3D Holographic Projection Technology

3D Holographic Projection Technology

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COLLEGE OF ENGINEERINGMUNNAR1Contents

What is HolographyWhy HolographyTypes of HologramsHow Holograms workRecording of hologramReconstruction of hologramAdvances in technologyApplications & Future scopeConclusion

2College of Engineering Munnar2What is holographyHolographyis a technique that allows thelight 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

3College of Engineering MunnarWhy holographic displayA high resolution three dimensional recording of an objectGlasses free 3D displayNo need for projection screenLife like imagesInteractive display

4College of Engineering MunnarTimeline of holography

5College of Engineering MunnarTypes of HologramsReflex hologramIlluminated by a spot of white incandescent light source, from front-aboveThe image consists of light reflected by the hologramProduces multicolour holograms, makes images optically indistinguishable from the original objects

6College of Engineering Munnar6Transmission hologramViewed with laser light, usually of the same type used to make the recordingNeed light source behind themVirtual image can be very sharp and deepComputer-generated hologramsNo need for a real objectInterference pattern is calculated digitally, using algorithms

7College of Engineering MunnarHow 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:RecordingReconstruction

8College of Engineering MunnarRecording of hologram

Basic tools required to make a hologram includes a red lasers, lenses, beam splitter, mirrors and holographic filmHolograms are recorded in darker environment

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Recording a hologram10College of Engineering MunnarLaser : 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) andReference beam (travels directly onto the recording medium)11College of Engineering MunnarMirrors: These direct the beams of light to the correct locationsHolographic 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 Emulsion12College of Engineering MunnarProcessWhen the two laser beams reach the recording medium, their light waves intersect andinterferewith each other. It is this interference pattern that is imprinted on the recording medium.

HologramRecordingHologramRecondtruction13College of Engineering Munnar

14College of Engineering MunnarReconstruction of hologram

The photographic plate is illuminated with original light source used for recording holograms.

15College of Engineering MunnarReconstructing a hologram

16College of Engineering MunnarCapturing of holographic videoBy replacing the conventional holographic plate with a digital camera and an optoelectronic 2D screen, we can capture and display holographic video.

17College of Engineering MunnarProjection of holographic videoVideo hologram is coded into light modulators These light modulators are illuminated by coherent light beam source, to project video

18College of Engineering MunnarProjection of multicolour holographic video

19College of Engineering MunnarAdvances in technology

Touchable hologramsTactile holographic display with haptic feedbackHorizontal 360 view of a image on table topUser interfacing integrated displays

20College of Engineering MunnarApplications & Future scope

Educational applicationsMarketing with 3D holographic display3D simulation displays for scientific visualizationImproved virtual Reality and augmented realityTelepresence and video conferencingEntertainment displaysMilitary and Space Applications

21College of Engineering MunnarHolographic checkpoint for military, battlefield simulationsIntense real gaming roomsIn future all displays like televisions, mobile phone displays, projector displays will be replaced by holographic displays

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Projected cost of Holographic system

24College of Engineering MunnarConclusionHolographic Technology and Spectral Imagining has endless applications, as far as the human mind can imagineIn future, holographic displays will be replacing all present displays in all sizes, from small phone screen to large projectors

25College of Engineering MunnarHolographic Projection Technology: The World is Changing.; Ahmed Elmorshidy, Ph.DJOURNAL OF TELECOMMUNICATIONS, VOLUME 2, ISSUE 2, MAY 2010Capture, 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; 2009Holographic 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.

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