a second target
e2mag=0.05; loc2=8*lambda; % Location of second target gamma=exp(-((dz-loc2)/(cl/2)).^2); % autocorrelation function signal=signal+... e1mag^2+e2mag^2+2*e1mag*e2mag*gamma.*cos(2*pi*2*(dz-loc2)/lambda); fig2=figure; plot(dz*1e6,signal);grid on; xlabel('dz, Path Difference, \mu m'); ylabel('Signal');
