Holographic projections vaibhavp

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A glimpse of Holographic Projection Technology and its impact in fields of advertising, health, technology and so on.

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Holographic projections vaibhavp

  1. 1. 1. 2. 3. 4. 5. Understanding Holography and holograms. Making a basic hologram 3D Holographic Projections Importance of Lasers Role of Computer engineers in Holography 6. Computer Generated Holography 7. Transmission of Holographic projections in CGH 8. Applications of Holography 9. A glimpse at the future of holographic projections 10. Conclusion
  2. 2. Holography (from the Greek, whole + write) is the science of producing holograms. Holography is the method we use to record patterns of light. These patterns are reproduced as a three dimensional image called a holographic projection. Hungarian physicist Dennis Gabor invented the hologram in 1947. Today’s new technology provides some outstanding advantages to not only everyday consumers but also large business corporations and governments.
  3. 3. A hologram is a recording in a two- or three-dimensional medium of the interference pattern formed when a point source of light (the reference beam) of fixed wavelength encounters light of the same fixed wavelength arriving from an object (the object beam). When the hologram is illuminated by the reference beam alone, the diffraction pattern recreates the wave fronts of light from the original object. Thus, the viewer sees an image indistinguishable from the original object.
  4. 4. A holographic projector, also known as holoprojector uses holographic technology to project large-scale, high-resolution images, at different focal distances, from a relatively small-scale projection device With many of the latest big budget cinema releases being available in 3D, and everyone talking about the 3D future of television, many eyes are starting to focus on 3D hologram projections without the glasses!
  5. 5. To make a basic hologram, all you need is: 1.A laser (Generally Helium-Neon) 2. Lenses 3.A beam splitter 4.Mirror 5.A holographic film 6.The object whose hologram is being generated.
  6. 6. The same theory as mentioned above is used in the projector shown below. When we press the ‘ON’ button the shutter in front of the laser opens and the object stored in it is projected.
  7. 7.   Lasers produce monochromatic light -- it has one wavelength and one color. Because of the need for coherent interference between the reference and object beams
  8. 8. This works just like touch screen mechanisms that we learnt in our Computer Graphics in the 4th semester. The point at which the pattern is disturbed is noted by the processor (As this feature is available only in Computer generated holograms) and the programmed action is taken. As in case of the globe shown previously, it is supposed to rotate when interfered.
  9. 9. You can describe all of the interactions between the object and reference beams, as well as the shapes of the interference fringes, using mathematical equations. This makes it possible to program a computer to print a pattern onto a holographic plate, creating a hologram of an object that doesn’t actually exist.
  10. 10. WITH THESE 2 SENTENCES, WE HAVE EVERYTHING TO DO WITH HOLOGRAPHY You can describe all of the interactions between the object and reference beams, as well as the shapes of the interference fringes, using mathematical equations. This makes it possible to program a computer to print a pattern onto a holographic plate, creating a hologram of an object that doesn’t actually exist.
  11. 11. The ‘if’ and ‘then’ magic: If a hologram is a pattern of light that creates an illusion by use of a holographic frames, then then these patterns can be recorded and stored in a database using an image processing utility software. If it can be stored in a Computer, then it means it can be converted to a digital format. If it can be converted to a digital format, then it can be transmitted via a suitable medium.
  12. 12. If it can be transmitted, then it can also be regenerated on other end using a DAC or similar modules. If it can be processed like this, then it can also be modified or programmed by use of microprocessors and programming languages. If this is possible, then making holograms for required purposes will be as simple as drawing a picture in paint and sending it to a receiver will be as simple as sending an email. If it can be made this flexible using Computers, then we can say that in the near future computers will be the backbone of Holography in the near future! Now we sugar coat it and call it : ‘COMPUTER GENERATED HOLOGRAPHY’
  13. 13. A combo of 1.Holographic projections 2.Augmented reality 3.Modern touch glasses 4.Holographic memory systems. A small holographic projector with a holographic memory and inbuilt processor will contain the entire Computer.
  14. 14. 1. Advertising 2. Gaming 3. Education 4. Training 5. Communication 6. Medical 7. Forensic Science
  15. 15. 1. Advertising 2. Gaming 3. Education 4. Training 5. Communication 6. Medical 7. Forensic Science
  16. 16. 1. Advertising 2. Gaming 3. Education 4. Training 5. Communication 6. Medical 7. Forensic Science
  17. 17. 1. Advertising 2. Gaming 3. Education 4. Training 5. Communication 6. Medical 7. Forensic Science
  18. 18. 1. Advertising 2. Gaming 3. Education 4. Training 5. Communication 6. Medical 7. Forensic Science
  19. 19. 1. Advertising 2. Gaming 3. Education 4. Training 5. Communication 6. Medical 7. Forensic Science
  20. 20. 1. Advertising 2. Gaming 3. Education 4. Training 5. Communication 6. Medical 7. Forensic Science
  21. 21. 1. Advertising 2. Gaming 3. Education 4. Training 5. Communication 6. Medical 7. Forensic Science
  22. 22. A palm sized holographic projector that projects an entire Computer. Your PC on your palm! Future IPad with an inbuilt Holographic projector
  23. 23. Remember those yellow ‘postits’?? Its soon to be old school with the new holographic projections taking its place. A teacher uses a holographic projection of the human body to show body metabolisms. No more of ‘just look at the diagram and understand’
  24. 24. Holographic projection technology has endless applications, as far as the human mind can imagine. It will become a very integral part of human societies and civilizations in the future. We are certain of that. However, will this technology not bring a little bad along with the good? What about reduced privacy, the financial imbalance that can occur due to its abilities? In what ways can it be misused? Is this great amount of technology really an advantage to human beings? A lot of questions unanswered! Only the future has these answers. Lets hope for the best.
  25. 25. http://www.madehow.com/Volume-3/Hologram.html#b http://science.howstuffworks.com/hologram9.htm http://en.wikipedia.org/wiki/Holography http://www.holoworld.com/ http://spie.org/Documents/Publications/00%20STEP%20ule %2010.pdf http://hyperphysics.phy-astr.gsu.edu/hbase/optmod/holog.html http://www.holography.ru/histeng.htm

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