All About: Invisibility Cloak

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All About Invisibility Cloak

• Manually

• Scientifically

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Researchers

• Alinsonorin, Aldwin Jake
• Avelino, Nichole Jonh
• Tabar, Charmaine Marie
• Torres, Cates

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Researchers

• Trazo, Arman Ann
• Unabia, Sheila Mae
• Villasencio, Vina

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Invisibility Cloak

• Made possible

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Invisibility Cloak

• Ways to create
• -manual way
• -scientific way
• Discovery
• -recent
• -scientists insights
• Sources

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Way to create Invisibility Cloak

• Manual Way
• (just to mean literally invisible)

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Manual Way

• Just to mean literally invisible

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Manual Way

• A digital video camera captures the scene behind
  the person wearing the cloak.
• The computer processes the captured image or
  video so it will look realistic when it is
  projected.

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Raincoat
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Manual Way

• The projector receives the enhanced image from
  the computer and shines it through the opening
  onto the combiner.
• The silvered half of the mirror, bounces the
  projected image toward the person wearing the
  cloak.

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Manual Way

• The cloak acts like a movie screen, reflecting
  light directly back to the source.
• Light rays bouncing off the cloak pass through
  the transparent part of the mirror and fall on
  the user's eyes.

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Manual Way

• The person wearing the cloak appears invisible
  because the background scene is being displayed
  onto the retro-reflective material.
• It is connected with the idea of OPTICAL
  COMOUFLAGE.

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Optical Comouflage

• It means to blend with the surroundings.
• It is the method which allows an organism or
  object to remain indiscernible from the
  surrounding environment.
• It would only provide invisibility in the visible
  portion of the spectrum.

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Way to create Invisibility Cloak

• Scientific way
• (deflecting microwaves)

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Scientific Way

• Deflecting microwaves

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Scientific way

• By the use of metamaterials
• Cloak made up of individual pieces of fiber glass
  arranged in parallel rows.
• These hollow fibers are motels of photons light
  checks in, but it never checks out

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Scientific Way

• The arrangement of it enables the cloak to
  deflect or bend the light making it appear as
  nothing.
• This is all about manipulating light.
• This is known as transformation optics.

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Transformation Optics

• A phenomenon that compels some wavelengths of
  light to flow around an objects like water around
  a stone.

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Metamaterials

• to develop possible future invisibility

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Metamaterials

• It can deflect microwaves around a
  three-dimensional object
• It contains bits of metal or other substances
• Embedded in precise patterns
• It can make the light bend in an opposite
  direction from normal paths

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Metamaterials

• A manmade composites engineered on a nano scale
  with properties entirely different to anything
  found in nature.
• Artificially engineered structures with optical
  properties that bend light in unnatural ways

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Discovery

• Recent studies

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Recent Discovery

• As of year 2006, the cloak is now made of more
  than 10,000 individual pieces of fiberglass.
• This new device can cloak much wider spectrum of
  waves and will scale far more easily to infrared
  and visible light.

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Recent Discovery

• For now the vanishing act takes place on a
  nanoscale, measured in billionths of a meter.
• Scientists have created a paper-thin material
  that absorbs 99.995 percent of the light that
  hits it.

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Recent Discovery

• The invisibility cloak was minute, measuring 100
  microns by 30 microns -- one micron being
  one-thousandth of a millimeter -- and the bump it
  hid was 10 times smaller.

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Discovery

• Scientists insights

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Scientists Insights

• Cloaking is just the tip of the iceberg, with
  transformation optics you can do many other
  tricks.
• -Vladimir Shalaev-
• (professor of electrical and computer engineering
  at Purdue University and an expert in the
  fledging field)

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Scientists Insights

• There are a lot of materials that are very
  absorbing of light so that once the light gets
  in, very little is reflected. That is not the big
  issue. The big issue is persuading the light to
  go in the first place.
• 
  -John Pendry-
• (Physics Professor at Imperial
  College London)

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Sir John Pendry

• One of the scientist concentrating on making an
  invisibility cloak

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Scientists Insights

• "What you want to do is to surround yourself with
  a transparent material that is not only
  transparent but bends the light around you.
• -Doctor Ulf Leonhardt-
• (Physicist at Scotland's St.
  Andrews University)

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Scientists Insights

• It would be possible to make invisibility cloak
  on a large scale but technically, it's totally
  impossible with the knowledge we have now."
• -Nicholas Stenger-
• (one of the scientists from Karlsruhe
  Institute of Technology in Germany )

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Scientists Insights

• "The cloak made of metamaterial reduces both an
  object's reflection and its shadow, either of
  which would enable its detection.
• -David R. Smith-
• (Augustine Scholar and professor of
  electrical and computer engineering at Duke)

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David R. Smith

• One of the scientist concentrating on making an
  invisibility cloak

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Applications(optical comouflage)

• AUGMENTED STEREOSCOPIC VISION IN SURGERY
• COCKPIT FLOORS
• TRANSPARENT REAR HATCH
• STEALTH TECHNOLOGY

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Latest Invention(optical comouflage)
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Conclusion(Optical comouflage)

• A lot of interesting thing have been done and
  already we have seen that anyone can be almost
  invisible with this technology.
• Research work is going on and soon we will have
  even more astonishing results.

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Sources

• http//news.discovery.com/tech/invisibility-cloak-
  3d.html
• http//science.howstuffworks.com/invisibility-cloa
  k.htm
• http//www.washingtonpost.com/wp-dyn/content/artic
  le/2008/02/19/AR2008021902617.html

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Sources

• http//www.sciencedaily.com/releases/2009/05/09050
  1154143.htm
• http//www.imperial.ac.uk/centenary/flash/timeline
  /images/people/small/pendry.jpg