3 d holographic projection technology

1. 3D Holographic Projection
Technology
swathi.b

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
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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
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5. Timeline of holography
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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
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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
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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
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10. Recording a hologram
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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)
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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
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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.
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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.
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16. Reconstructing a hologram
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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.
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18. Projection of
holographic
video
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 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
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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
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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
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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

23. Projected cost of Holographic
system
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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
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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
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26. Thank you
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27. Questions?
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