It is proved that, when the vector modal theory of coherence is applied to a pair of fixed points, exact results are obtained for the mode structure. In particular, it is shown that the field radiated by the pinholes of a Young interferometer can always be represented by the incoherent superposition of no more than four perfectly correlated and polarized modes. The role of such modes is illustrated through a simple example. (c) 2006 Optical Society of America.
Gori, F., Santarsiero, M., Borghi, R. (2006). Vector mode analysis of a Young interferometer. OPTICS LETTERS, 31(7), 858-860 [10.1364/OL.31.000858].