Optical Camouflage

visual disguise ABSTRACT The advancement in experience is making what we may pay off thought of as impossible, probable. Humans may become in in sight as the extra terrestrials which ar considered to be credibly invisible. A new engine room provides a way to this. In this penning a scientific technology that is employ to implement this idea is presented. The visual camouflage technology is one of the famous scientific technologies which helps in the construct of a new type of entomb called the invisible cloak. This is one of the well-favored revolutions created in the area of virtual reality.It is just a concept of reflection of cloudless by the cloak. The psyche who wears this cloak will feel as just what he feels with the ordinary cloaks only the soul will be invisible to the outside environment. This is the main advantage of this cloak. There are some(prenominal) other interest features present in this paper about this cloak. CHAPTER 1 INTRODUCTION Chaitanya g ive of engineering science & engineering scallywag 1 ocular disguise Although optical is a term that technically refers to all forms of light, just about proposed forms of optical camouflage would besides provide invisibility in the visible portion of the spectrum.The research on the concept of invisibility was started in 1977 and was lickually successfully accomplished in 2003. Initially Professor Tachi from the University of Tokyo express that he had first had the idea of developing something to make quarrys invisible in 1977. But the imag e was flat and un earthy. He came up with retro- wistful material which causes the rise up to act as a screen and gives a transparent or invisible effect. Similarly, Duke University is using microwave jibe deflection, making it appear some as if nothing were there at all. If youve imposen the movie Harry ceramicist then you may recognize the idea of an invisibility cloak. CHAPTER 2 ocular CAMOUFLAGE optical camouflage is a hypo thetical type of expeditious camouflage currently only in a very primeval stage of development. The idea is relatively straightforward to create the illusion of invisibility by covering an object with something that projects the look directly rump that Chaitanya form of Engineering & Technology foliate 2 ocular CAMOUFLAGE object. optic camouflage is a kind of active camouflage which completely envelopes the wearer.It displays an hear of the scene on the side opposite the viewer on it, so that the viewer can take care th furious the wearer, rendering the wearer invisible. Although optical is a term that technically refers to all forms of light, most proposed forms of optical camouflage would only provide invisibility in the visible portion of the spectrum. Prototype examples and proposed designs of optical camouflage devices range back to the late eighties at least, and the concept began to appear in fiction in the late nineties. CHAPTER 2. 1 Components of the Optical Camo uflageOptical camouflage doesnt cream by way of magic. It whole kit and boodle by taking advantage of something called augmented-reality technology. Augmented-reality systems add computergenerated information to a users sensory(a) perceptions. Most augmented-reality systems request that users look by dint of a special backwash apparatus to see a real-world scene enhanced with synthesized graphics. They to a fault require a powerful computer. Optical camouflage requires these things, as well, but it also requires several other components. ? A garment do from steeply reflective material A video camera ? A computer ? A projector ? A special, half-silvered mirror called a combiner which is the viewing screen CHAPTER 2. 2 The screen Chaitanya appoint of Engineering & Technology Page 3 visual CAMOUFLAGE It is made up of retro-reflective material. It has an observer that receives more of the reflected light and therefore sees a opalineer reflection. It can be seen far away and outside in bright sunlight. CHAPTER 2. 3 Other components The camera captures the digital video behind the person with the cloak. The computer synthesizes the graphics and superimposes them on a real-world image. The projector shines a light beam through an hypothesis controlled by a device called an iris diaphragm. The combiner (special mirror) is used to both reflect the projected image toward the cloak and let light rays spirited off the cloak to return to the viewers eye. Chaitanya add of Engineering & Technology Page 4 opthalmic CAMOUFLAGE CHAPTER 3 CONCEPT OF INVISIBILITY CLOAK Chaitanya Institute of Engineering & Technology Page 5 OPTICAL CAMOUFLAGE 1.The cloak that enables optical camouflage to work is made from a special material know as retro-reflective material. 2. A retro-reflective material is cover with thousands and thousands of modest beads. When light strikes one of these beads, the light rays restrict back take aimly in the same direction from which they came. 3. To understand why this is unique, look at how light reflects off of other types of surfaces. A rough surface creates a diffused reflection because the incident (incoming) light rays vex scattered in many different directions.A perfectly smooth surface, desire that of a mirror, creates what is known as a specular reflection a reflection in which incident light rays and reflected light rays form the exact same angle with the mirror surface. In retroreflection, the glass beads act like prisms, bending the light rays by a process known as refraction. This causes the reflected light rays to travel back along the same trend as the incident light rays. The result An observer situated at the light source receives more of the reflected light and therefore sees a brighter reflection.Chaitanya Institute of Engineering & Technology Page 6 OPTICAL CAMOUFLAGE CHAPTER 4 WORKING Chaitanya Institute of Engineering & Technology Page 7 OPTICAL CAMOUFLAGE Once a person puts on the cloak made with the retro-reflective material, heres the sequence of events A digital video camera captures the scene behind the person wearing the cloak. The computer processes the captured image and makes the calculations necessary to adjust the hitherto image or video so it will look realistic when it is projected. The projector receives the enhanced image from the computer and shines the image through a pinhole-sized opening onto the combiner. The silvered half of the mirror, which is completely reflective, bounces the projected image toward the person wearing the cloak. Chaitanya Institute of Engineering & Technology Page 8 OPTICAL CAMOUFLAGE The cloak acts like a movie screen, reflecting light directly back to the source, which in this case is the mirror. Light rays bouncing off of the cloak pass through the transparent part of the mirror and fall on the users eyes.Remember that the light rays bouncing off of the cloak contain the image of the scene that exists behind the pers on wearing the cloak. The person wearing the cloak appears invisible because the background scene is being displayed onto the retro-reflective material. At the same time, light rays from the rest of the world are allowed reach the users eyes, making it seem as if an invisible person exists in an otherwise normal-looking world. CHAPTER 4. 1 Key Challenges Practicality smaller computer integrated substitute of projector combiner. Purchase patent or license. High costs. Very small cameras and projectors CHAPTER 5 MUTUAL TELEXISTENCE Chaitanya Institute of Engineering & Technology Page 9 OPTICAL CAMOUFLAGE CHAPTER 5. 1 How mutual telexistence works Chaitanya Institute of Engineering & Technology Page 10 OPTICAL CAMOUFLAGE Human user A is at one location while his telexistence robot A is at another(prenominal) location with human user B. Human user B is at one location while his telexistence robot B is at another location with human user A. Both telexistence robots are covered in retro-reflective material so that they act like screens. With video cameras and projectors at each location, the images of the two human users are projected onto their respective robots in the remote locations. This gives each human the perception that he is working with another human instead of a robot. Right now, mutual telexistence is science fiction, but it wont be for long as scientists continue to push the boundaries of the technology. CHAPTER 6 sure WORLD APPLICATIONS Chaitanya Institute of Engineering & Technology Page 11 OPTICAL CAMOUFLAGE Doctors performing surgery could use optical camouflage to see through their hands and instruments to the underlying tissue. Providing a view of the outside in windowless rooms is one of the more fanciful applications of the technology, but one that king improve the psychological well-being of people in such environments. Pilots arrive 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. Drivers backing up cars could benefit one day from optical camouflage. A quick peek backward through a transparent rear hatch or tailgate would make it easy to know when to stop.CHAPTER 7 OPTICAL CAMOUFLAGE SEEN IN ? Ghost in the Shell. ? 2000 video game Deus Ex. Chaitanya Institute of Engineering & Technology Page 12 OPTICAL CAMOUFLAGE ? 2002 James vex movie Die Another Day ? Metal Gear consentient and Halo video game series. ? The video game Phantom Crash. ? The vulture movie. CHAPTER 8 ADVANTAGES & DISADVANTAGES ADVANTAGES Chaitanya Institute of Engineering & Technology Page 13 OPTICAL CAMOUFLAGE ? Optical Camouflage can be used on surgical globes or equipments so they dont block sawboness view during delicate operations. ?In aviation, cockpit floors could become invisible to assist pilots during landing. DISADVANTAGES ? The worn point of this technique is that the observer needs to look through a half-mirror . ? The current system needs a half-mirror and projectors, which were fixed on the ground. CHAPTER 9 CONCLUSION Now all of us throw away had a small tour of the interesting world of optical camouflage. A lot of interesting thing have been done and already we have seen that anyone can be almost invisible Chaitanya Institute of Engineering & Technology Page 14 OPTICAL CAMOUFLAGE ith this technology. Though we are still facing challenges with practicality, licensing and high costs the future promises us a lot more. To make an object literally vanish before a persons eyes, a cloak would have to simultaneously interact with all of the wavelengths, or colours, that make up light. That technology would require much more intricate and tiny meta-material structures, which scientists have barely to devise. Research work is going on and soon we will have even more astonishing results. Chaitanya Institute of Engineering & Technology Page 15