Documents / Report
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.
“The Advance”9 pages
UNCLASSIFIED//F8A 8FFHil.l1k WE&i a••k>/ coordinate transformations). This is not a cloaking device: it compresses an extended region of space to a reflecting plate; the interior is hidden behind the plate, but the plate is clearly visible. Such a device conceals the extension and shape of the hidden region but not the fact of hiding itself. A I I I--• 7 - 1- -- - - I- I I 1 I I I 1 1 I I I I T r I I I i -1-1- I I I i j 1 I I I I I I I ~ 1 1 ·- • l T ' I-,-:--1-•-· - _,- i - • _, - L_ I •- L Figure 22. Coordinate Transformation Implemented by a Ground-Plate Cloak B r 1 -r -r ~ -, - 1-1-:--t-:----1 . . ' ----,. - ' -,_ - ' -• - . ' '- I- - • - I r C ] • - j _!- J In order to implement the ground-plate cloak, thousands of cells with split-ring resonators with individual, tailor-made electromagnetic properties were designed, as Figure 23 shows. X •..C •> 1, 0 "•0: •> j •0: Figure 23. Implementation of the Ground-Plate Cloak38 21 1 2, 1G "-1 - I 0 TC a(rnm) UNCLASSIFIED/ ,'F&II. &FFUiil'°'I! l!llili a,112~·
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 29 pages are in the text index: search them above, or from the library's search.