3D Holographic Projection Technology ABIN BABY ROLL NO: 03

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 College of Engineering Munnar

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 College of Engineering Munnar

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 College of Engineering Munnar

Timeline of holography 5 College of Engineering Munnar

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 College of Engineering Munnar

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 7 College of Engineering Munnar

How holograms work  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 8 College of Engineering Munnar

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 College of Engineering Munnar

Recording a hologram 10 College of Engineering Munnar

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 College of Engineering Munnar

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 College of Engineering Munnar

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. Hologram Recording Hologram Recondtruction 13 College of Engineering Munnar

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Reconstruction of hologram  The photographic plate is illuminated with original light source used for recording holograms. 15 College of Engineering Munnar

Reconstructing a hologram 16 College of Engineering Munnar

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. 17 College of Engineering Munnar

Projection of holographic video  Video hologram is coded into light modulators  These light modulators are illuminated by coherent light beam source, to project video 18 College of Engineering Munnar

Projection of multicolour holographic video 19 College of Engineering Munnar

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 College of Engineering Munnar

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  Military and Space Applications 21 College of Engineering Munnar

 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 22 College of Engineering Munnar

Projected cost of Holographic system 23 College of Engineering Munnar

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 College of Engineering Munnar

“ 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 “ HowStuffWorks, Inc. Downloaded November 05, References 25 College of Engineering Munnar

Thank you 26 College of Engineering Munnar

Questions? 27 College of Engineering Munnar

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