%
% Optical Imaging and Spectroscopy
%
% David J. Brady
% Duke University
% www.opticalimaging.org
%
% 
function jinC = jinc(x)
%jinc function
jo=besselj(1,pi*(10^-12))./(2*(10^-12));
jinC=besselj(1,pi*(x+10^-12))./(jo*2*(x+10^-12));
return