Experimental modelling with theoretical validation of liquid crystal display elements for UAV optimal (optical) stealth

Christopher R. Lavers; Rob Johnson

doi:10.1117/12.2585165

8 November 2020 Experimental modelling with theoretical validation of liquid crystal display elements for UAV optimal (optical) stealth

Christopher R. Lavers, Rob Johnson

Author Affiliations +

Proceedings Volume 11525, SPIE Future Sensing Technologies; 115252U (2020) https://doi.org/10.1117/12.2585165
Event: SPIE Future Sensing Technologies, 2020, Online Only

Conference Poster

Abstract

Advanced optical stealth technology is increasingly important in the role of aircraft platforms whether manned (e.g. F117A) or unmanned (e.g. X47B Pegasus). Here we consider the concept validity of using low power passive reflective display elements rather than high power active projection to achieve the same result. This paper presents practical consideration towards minimal radiated power, and power requirements using adaptive passive methods. Prism-coupling as a means of probing thin liquid crystal layers to obtain information on optical tensor parameters is possible using the Kraetschmann-Raether configuration. Leaky liquid crystal cells composed of a glass/ITO/aligning layer/liquid crystal/aligning layer/ITO/glass multi-layer structure support guided modes. Optical reflectivity as a function of incident angle and applied voltage are compared with theory generated from a Fresnel matrix formalism. Reflectivities are then simulated across an aircraft platform to evaluate the method for low power consumption and minimal radiated optical radiation.

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Christopher R. Lavers and Rob Johnson "Experimental modelling with theoretical validation of liquid crystal display elements for UAV optimal (optical) stealth", Proc. SPIE 11525, SPIE Future Sensing Technologies, 115252U (8 November 2020); https://doi.org/10.1117/12.2585165

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