Transcript Working of Optical Camouflage Free Powerpoint Templates Page 18

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Making Things Invisible……….
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Introduction To Optical Camouflage
Requirements of Optical Camouflage
Working of Optical Camouflage
Applications of Optical Camouflage
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With recent advances in optics and
computing and advent of flexible
electronic like liquid crystal display can
allow back ground image to be
displayed on the material itself.
 Although more encumbering and
complicated than Harry Potter’s
invisibility.
However it is a
cool piece of technology
with many
interesting applications
 Camouflage is the concealment of
otherwise visible objects by any method or
combination of methods that allows them to
remain unnoticed.
 Optical camouflage is a hypothetical type
of active camouflage .
 It altogether renders invisibility by slipping
beneath the shining, silvery cloth.
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 By projecting background image on to the masked
object, you can observe the masked object just as if it were
virtually transparent.
 The concept is to create the illusion of invisibility by
covering an object with something that projects the scene
directly behind that object.
 Uses RETRO REFLECTIVE PROJECTION
TECHNOLOGY(RPT)
 Three key techniques of RPT
are the followings:
1.
To use an object covered by
retro-reflective material as a
screen
2. Make the projector's iris as
small as possible (by using a
pinhole).
3. To place a projector into a
position optically
conjugated with the observer's eye
by using a halfmirror.
Requirements For Invisibility…
• A Garmet made from highly Reflective
Material (Cloak)
• A Video Camera
• A Computer
• A Projector
• A Special half Silvered mirror
(Combiner)
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1. CLOAK
 The cloak is made from a special
material known as retro-reflective
material creating a SPECULAR
REFLECTION, is in which incident
light rays and reflected light rays form
the exact same angle with the mirror
surface.
 It creates an illusion of invisibility by acting like a screen.
 Covered with thousands of small beads
 They bounce the light rays exactly in the same direction
as that of incident angle.
2. VIDEO CAMERA
 It caputres the background
image.
 The video camera is placed
behind the person wearing the
cloak.
Note: For easier illustration of working we had used these common known images, in real time
optical Camouflage the device size will be smaller than that of actual size like spy cams, tablets
3. COMPUTER
 To capture the image from the video
camera
 It will add some Graphics to the received
video
Note: For easier illustration of working we had used these general images, in real time optical
Camouflage the device size will be smaller than that of actual size like spy cams, tablets
Synthesize
graphics
captured
image(video
camera)
Hardware/software(calculation
of approximate perspective
simulation,transformation)
Superimpose on to
the Real world
Projected (on to the
cloak)
4. PROJECTOR
 It projects the modified image
onto the cloak.
 A projector accomplishes this
task by shining a light beam
through an opening controlled by a
device called an iris diaphragm.
 An iris diaphragm is made of
thin, opaque plates.
 Turning a ring changes the
diameter of
the central opening
Note: For easier illustration of working we had used these common known images, in real time
optical Camouflage the device size will be smaller than that of actual size like spy cams, tablets
5. COMBINER
 The system requires a special
mirror that both :
Reflects the projected image
toward the cloak and
Lets the light rays bouncing off
the cloak return to the user's eye.
 This special mirror is called a
beam splitter, or a combiner.
 It should be properly
positioned in front of user’s eye.
Note: For easier illustration of working we had used these common known images, in real time
optical Camouflage the device size will be smaller than that of actual size like spy cams, tablets
Video
Camera
Computer
Projector
Retro- Reflective
Material
(Cloak)
Combiner
WORKING OF OPTICAL CAMOUFLAGE
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 Optical see-through displays
look like high-tech goggles
providing a display and optics for
each eye.
 Video see-through displays use
video-mixing technology to combine
the images from a head-worn
camera with computer-generated
graphics.
Applications
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Mutual Tele-Existance
Used For Military Purposes
Used For Medical Purpose
Using in Aeroplanes
Using in Cars
Creating Windows for Windowless Rooms
Mutual TeleExistance
Military Applications
Making the Aircrafts and War Vehicles Invisible during the war Time
Military Applications
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Military Applications
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Medical Applications
Doctors performing surgery could use optical camouflage to see through their hands
and instruments to the underlying tissue.
In Aeroplanes
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Pilots landing a plane could use this technology to make cockpit floors transparent.
This would enable them to see the runway and the landing gear simply by glancing
down.
In Cars and Lorries
Drivers backing up cars could benefit one day from optical camouflage. A quick glance
backward through a transparent rear would make it easy to know when to stop.
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Windows for a Windowless Rooms
By Placing the Projector on the wall we can create a movable
window i.e we can place this window where ever we wish
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 Each technology has its own pace of
development.
 This technology is still at development
reasearch work is going on and soon we have
astonishing results.
 It should be used in the right application so that
it can be explored in a better way so it can be
useful for the human life.
ANY QUERIES…