The Huygens–Fresnel principle provides a conceptual understanding for
wave propagation and diffraction. Recently the principle has been reexamined to
suggest that it is also valid in the near field. We reformulate the problem in
terms of nonradiative optics, focusing particularly on the obliquity factor
inherent in the forward-directed propagation of light. In the near field of
matter no explicit obliquity factor exists.
© 1995 Optical Society of America
Equations on this page are rendered with MathJax. Learn more.