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Proceedings Paper

Predicted and measured transmission and diffraction by a metallic mesh coating
Author(s): Jennifer I. Halman; Keith A. Ramsey; Michael Thomas; Andrew Griffin
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Paper Abstract

Metallic mesh coatings are used on visible and infrared windows and domes to provide shielding from electromagnetic interference (EMI) and as heaters to de-fog or de-ice windows or domes. The periodic metallic mesh structures that provide the EMI shielding and/or resistive electrical paths for the heating elements create a diffraction pattern when optical or infrared beams are incident on the coated windows. Over the years several different mesh geometries have been used to try to reduce the effects of diffraction. We have fabricated several different mesh patterns on small coupons of BK-7 and measured the transmitted power and the diffraction patterns of each one using a CW 1064 nm laser. In this paper we will present some predictions and measurements of the diffraction patterns of several different mesh patterns.

Paper Details

Date Published: 27 April 2009
PDF: 8 pages
Proc. SPIE 7302, Window and Dome Technologies and Materials XI, 73020Y (27 April 2009); doi: 10.1117/12.818760
Show Author Affiliations
Jennifer I. Halman, Battelle Memorial Institute (United States)
Keith A. Ramsey, Battelle Memorial Institute (United States)
Michael Thomas, Spica Technologies, Inc. (United States)
Andrew Griffin, Spica Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 7302:
Window and Dome Technologies and Materials XI
Randal W. Tustison, Editor(s)

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