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 4 Original source ↗

UNCLASSIFIED/ ;'f81il 8ffllil.t.k Wfili IH.k\f
Figure 12. Lycurgus Cup (British Museum; AD Fourth Century) ........................... 11
Figure 13. Idea for a Cloaking Device for Visible Light ......................................... 12
Figure 14. Advances in Metamaterials .................................................................. 13
Figure 15. Demonstration of Negative Refraction With "Bulk" Optical
Metamaterials Made of Nano-Fishnets ................................................. 14
Figure 16. Demonstration of Negative Refraction With "Bulk" Optical
Metamaterials Made of Nanowires ....................................................... 15
Figure 17. Fundamental Problem of Transformation-Based Cloaking Devices ...... 16
Figure 18. Wave Packets are Made by Combining Waves With Different
Frequencies ......................................................................................... 17
Figure 19. Stereographic Projection ..................................................................... 18
Figure 20. Non-Euclidean Cloaking Device in Two Dimensions ............................. 19
Figure 21. Three-Dimensional Cloaking ................................................................ 20
Figure 22. Coordinate Transformation Implemented by a Ground-Plate Cloak ..... 21
Figure 23. Implementation of the Ground-Plate Cloak ......................................... 21
iv
UNCLASSIFIED/;CEiOAt OFFI&l11J.k WliEii IU.blif

Not linked to a story yet.

About this file

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.