This document discusses two ways to create invisibility - manually and scientifically. The manual way uses cameras and projectors to display background scenes onto retro-reflective cloaks to make objects appear invisible. The scientific way uses metamaterials composed of nano-structured metals that can deflect microwaves and light around an object. Recent studies have created cloaks that can cloak wider spectra at smaller nanoscale sizes. Scientists continue working to develop larger scale invisibility cloaks using transformation optics and other techniques.

1. MANUALLY SCIENTIFICALLY

2. Alinsonorin, Aldwin Jake
 Avelino, Nichole Jonh
Tabar, Charmaine Marie
 Torres, Cates

3. Trazo, Arman Ann
 Unabia, Sheila Mae
Villasencio, Vina

4. Made possible

5.  Ways to create
-manual way
-scientific way
 Discovery
-recent
-scientist’s insights
 Sources

6. Manual Way
(just to mean literally “invisible”)

7. Just to mean literally “invisible”

8. 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.

10. 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.

11. 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.

12. 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.

13. 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.

14. Scientific way
(deflecting microwaves)

15. Deflecting microwaves

16. 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

17. 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.

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

19. to develop possible future invisibility

20. 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

21.  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

22. Recent studies

23. 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.

24. 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.

25. 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.

26. Scientist’s insights

27. “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)

28. “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)

29. One of the scientist
concentrating on making an
invisibility cloak

30. "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)

31. “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 )

32. "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)

33. One of the scientist
concentrating on making an
invisibility cloak

34.  AUGMENTED STEREOSCOPIC VISION
IN SURGERY
COCKPIT FLOORS
TRANSPARENT REAR HATCH
STEALTH TECHNOLOGY

36. 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.

37. http://news.discovery.com/tech/invisibility-
cloak-3d.html
http://science.howstuffworks.com/invisibilit
y-cloak.htm
http://www.washingtonpost.com/wp-
dyn/content/article/2008/02/19/AR2008021
902617.html

38. http://www.sciencedaily.com/releases/2009
/05/090501154143.htm
http://www.imperial.ac.uk/centenary/flash/ti
meline/images/people/small/pendry.jpg