Holographic Projection Technology COMPLETE DETAILS NEW PPT


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This seminar examines the new technology of Holographic Projections. It
highlights the importance and need of this technology and how it represents the new
wave in the future of technology and communications, the different application of the
technology, the fields of life it will dramatically affect including business, education,
telecommunication and healthcare. The paper also discusses the future of holographic
technology and how it will prevail in the coming years highlighting how it will also
affect and reshape many other fields of life, technologies and businesses.
Holography is a diffraction-based coherent imaging technique in which a
complex three-dimensional object can be reproduced from a flat, two-dimensional
screen with a complex transparency representing amp litude and phase values. It is
commonly agreed that real-time holography is the ne plus ultra art and science of
visualizing fast temporally changing 3-D scenes. The integration of the real-time or
electro-holographic principle into display technology is o ne of the most promising but
also challenging developments for the future consumer display and TV market. Only
holography allows the reconstruction of natural-looking 3-D scenes, and therefore
provides observers with a completely comfortable viewing experience. But to date
several challenges have prevented the technology from becoming commercialized. But
those obstacles are now starting to be overcome. Recently, we have developed a novel
approach to real-time display holography by combining an overlapping sub-hologram
technique with a tracked viewing-window technology.

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Holographic Projection Technology COMPLETE DETAILS NEW PPT

  1. 1. 3D Holographic Projection Technology ABIN BABY ROLL NO: 13110602 COLLEGE OF ENGINEERING MUNNAR
  2. 2. Contents 2 What is Holography • Why Holography • Types of Holograms • How Holograms work • Recording of hologram • Reconstruction of hologram • Advances in technology • Applications & Future scope • College of Engineering Munnar • Conclusion
  3. 3. What is holography 3  Holography is a technique that allows the light scattered from an object to be recorded and later reconstructed.  The technique to optically store, retrieve, and process information.  Preserve subject College of Engineering Munnar the 3-D information of a holographed
  4. 4. Why holographic display 4 A high resolution three dimensional recording of an object  Glasses free 3D display  No need for projection screen  Life like images  Interactive College of Engineering Munnar display
  5. 5. Timeline of holography College of Engineering Munnar 5
  6. 6. Types of Holograms 6 A. Reflex hologram  Illuminated by a spot of white incandescent light source, from front-above  The image consists of light reflected by the hologram  Produces multicolour holograms, makes images optically indistinguishable from the original objects College of Engineering Munnar
  7. 7. 7 B. Transmission hologram  Viewed with laser light, usually of the same type used to make the recording  Need light source behind them  Virtual image can be very sharp and deep C.Computer-generated holograms  No need for a real object  Interference pattern is calculated digitally, using algorithms College of Engineering Munnar
  8. 8. How holograms work College of Engineering Munnar 8 The time-varying light field of a scene with all its physical properties is to be recorded and then regenerated.  Hence the working of holography is divided into two phases: •Recording •Reconstruction
  9. 9. Recording of hologram 9  Basic tools required to make a hologram includes a red lasers, lenses, beam splitter, mirrors and holographic film  Holograms are recorded in darker environment College of Engineering Munnar
  10. 10. Recording a hologram College of Engineering Munnar 10
  11. 11. 11 • Laser : Red lasers, usually helium-neon (HeNe) lasers, are common in holography. These are coherent light source. • Beam splitter: This is a device that uses mirrors and prisms to split laser beam of light into two beams.  Object beam (directed onto the object) and  Reference beam (travels directly onto the recording medium) College of Engineering Munnar
  12. 12. 12 • Mirrors: These direct the beams of light to the correct locations • Holographic film: Holographic film can record light at a very high resolution, which is necessary for creating a hologram. It's a layer of light-sensitive compounds on a transparent surface, like photographic film. Eg: Silver Halide Emulsion College of Engineering Munnar
  13. 13. Process  13 When the two laser beams reach the recording medium, their light waves intersect and interfere with each other. It is this interference pattern that is imprinted on the recording medium. Hologram Recondtruction Hologram Recording College of Engineering Munnar
  14. 14. 14 College of Engineering Munnar
  15. 15. 15 Reconstruction of hologram  The photographic plate is illuminated with original light source used for recording holograms. College of Engineering Munnar
  16. 16. Reconstructing a hologram College of Engineering Munnar 16
  17. 17. Capturing of holographic video College of Engineering Munnar 17  By replacing the conventional holographic plate with a digital camera and an optoelectronic 2D screen, we can capture and display holographic video.
  18. 18. Projection of holographic video 18 Video hologram is coded into light modulators  College of Engineering Munnar  These light modulators are illuminated by coherent light beam source, to project video
  19. 19. Projection of multicolour holographic video College of Engineering Munnar 19
  20. 20. Advances in technology 20  Touchable holograms  Tactile holographic with haptic display feedback  Horizontal 360º view of a image on table top  User interfacing integrated displays College of Engineering Munnar
  21. 21. Applications & Future scope 21 Educational applications  Marketing with 3D holographic display  3D simulation displays scientific visualization  Improved virtual Reality and augmented reality  Telepresence conferencing  Entertainment displays  College of Engineering Munnar  Military and Space Applications and for video
  22. 22. 22   Intense rooms  College of Engineering Munnar Holographic checkpoint for military, battlefield simulations In future all displays like televisions, mobile phone displays, projector displays will be replaced by holographic displays real gaming
  23. 23. Projected cost of Holographic system College of Engineering Munnar 24
  24. 24. Conclusion 25 Holographic Technology and Spectral Imagining has endless applications, as far as the human mind can imagine  College of Engineering Munnar  In future, holographic displays will be replacing all present displays in all sizes, from small phone screen to large projectors
  25. 25. References 26 • “Holographic Projection Technology: The World is Changing.”; Ahmed Elmorshidy, Ph.D JOURNAL OF TELECOMMUNICATIONS, VOLUME 2, ISSUE 2, MAY 2010 • “Capture, processing, and display of real-world 3D objects using digital holography”; Thomas J. Naughton; 2010 IEEE Invited Paper • “Touchable Holography”; Takayuki Hoshi; The University of Tokyo; 2009 • “Holographic 3-D Displays - Electro-holography within the Grasp of Commercialization”; Stephan Reichelt, Ralf Haussler, Norbert Leister, Gerald Futterer, Hagen Stolle and Armin Schwerdtner (2010) • “How Holograms Work.”; Wilson, Tracy V. 2010.“ HowStuffWorks, Inc. Downloaded November 05, 2010. <http://science.howstuffworks.com/hologram.html> College of Engineering Munnar
  26. 26. 27 Thank you College of Engineering Munnar
  27. 27. 28 Questions? College of Engineering Munnar
  28. 28. 29 For 17 other reference papers in this topic and if you have any doubts contact me Facebook/abin2892 College of Engineering Munnar