Abstract

We have measured the surface current densities on the shadow sides of diffracting disks for normally incident microwaves and compared our results with Andrejewski’s calculations from exact electromagnetic theory. We employed diameters of disks ranging from 3 to 30 cm and wavelengths ranging from 2.5 to 30 cm. The most-reliable measurements were made for ratios of diameter to wavelength in the range of 0.3 to 3.0. The checks between experiment and theory give us added confidence that we can measure the tangential magnetic fields and associated surface-current densities over any conducting surface.

© 1975 Optical Society of America

Near-field diffraction on the axes of disks*

Intaik Chung, C. L. Andrews, and L. F. Libelo
J. Opt. Soc. Am. 67(11) 1561-1566 (1977)

Absolute measurement of very low sodium-vapor densities using laser resonance fluorescence*

W. M. Fairbank, T. W. Hänsen, and A. L. Schawlow
J. Opt. Soc. Am. 65(2) 199-204 (1975)

Detection of ²⁰Na atoms and measurement of sodium-vapor densities by means of atomic-resonance fluorescence

F. C. M. Coolen and H. L. Hagedoorn
J. Opt. Soc. Am. 65(8) 952-955 (1975)

Scattering of two coherent light beams

Ming Chiang Li
J. Opt. Soc. Am. 65(5) 586-593 (1975)

Ellipsometry of a biaxial surface

D. J. De Smet
J. Opt. Soc. Am. 65(5) 542-547 (1975)