3 d holographic projection technology
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This document discusses 3D holographic projection technology. It begins by defining holography as a technique that records and reconstructs light scattered from an object, allowing the 3D information of a subject to be preserved. It then covers the basic components used to make holograms such as lasers and film, and explains the two-step process of recording and reconstructing holograms through the interference of light waves. Applications discussed include education, marketing, scientific visualization, and future uses in virtual and augmented reality. The document concludes by suggesting holographic displays will eventually replace all other display technologies.
3 d holographic projection technology
- 2. Contents • What is Holography • Why Holography • Types of Holograms • How Holograms work • Recording of hologram • Reconstruction of hologram • Advances in technology • Applications & Future scope • Conclusion 2
- 3. What is holography 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 the 3-D information of a holographed subject 3
- 4. Why holographic display A high resolution three dimensional recording of an object Glasses free 3D display No need for projection screen Life like images Interactive display 4
- 6. Types of Holograms 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 6
- 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
- 8. How holograms work 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. Recording of hologram Basic tools required to make a hologram includes a red lasers, lenses, beam splitter, mirrors and holographic film Holograms are recorded in darker environment 9
- 10. Recording a hologram College of Engineering Munnar 10
- 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) 11
- 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 12
- 13. Process 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. College of Engineering Munnar 13 Hologram Recording Hologram Recondtruction
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- 15. Reconstruction of hologram The photographic plate is illuminated with original light source used for recording holograms. 15
- 17. Capturing of holographic video By replacing the conventional holographic plate with a digital camera and an optoelectronic 2D screen, we can capture and display holographic video. College of Engineering Munnar 17
- 18. Projection of holographic video 18 Video hologram is coded into light modulators These light modulators are illuminated by coherent light beam source, to project video
- 19. Projection of multicolour holographic video 19
- 20. Advances in technology Touchable holograms Tactile holographic display with haptic feedback Horizontal 360º view of a image on table top User interfacing integrated displays 20
- 21. Applications & Future scope Educational applications Marketing with 3D holographic display 3D simulation displays for scientific visualization Improved virtual Reality and augmented reality Telepresence and video conferencing Entertainment displays 21
- 22. 22 Holographic checkpoint for military, battlefield simulations Intense real gaming rooms In future all displays like televisions, mobile phone displays, projector displays will be replaced by holographic displays
- 23. Projected cost of Holographic system 23
- 24. Conclusion Holographic Technology and Spectral Imagining has endless applications, as far as the human mind can imagine In future, holographic displays will be replacing all present displays in all sizes, from small phone screen to large projectors 24
- 25. • “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> References 25
- 26. Thank you 26
- 27. Questions? 27