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Proceedings Paper

Polarization effects of resonant mesh structures fabricated on IR-transmitting windows
Author(s): John P. Kurmer; J. I. Halman; Keith A. Ramsey; D. L. Jones; James McManigal
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Paper Abstract

The use of wire grid structures to block EMI radiation is well known. For the past several years Battelle has been developing photolithographic techniques and computer models to predict the performance of wire grid structures on IR transmitting windows. The amount of IR radiation transmitted through non-resonant grid structures is limited to the percent open area of the window. As the wires of the grid structure are placed closer together the area of the window not obscured by the grid decreases. Resonant grid (mesh) structures have the potential for superior JR transmission at specific wavelengths, while providing adequate EMI attenuation. The polarization of the IR radiation becomes important when non-normal angles of incidence are considered. A computer model has been developed to predict the performance of wire grid structures on windows for various angles of incidence and polarization. This model has been experimentally verified for a number of cases and has been shown to be useful in designing windows incorporating EMI shielding. The results of the modeling for several cases, along with the experimental verification, are presented. The limitations of such techniques are also discussed.

Paper Details

Date Published: 1 October 1990
PDF: 11 pages
Proc. SPIE 1326, Window and Dome Technologies and Materials II, (1 October 1990); doi: 10.1117/12.22496
Show Author Affiliations
John P. Kurmer, Battelle Memorial Institute (United States)
J. I. Halman, Battelle Memorial Institute (United States)
Keith A. Ramsey, Battelle Memorial Institute (United States)
D. L. Jones, U.S. Army Missile Command (United States)
James McManigal, Naval Weapons Ctr. (United States)

Published in SPIE Proceedings Vol. 1326:
Window and Dome Technologies and Materials II
Paul Klocek, Editor(s)

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