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Topic: Invisibility cloak


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In the News (Tue 23 Jul 19)

  
  First Demonstration of a Working Invisibility Cloak
Cloaks that render objects essentially invisible to microwaves could have a variety of wireless communications or radar applications, according to the researchers.
In the case of the new cloak, that structure consists of copper rings and wires patterned onto sheets of fiberglass composite that are traditionally used in computer circuit boards.
To assess the cloak's performance, the researchers aimed a microwave beam at a cloak situated between two metal plates inside a test chamber, and used a specialized detecting apparatus to measure the electromagnetic fields that developed both inside and outside the cloak.
dukenews.duke.edu /2006/10/cloakdemo.html   (1129 words)

  
  Cloak article - Cloak garment clothing overcoat hood stereotypical witches wizards - What-Means.com   (Site not responding. Last check: 2007-11-02)
A cloak is a type of loose garment which is worn over indoor clothing and serves the same purpose as an overcoat – it protects the wearer from the cold, rain or wind for example, or it may form part of a fashionable outfit (e.g.
Cloaks generally fasten at the neck, and vary in length, although mid-calf is common.
A cloak is part of the stereotypical outfit associated with witches and wizards.
www.what-means.com /encyclopedia/Cloak   (134 words)

  
 Invisibility - Wikipedia, the free encyclopedia
Invisibility refers to the state of an object which cannot be seen.
Where magical invisibility is concerned, the issue may arise of whether or not the clothing and items carried by the invisible wearer/carrier are also rendered invisible.
In comic books, there are superheroes such as the Invisible Woman (who can bend light around herself without distortion) that have the power to become invisible at will as well as wizards like Doctor Strange who have invisibility spells in their possession.
en.wikipedia.org /wiki/Invisible   (1603 words)

  
 Wired 11.08: The Super Power IssueBeing Invisible
Tachi's cloak - a shiny raincoat that serves as a movie screen, showing imagery from a video camera positioned behind the wearer - is more gimmick than practical prototype.
Invisibility isn't a simple matter of sensors that read the light beams on one side of an object and LEDs or LCDs that reproduce those beams on the other.
If we want the cloak to be able to pass in front of the sun without looking hazy or casting shadows, we'll need to make it equally bright.
www.wired.com /wired/archive/11.08/pwr_invisible.html   (1095 words)

  
 Scientists working on 'invisibility cloak':- - Science News - Webindia123.com
London, March 3 : A cloaking device that makes objects invisible is being developed by researchers - bringing the magic of Harry Potter into the world of scientific fact.
The cloak could have widespread use in the military as it would be more effective than current stealth technology, reported Scottish daily Scotsman.
Other types of invisibility cloaks have been developed before, but these mostly use the 'chameleon principle' - colouring objects to match their background, enabling them to blend in and become camouflaged.
news.webindia123.com /news/showdetails.asp?id=70490&cat=Science   (510 words)

  
 Invisibility cloak is latest amazing ‘metamaterial’   (Site not responding. Last check: 2007-11-02)
The ‘invisibility cloak’ consists of a series of concentric rings of a fibreglass-based composite upon which have been imprinted numerous U-shaped copper elements of millimetre dimensions in a precise geometric formation.
As microwave radiation, of wavelength around 3 cm, strikes the cloak, the beams are diverted around the object and meet up at the other side — similar to the way that water flows around a boulder in a river.
The effect is achieved because of a subtle gradient in the electromagnetic properties of the cloak.
www.rsc.org /chemistryworld/News/2006/October/19100602.asp   (442 words)

  
 Scientists shed new light on invisibility - The Boston Globe
Invisibility, they argue, is a matter of diverting light around an object so all the light continues on its way instead of reflecting off the object.
One says the cloaking device would be a thick sphere of the transparent material, with a small hollow at its center for hiding something, according to David Schurig, a physicist at Duke University who was one of three authors of that report.
Not to mention the fact that the scientists' cloaking device would be a solid object instead of a supple cloak that can be folded up and hidden in a pocket.
www.boston.com /news/globe/health_science/articles/2006/05/29/scientists_shed_new_light_on_invisibility   (826 words)

  
 Invisibility cloak unveiled | COSMOS magazine
The cloak works by deflecting microwave radiation around an object, making it appear to an receiving instruments as though there were nothing obstructing it at all, rendering it, effectively invisible.
In the invisibility cloak, that structure consists of copper rings and wires patterned onto sheets of fibreglass composite that are traditionally used in computer circuit boards.
To assess the cloak's performance, the researchers directed a microwave beam at the cloak, which was situated between two metal plates inside a test chamber.
www.cosmosmagazine.com /node/780   (503 words)

  
 Scientists ponder invisibility cloak - Boston.com
Imagine an invisibility cloak that works just like the one Harry Potter inherited from his father.
A cloak made of those materials, with a structure designed down to the submicroscopic scale, would neither reflect light nor cast a shadow.
Such a cloak does not exist, but early versions that could mask microwaves and other forms of electromagnetic radiation could be as close as 18 months away, Pendry said.
www.boston.com /news/education/higher/articles/2006/05/25/scientists_ponder_invisibility_cloak   (534 words)

  
 mobile9 Forum -> New Technology- An Invisibility Cloak?
The inventor of an "invisibility" cloak has said that his next project will be to develop the technology to allow people to see through walls.
Susumu Tachi, who showed off the cloak at an exhibition in San Francisco earlier this month, said he was hopeful of providing a way to provide a view of the outside in windowless rooms.
The key development of the cloak, however, was the development of a new material called retro-reflectum.
www.mobile9.com /invboard/index.php?showtopic=2937   (554 words)

  
 LiveScience.com - Scientists Create Cloak of Partial Invisibility
A three-dimensional invisibility cloak would hide an object completely.The microwave cloak is also slightly reflective and casts a partial shadow.
Cloaks that deflect radio waves could render an object invisible to radar or improve cell phone receptions by rerouting signals around obstructions.
The cloak is made of copper rings and wires patterned onto sheets of fiberglass composite.
www.livescience.com /technology/061019_invisibility_cloak.html   (679 words)

  
 Scientific Frontline / Scientists create first working invisibility cloak
The cloak was built using specially-manufactured 'metamaterials' which 'grab' light heading towards the cloak and make it flow smoothly around the cloak instead of striking it.
Sir John and his collaborators at Duke are concentrating on perfecting their cloaking technology for microwaves, and are hoping to develop a three-dimensional cloak for invisibility to microwaves.
The cloak is thought to be one of the most complex metamaterial structures ever made, as it has a unique circular geometry and it's electromagnetic properties vary across its surface.
www.sflorg.com /sciencenews/scn101906_02.html   (421 words)

  
 Cloaking and Invisibility: Fact and Fiction
Invisibility is a common theme in tales from science fiction, fantasy, fables and mythology.
Invisibility of any sort will be a very difficult achievement, one that will involve much more complication than we have even begun to delve into here.
The physics of cloaking, as we have outlined, is sound, and cloaks may be fabricated using the artificial materials that have been introduced over the past several years.
www.ee.duke.edu /~drsmith/cloaking.html   (3187 words)

  
 Physicists Posit Theoretical Blueprint For Harry Potter-Like 'Invisibility Cloak' -- Research
Three physicists say they have developed the blueprint for an "invisibility cloak," or fabric, to make physical objects appear as though they have disappeared when they are covered.
The key to making the cloak work comes from an exotic artificial composite called "metamaterials," which could have numerous uses, from defense applications to wireless communications, according to David R. Smith, professor of electrical and computer engineering at Duke's Pratt School.
The cloak works on the principal of light as an electromagnetic wave, with a longer wavelength than X-rays and ultraviolet and shorter wavelength than infrared, microwaves and radio waves.
www.informationweek.com /research/showArticle.jhtml?articleID=188500465   (506 words)

  
 Invisibility cloak could become a reality - USATODAY.com   (Site not responding. Last check: 2007-11-02)
The work is very preliminary, but it could herald an era of effectively invisible "cloaked" devices, says study senior author David Smith of Duke University in Durham, N.C. A prototype so far only hides objects from microwaves, not from visible light, so the human eye can still see the objects.
To test the cloak, researchers first fired microwaves at a copper cylinder and recorded the electronic shadow it cast.
The theory behind the invisibility cloak device is only 5 months old.
www.usatoday.com /tech/science/discoveries/2006-10-19-invisibility-cloak_x.htm   (515 words)

  
 First Invisibility Cloak Tested Successfully, Scientists Say   (Site not responding. Last check: 2007-11-02)
Summary Researchers announced today that they've built the world's first invisibility cloak, although the fine print may disappoint science-fiction fans.
Researchers announced today that they've built the world's first invisibility cloak, although the fine print may disappoint science-fiction fans.
Still, the experiment proves that a theoretical blueprint for building invisibility cloaks unveiled by the same team just five months ago works.
news.nationalgeographic.com /news/2006/10/061019-invisible-cloak.html   (332 words)

  
 HPL: Devices and Items: C   (Site not responding. Last check: 2007-11-02)
An Invisibility Cloak is a cloak of silvery grey material that, when worn, makes the covered parts of the wearer invisible.
Invisibility Cloaks are woven from the hair of the Demiguise (FB).
Harry's Invisibility Cloak is either quite large, big enough to cover several kids and a dragon in a wooden packing crate, or more likely it magically expands to cover what it needs to cover, within limits (PS14).
www.hp-lexicon.org /magic/devices/devices_a-g.html   (1352 words)

  
 Here’s how to make an invisibility cloak - Science - MSNBC.com
Researchers say they are rapidly closing in on new types of materials that can throw a cloak of invisibility around objects, fulfilling a fantasy that is as old as ancient myths and as young as "Star Trek" and the Harry Potter novels.
For a total invisibility effect, the waves passing closest to the cloaked object would have to be bent in such a way that they would appear to exceed relativity's light speed limit.
That's a tall order for optical invisibility, because the structures would have to be on the scale of nanometers, or billionths of a meter.
www.msnbc.msn.com /id/12961080   (1149 words)

  
 OSXFAQ :: View topic - Dr. Mac and the Cloak of Invisibility
First, Mac OS has always had the ability to "hide" files and folders by making them "invisible." In the old days, you set a "flag" for it in ResEdit (or other utility); in Mac OS X, any file or folder whose name begins with a period is rendered invisible.
One of the uses for this cloak of invisibility is to hide the inner plumbing of OS X from your grubby little fingers.
Invisible files can be particularly useful for hiding files and folders on your Mac from prying eyes.
forums.osxfaq.com /viewtopic.php?t=2320   (647 words)

  
 Invisibility the natural art of concealing ones light   (Site not responding. Last check: 2007-11-02)
The nature of invisibility is the ability of blocking out light and it's many spectrums, like a cloud blocking out the sunlight of the sun on a cloudy day.
Physical Invisibility is a little different to visual in visibility because with physical visibility we use Kundalini energy from the seven major centres in the chakra system to form the fl photonic cloud of invisibility this is done by projecting energy from the seven centres into the auric field and forming the fl photonic cloud.
Now that we have created the photonic cloak of invisibility it time to see how you went open your eyes and focus on the mirror in front of you see your reflection and as you watch focus your mind on the photonic clouds and feel them changing from their natural golden colour to fl.
home.xtra.co.nz /hosts/Wingmakers/Invisibility.html   (1131 words)

  
 Ginny Knows? - The Sugar Quill   (Site not responding. Last check: 2007-11-02)
In that passage cloak is in lowercase, which means that it did not mean the Invisibility Cloak.
It still could have been a regular school cloak but I think in Ginny's thoroughness of "ransacking" Harry's room, it's likely she would have come across the invisibility cloak at some point unless Harry had found a special hiding place for it.
Well, in my UK edition, Invisibility Cloak is capitalized, but the cloak in that sentence isn't, so I'd say it was probably Harry's regular cloak in that instance.
www.sugarquill.net /forum/index.php?showtopic=4629   (914 words)

  
 Cloak of invisibility: Fact or fiction? - Innovation - MSNBC.com
Cloaking simply passes the radar or other waves around the object as if it weren’t there, like water flowing around a smooth rock in a stream.
Nonetheless, the cloaking of a cylinder from microwaves comes just five months after Schurig and colleagues published their theory that it should be possible.
Since we do not have a perfect cloak at this point, there is some reflection and some shadow, meaning that the background would still be visible just darkened somewhat.
www.msnbc.msn.com /id/15329396   (849 words)

  
 Theoretical Blueprint for Invisibility Cloak Reported
Such a cloak could hide any object so well that observers would be totally unaware of its presence, according to the researchers.
In principle, their invisibility cloak could be realized with exotic artificial composite materials called "metamaterials," they said.
Although the theoretical cloak now reported has yet to be created, the Duke researchers are on their way to producing metamaterials with suitable properties, Smith said.
dukenews.duke.edu /2006/05/cloaking.html   (806 words)

  
 Compare Prices and Read Reviews on Mattel Harry Potter and the Sorcerer's Stone: Invisibility Cloak Harry Action Figure ...
Invisible Harry supports a nice 3D package with attractive art on the card reminiscent of the film and movie, and a bubble protecting the figure with Hogwart's imagery surrounding.
The spiffing invisibility cloak fits nicely on Harry's shoulders and covers his body, and is removable to admire his detail.
Though the lack of articulation is not a big problem overall because of the invisibility cloak, which is created for only one pose and that pose is fine - after all, the second you take the cloak off him, you can see him again and thus you switch figures with a more visible Harry.
www.epinions.com /content_67732278916   (753 words)

  
 BBC NEWS | Technology | Inventor plans 'invisible walls'
The inventor of an "invisibility" cloak has said that his next project will be to develop the technology to allow people to see through walls.
Susumu Tachi, who showed off the cloak at an exhibition in San Francisco earlier this month, said he was hopeful of providing a way to provide a view of the outside in windowless rooms.
The key development of the cloak, however, was the development of a new material called retro-reflectum.
news.bbc.co.uk /2/hi/technology/3791795.stm   (374 words)

  
 Vanishing Actor: Physicists unveil first invisibility cloak: Science News Online, Oct. 21, 2006
Microwaves bent by the concentric walls of this 1-centimeter-tall invisibility device circumvent the center area and emerge on their original paths as if nothing had been in the way.
The new cloak's developers assembled the cloak from 10 narrow bands of fiberglass on which they had imprinted thousands of copper loops.
The first demonstration of 3-D cloaking in microwaves is still at least a year or two away, estimates Duke physicist and team leader David R. Smith.
www.sciencenews.org /articles/20061021/fob6.asp   (673 words)

  
 Alice Hill’s Real Tech News - Independent Tech » Invisibility Cloak
If this were genuine, when the guy moves his arm in front of his head we would see through the sleeve and to his head, since the coat supposedly simply gathers the light from one side and outputs it on the other.
Basically, the article sumary is dead wrong, the cloak itself is not a display and has never been claimed to be, except by the guy who wrote this summary.
This is clearly pretty fake and while there is a cloak that does indeed have a display, it’s current state of development is nowhere near what is artificially shown in the video.
www.realtechnews.com /posts/1860   (2541 words)

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