OPTICAL%20CAMOUFLAGE%20-%20Invisibility%20Cloak.

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OPTICAL CAMOUFLAGE- Invisibility Cloak.
Ayush Jain EC-1 1507162
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What is Optical Camouflage?
OPTICAL CAMOUFLAGE is a technology which makes
the wearer invisible with respect to surrounding.
Camouflage means to disguise or to blend with the
surroundings. It is the method which allows an
organism or object to remain indistinguishable
from the surrounding environment. by use of
panels or coatings capable of altering their
appearance, colour, luminance and reflective
properties.
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How does it work?
Creating complete optical camouflage would
require a number of tiny cameras and
projectors These are programmed to gather
visual data from different angles and project the
gathered images outwards in large number of
different directions to give the illusion of
invisibility from all angles. A massive amount
of computing power and embedded sensors would be
necessary to continuously project the correct
images in all directions. For this we would
certainly require sophisticated nanotechnology,
as our computers, projectors, and cameras are not
yet miniaturized enough to meet these
conditions.
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What is Invisibility Cloak?
The invisibility cloak renders the human
partially invisible, when he/she slips beneath
the shining, silvery cloak.
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How invisibilty cloak is real?
Optical camouflage requires a complicated
arrangement. First, the person who wants to be
invisible (Person A) wears the cloak. An observer
(Person B) stands before (Person A) at a specific
location. At that location, (Person A) appear to
be partially invisible to (Person B). If (Person
B) were viewing from a slightly different
location, he would simply see (Person A) wearing
a cloak.
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The Invisibility Cloak
The cloak that enables optical camouflage to work
is made from a special material known as
retro-reflective material.
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Principle
Optical camouflage doesn't work by way of magic.
It works by taking advantage of something called
augmented-reality technology. Augmented reality
It merely tries to supplement real world with
additional, helpful content.
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Requirements

• A garment made from highly reflective material
• A video camera
• A computer
• A projector
• A special, half-silvered mirror called a combiner

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The Complete System
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Video Camera
Capturing the background image requires a video
camera, which sits behind the person wearing the
cloak. The video from the camera must be in a
digital format so it can be sent to a computer
for processing.
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Computer
All augmented-reality systems rely on powerful
computers to synthesize graphics and then
superimpose them on a real-world image. For
optical camouflage, the Computer must take the
image from the video camera, calculate the
appropriate perspective to simulate reality to be
projected onto the retro-reflective material.
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Projector
For optical camouflage, the central opening must
be the size of a pinhole. This ensures a larger
depth of field so that the cloak can be located
any distance from the projector.
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Combiner
A special mirror to reflect the projected image
toward the cloak To let light rays bouncing off
the cloak return to the user's eye. This special
mirror is called a beam splitter, or a combiner.
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Real World Applications
AUGMENTED STEREOSCOPIC VISION IN SURGERY
Doctors performing surgery could use optical
camouflage to see through their hands and
instruments to the underlying tissue so making
the complicated surgeries a bit better. COCKPIT
FLOORS Pilots landing a plane could use this
technology to make cockpit floors transparent
with micro reflectors. This would enable them to
see the runway and the landing gear simply by
glancing down. TRANSPARENT REAR HATCH Drivers
backing up cars could have a quick glance
backward through a transparent rear hatch would
make it easy to know when to stop. STEALTH
TECHNOLOGY Stealth means low observable. Its
basic idea is to blend in with the background
and is used mainly for military purpose. Stealth
Technology is used in the construction of mobile
military systems such as aircrafts and ships to
significantly reduce their detection by enemy,
primarily by an enemy RADAR.
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Disadvantages

• Partial Invisibility

• Requires Expensive Equipments.

• The target can only be in a certain field of view

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Conclusion
Although this is having some disadvantages. Optica
l Camouflage is a nice technology. However
further developments are being going on, I
believe this is going to change the entire world.
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Thank you
Optical Camouflage-Invisibility Cloak