diff options
Diffstat (limited to 'abcd.m')
-rw-r--r-- | abcd.m | 51 |
1 files changed, 0 insertions, 51 deletions
@@ -1,51 +0,0 @@ -function fs_abcd = abcd_free_space( distance) - fs_abcd=[1, distance; 0,1]; -endfunction - -function lens_abcd =abcd_lens(focal_distance) - lens_abcd = [1, 0; -1/focal_distance, 1]; -endfunction - -function qnew=q_after_abcd(q_old,abcd) - qnew=(q_old*abcd(1,1)+abcd(1,2))/(q_old*abcd(2,1)+abcd(2,2)); -endfunction - - -function optics = arrange_optics_along_x(optics_unsorted) -% arrange optics in proper order so its x position increases with consequent index - N=length(optics_unsorted); - - % assign x positions - x=zeros(1,N); - for i=1:N - x(i)=optics_unsorted{i}.x; - end - - [xs,indx]=sort(x); - cntr=1; - for i=indx - optics{cntr}=optics_unsorted{i}; - cntr=cntr+1; - end -end - - - - -function [waste,radius] =q2wr(q, lambda) -% convert Gaussian beam q parameter to waste and radius - waste=sqrt (-lambda./pi./imag(1./q)); - radius=(1./real(1./q)); -endfunction - - -function q=wr2q(waste,R,lambda) -% convert Gaussian beam waste and radius to q parameter - q=1./(1./R-1i.*lambda./pi./(waste.^2)); -endfunction - - - - - - |