In the literature on coherence theory one almost invariably specifies any correlations that may exist in the source region by means of a correlation function of the field variable. However, when the source is a primary one, it seems more appropriate to specify the correlations by means of a correlation function of the source variable. In the present paper some basic formulas are derived, relating to coherence and radiant intensity in fields generated by primary sources in terms of a source correlation function. A number of results are obtained that exhibit the connection between the "field description" and the "source description." Several illustrative examples are given relating to Gaussian-correlated sources and to Lambertian sources.
© 1978 Optical Society of America
E. Wolf and W. H. Carter, "Coherence and radiant intensity in scalar wave fields generated by fluctuating primary planar sources," J. Opt. Soc. Am. 68, 953-964 (1978)