Defense Intelligence Reference Document Invisibilty Cloaking Theory And Experiments

Defense Intelligence Agency · 29 pages · text from the file's own layer

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.

Open the PDF at page 19 Original source ↗

“Nevers”4 pages

p. 16 …The Romans most probably never understood why ruby glass is neither golden like gold nor transparent…
p. 22 …through each point outside out of straight line goes exactly one parallel line; parallels never meet…
p. 24 …Alternatively, some lines on the sphere are never crossed by light rays. Such lines can be…
p. 25 …Alternatively (D), one could expand the red line that light never crosses to create a hidden…

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Report, from the dia collection. The PDF is mirrored here; the original link is under it. 29 pages are in the text index: search them above, or from the library's search.