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diff --git a/README b/README
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+coupling_angles.m  - calculates parameters of the beam to be coupled into the disk via prism
+beam_trace.m  - calculates beams propagation and their branching on dielectric interfaces (faces) for arbitrary set of beams and faces.
+example_beam_trace.m - example use of above routine.
+
+rest of the code: helper functions
diff --git a/TODO b/TODO
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+* Add an plotting functions which plot only beams and faces 
+  after calculations of all beams done.
+