3d Holographic Projection Technology PPT
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Transcript of 3d Holographic Projection Technology PPT
3D Holographic Projection Technology
GUIDED BY,SAFUVAN T
ASST.PROFESSORDEPT.OF ECEYCET
SUBMITTED BY,SHAHID SROLLNO:
12416055YCET
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2Contents • What is Holography
• Why Holography• Types of Holograms• How Holograms work• Recording of hologram• Reconstruction of
hologram• Advances in
technology• Applications & Future
scope• Conclusion
3What 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
4Why 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
5Timeline of holography
6Types 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
7B.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
8How 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
9Recording 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
10Recording a
hologram
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• 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)
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• 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
13Process
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.
HologramRecording
HologramRecondtruction
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Reconstruction of hologram
The photographic plate is illuminated with original light source used for recording holograms.
15Reconstructing a hologram
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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.
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Projection of holographic video
Video hologram is coded into light modulators
These light modulators are illuminated by coherent light beam source, to project video
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Advances in technology Touchable
holograms Tactile holographic
display with haptic feedback
Horizontal 360º view of a image on table top
User interfacing integrated displays
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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
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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
21Conclusio
n 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
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• “Holographic Projection Technology: The World is Changing.”; Ahmed Elmorshidy, Ph.DJOURNAL 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)
References
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Thank you