Defense Intelligence Reference Document Invisibilty Cloaking Theory And Experiments

This Defense Intelligence Reference Document, dated 2 March 2010 and produced by the Defense Intelligence Agency under its Advanced Aerospace Weapon System Applications (AAWSA) Program, is a technical survey of invisibility. It covers camouflage, including stealth aircraft and optical camouflage, then transparency, cloaking by coordinate transformation, metamaterials and non-Euclidean broadband cloaking. It concludes that perfect cloaking is impossible but imperfect microwave cloaks are within reach of present technology. Whether cloaking will work at visible wavelengths remains unclear.

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Invisibility Cloaking: Theory and Experiments
Introduction
The idea of invisibility has fascinated people for millennia, inspiring many
myths, novels, and films. Invisibility cloaking has recently become a subject of
science and technology. This paper describes the important current theoretical
and experimental developments and tries to project into the future.
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