Abstract
In many photonics and fiber-optics applications, the irradiance distribution in the very near field (z/ D < 0.25) behind a circular or annular aperture is of interest. We present the results of detailed calculations of the irradiance distribution throughout the entire space behind an annular aperture. Included as a special case of the annular aperture is the circular aperture and the opaque circular disk. A log–log plot over many orders of magnitude in axial distance provides particular insight. The behavior throughout the Fresnel and Fraunhofer region is well known; however, we pay particular attention to the behavior in the near field. A variety of subtle effects in the near field are presented and discussed.
© 2002 Optical Society of America
Full Article | PDF ArticleMore Like This
José A. Ferrari and Alfredo Dubra
Appl. Opt. 42(19) 3754-3755 (2003)
James E. Harvey and Andrey Krywonos
Appl. Opt. 42(19) 3792-3794 (2003)
Virendra N. Mahajan
Appl. Opt. 22(19) 3042-3053 (1983)