Homogeneous and evanescent contributions in scalar near-field diffraction

Appl Opt. 1995 Jun 10;34(17):3055-63. doi: 10.1364/AO.34.003055.


The contributions of homogeneous and evanescent waves to two-dimensional near-field diffraction patterns of scalar optical fields are examined in detail. The total plane-integrated intensities of the two contributions are introduced as convenient measures of their relative importance. As an example, the diffraction of a plane wave by a slit is considered.