A systematic study of the joint spatial–directional localization features of monochromatic wave fields focused at a complex point is presented, on the basis of recently introduced measures of spatial and directional spread for wide-angle wave fields. Such features are compared with those of a class of fields defined to achieve the theoretical minimum product of these spread measures. It is found that the two classes of fields are remarkably similar.
© 2006 Optical Society of America
Original Manuscript: June 2, 2005
Revised Manuscript: September 2, 2005
Manuscript Accepted: September 16, 2005
Miguel A. Alonso, Riccardo Borghi, and Massimo Santarsiero, "Joint spatial-directional localization features of wave fields focused at a complex point," J. Opt. Soc. Am. A 23, 933-939 (2006)