We study how a converging spherical wave gets distorted by a plane dielectric interface. The fields in the second medium are obtained by evaluating the m-theory diffraction integral on the interface. The loss of intensity and the form of the intensity distribution are investigated. Examples are presented for various refractive-index contrasts and depths of focus. In general the intensity gets spread out over a volume that is large compared with the case without refractive-index contrast. It was found that moving the focusing lens a distance d toward the interface does not result in an equal shift of the intensity profile. This latter point has important practical implications.
© 1996 Optical Society of AmericaFull Article | PDF Article
More Like This
Taco D. Visser and Sjoerd H. Wiersma
J. Opt. Soc. Am. A 9(11) 2034-2047 (1992)
S. H. Wiersma, P. Török, T. D. Visser, and P. Varga
J. Opt. Soc. Am. A 14(7) 1482-1490 (1997)
J. Opt. Soc. Am. A 15(12) 3009-3015 (1998)