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Optical Camouflage

Optical Camouflage. Presented by , PRAVIN. M R 7 45. This is what it really does…. What is Optical Camouflage ??. It is developed by three scientists at the university of Tokyo. Camouflage means to blend with the surroundings.

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Optical Camouflage

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  1. Optical Camouflage Presented by, PRAVIN. M R745

  2. This is what it really does… - Optical Camouflage -

  3. What is Optical Camouflage?? • It is developed by three scientists at the university of Tokyo. • Camouflage means to blend with the surroundings. • Optical Camouflage is a kind of camouflage in which, one wears a cloth which projects the background so that he appears somehow invisible. • It provides invisibility only in the visible portion of the spectrum. - Optical Camouflage -

  4. Retro-reflective Material • The cloak that enables, optical Camouflage to work is made from a special material known as retro-reflective material. • Retro-reflective material is covered with thousands of small beads. • Whenlight rays strike any of these beads, they are reflected back exactly in the same direction from which they came. - Optical Camouflage -

  5. Light Surface Reflectivity - Optical Camouflage -

  6. Retro-reflectivity • In retro reflection the glass beads act like prism, bending the light rays by a process known as refraction. • An observer situated at the light source receives more of the reflected light and hence a brighter reflection. - Optical Camouflage -

  7. Principle of Optical Camouflage • Optical camouflage works by taking advantage of something called augmented-reality technology. • Augmented reality system’s add computer generated information to a user’s sensory perceptions. • Augmented reality system’s are not the same as virtual reality system’s. • Augmented reality system’s require that the users view through a special viewing apparatus. - Optical Camouflage -

  8. REQUIREMENTS • A garment made from retro-reflective material. • A video camera. • A computer. • A projector. • A special half silvered mirror called a combiner. - Optical Camouflage -

  9. Combiner: • It is also called beam-splitter. • It reflects the projected image towards cloak. • It lets light rays bouncing of the cloak to the user’s eye. • Allows the user to perceive both image enhanced by computer and surrounding light. • Both computer generated image and real world scene must be fully integrated. - Optical Camouflage -

  10. The Complete System - Optical Camouflage -

  11. How does it work?? • The person who wants to be invisible wears the cloak made of retro-reflective material. • A digital video camera captures the scene behind the person wearing the cloak. • The computer processes the captured image. • The projector receives the enhanced image from the computer and shines the image through a pin-hole sized opening onto the combiner. contd. . . - Optical Camouflage -

  12. How does it work?? • The silver half of the mirror which is completely reflective, bounces the projected image towards the person wearing the cloak. • The cloak reflects light directly back to the mirror. • Light rays bouncing off of the cloak pass through the transparent part of the mirror and falls on the user’s eye. • Hence, the person wearing the cloak appears partially invisible. - Optical Camouflage -

  13. Real World Applications • Pilots landing a plane could use this technology to make the cockpit floors transparent. • This enables them to see the runway simply by glancing down. Contd. . . - Optical Camouflage -

  14. Real World Applications • Drivers backing up cars could benefit from optical camouflage. • A quick glance backward through a transparent rear would make it easy to know when to stop. Contd. . . - Optical Camouflage -

  15. Real World Applications • Doctor performing surgery could see through their hands and instruments to the underlying tissues. • Providing a view of the outside in a windowless room. • Mutual Telexistence. - Optical Camouflage -

  16. Mutual telexistence • Working and perceiving with the feeling that you are in several places at once. • Real-time video of separated individuals is projected onto surrogate robotic participants. • This is done via sophisticated communication technology. - Optical Camouflage -

  17. Diagram of Mutual Telexistence - Optical Camouflage -

  18. Where have you seen Optical Camouflage in fiction?? • James Bond film Die Another Day. • Arnold Schwarzenegger film Predator. • Doom video game series. • Metal gear Solid video game series. • Halo video game series. • In Japanese animation series Ghost in the shell. - Optical Camouflage -

  19. Future Outlook • It requires suit covered in tiny cameras and projectors. • It should be programmed to gather visual data from different angles and project them in equally large number of directions. • It would require a massive amount of computing power and embedded sensors. • Sophisticated nanotechnology will be required. - Optical Camouflage -

  20. Drawbacks • Large amount of external hardware required. • Only partial invisibility is achieved. • Target can only be in a certain point of view. • Observer need to look through a combiner. • Current system needs half mirror and projector, which are fixed on the ground. - Optical Camouflage -

  21. Conclusion • Now all of us have had a small tour of the interesting world of Optical camouflage. • Optical Camouflage is a technology which is currently in a very primitive stage of development and hence have many drawbacks. • Research work is going on and soon we will have even more astonishing results. • This technology is believed to have a significant role in the future world. . . - Optical Camouflage -

  22. THANK YOU. . . - Optical Camouflage -

  23. ANY QUERIES? - Optical Camouflage -

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