It is shown that contrary to some recent claims the far field of a Gaussian beam does not contain contributions from high spatial frequency components of the source. Consequently no evanescent waves take part in the formation of the far field. Corresponding results for other types of wave fields are also briefly discussed.
No takes yet. Share an insight, caveat, or question.
Foley et al. (1979) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: