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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 67, Iss. 11 — Nov. 1, 1977
  • pp: 1561–1566

Near-field diffraction on the axes of disks

Intaik Chung, C. L. Andrews, and L. F. Libelo  »View Author Affiliations


JOSA, Vol. 67, Issue 11, pp. 1561-1566 (1977)
http://dx.doi.org/10.1364/JOSA.67.001561


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Abstract

We have measured the near-field diffraction on the axis, shadow side of a perfectly conducting disk with precision an order of magnitude higher than previously available. The normally incident plane-polarized plane wave had a wavelength of 10 cm. The higher precision was obtained by use of a small, photoetched, electric probe antenna of gold on an alumina substrate with a microscopic Schottky diode at the center of the dipole detector. The small probe required a magnetron source of 10 W output at the distance of 10 m in a tapered anechoic chamber. Scans were made with 70 aluminum disks ranging in diameters from 0.04 to 2.50 wavelengths. The scans extended from the disk to a distance of two diameters. The first maximum for a resonant disk, circumference 1.1 wavelengths, and a distance from the disk of 0.65 disk diameters was |E|2/|E0|2 = 1.54.

© 1977 Optical Society of America

Citation
Intaik Chung, C. L. Andrews, and L. F. Libelo , "Near-field diffraction on the axes of disks," J. Opt. Soc. Am. 67, 1561-1566 (1977)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-67-11-1561

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