Polarization effects of resonant mesh structures fabricated on IR-transmitting windows

John P. Kurmer; J. I. Halman; Keith A. Ramsey; D. L. Jones; James McManigal

doi:10.1117/12.22496

1 October 1990 Polarization effects of resonant mesh structures fabricated on IR-transmitting windows

John P. Kurmer, J. I. Halman, Keith A. Ramsey, D. L. Jones, James McManigal

Proceedings Volume 1326, Window and Dome Technologies and Materials II; (1990) https://doi.org/10.1117/12.22496
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

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.

Citation Download Citation

John P. Kurmer, J. I. Halman, Keith A. Ramsey, D. L. Jones, and James McManigal "Polarization effects of resonant mesh structures fabricated on IR-transmitting windows", Proc. SPIE 1326, Window and Dome Technologies and Materials II, (1 October 1990); https://doi.org/10.1117/12.22496

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