Thanks bkopto.
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Posted on 10/10/2011 8:20:16 PM PDT by bkopto
Researchers from Boston-area Fractal Antenna Systems, Inc., report additional measurements that confirm its claims of a working ‘invisibility cloak’.
In March, 2009, the firm’s research group disclosed the first invention of the invisibility cloak. It had unprecedented ability to work ‘wideband’ and render an object invisible to microwaves. The wideband aspect also demonstrated a path for making invisibility cloaks in the full spectrum of visible light. A previous invisibility cloak effort by Duke University-based researchers had shown some degree of cloaking , but over a narrow frequency band. That cloaking also rendered the object partially detectable/visible by the presence of shadows.
The firm’s unprecendented invisibility cloak uses layers of state of the art metamaterial, made from self repeated designs called fractals. The layers surround the object to be cloaked like an onion skin. The microwaves slip stream around the object and its cloak layers.
The new measurements by the firm’s researchers concentrate on the scattering, which details how much of the impinging waves bounce off the sides, the front, and the back of the invisibility cloak. Previous reports showed how the area in back of the cloak acts in a ‘see around’ fashion, as expected. The new measurements show additionally what happens to the waves when viewed from the sides and towards the front. A true invisibility cloak must ‘scatter’ these waves in a minimal way, as if no obstacle was there at all. The new measurements confirm this minimal scattering behavior, which is essential for true invisibility.
Using copper layers in place of the invisibility cloak, an experimental ‘control’ demonstrated the effect was not a remnant of some other effects: the control showed substantial shadowing from the back and the sides, which amounts to significant scattering.
Notes inventor Nathan Cohen: "The scattering profile matches an empty-space one with good to high fidelity. It’s as if there is nothing there. In particular we see no shadows. Substantial shadowing was present with the control. It is a striking difference and confirmation."
The wideband invisibility cloaking is enabled with the firm’s proprietary fractal metamaterial technology. The firm now uses the technology in several of its products, unrelated to cloaking. Cohen cautioned that the invisibility cloak is a technology demonstrator and not a practical device. "You can’t hide a starship or a battleship in it," he remarked, "but we now have to ask where such cloaks can be useful rather than merely intellectually amusing."
Graphs of the scattering data are available from the firm’s website and are included in a comprehensive article on the invisibility cloak, to be published in 2012.
bflr
Very cool. Ultimately, they’ll perfect it, but it will have to be controlled very tightly. Just imagine these in the hands of criminals or terrorists.
Here’s the pic:
You got me for a minute there! Reading while watching playoffs causes stupidity.
Oh yeah! It’s fabulous! Now we know for sure that cr*p they have been spraying in the sky is full of heavy metals. The Human body was not designed to absorb this junk. More leftist lunatic so called scientists just determined to rip pandora’s box open and spill all of it’s poisonous contents!
Terrific. Kinda like lyme’s disease, invention and denial, another army lab boondoggle.
Sounds like a good paint for stealth bombers and the like.
A whole ‘nother branch of optics might result if they can fool the eye with this too — make an aircraft passing through the sky look like it isn’t there.
Are you in the wrong place? This is talking about a coating for things like aircraft, not some sort of sprayed chaff.
Bird of prey
Great pic! It's like, umm, Obama's transparent administration.
Dude, what kind of thread are you on? Get some rest inside your tinfoil hat.
I realized that afterwards, my apologies for that , but my main point is that we can no longer abide all of these various introductions of heavy metals. Chaff was merely a precursor. This crap all gets into the environment through weather events, manufacturing thereof, disposal thereof etc.
It is still the same type of “experiment” that the not so smart Army Labs came up with in the Cold War that were precursors to lyme’s disease, thirty five years later, folks still can’t get treated for.
Actions have consequences and the Fed is astonishingly shortsighted.
Just keep the taggers with cans of spray paint away. Got one of these on your 6? Release a paint spray with finely divided metal. Bye bye stealth, hello missile.
Thought the same thing!
Correct me cause I’m wrong here, but wouldn’t this apply to the demagnetization for the chrome reverse rebifrads on my dual palatalizing overhead Jackson rods? Far-freaking out…dude! I think I’ll burn another one.
Some years back read refencecs in IEEE literature about fractal antennas. Super wideband and all that fluff. Yet to see real example.
All those articles that showed great Mandelbtot patterns, neglected to show how the thing was terminated.
A nice element conductive shape is great, but you have to ground it or feed it somewhere..................
more like his invisible clothes.
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