The document discusses 3D holographic projection technology, including its definition, types, how holograms work, and their recording and reconstruction processes. It highlights advancements in holography, applications in various fields such as education and entertainment, and predicts that holographic displays will eventually replace traditional screens. The technology offers high-resolution, interactive, and life-like images without the need for glasses or projection screens.

1. 3D Holographic Projection
Technology
ABIN BABY
ROLL NO: 13110602
COLLEGE OF ENGINEERING
MUNNAR

2. Contents
2
What is Holography
•
Why Holography
•
Types of Holograms
•
How Holograms work
•
Recording of hologram
•
Reconstruction of hologram
•
Advances in technology
•
Applications & Future scope
•
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•
Conclusion

3. What is holography
3
 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
subject
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the 3-D information of a holographed

4. Why
holographic
display
4
A
high
resolution
three
dimensional recording of an
object
 Glasses
free 3D display
 No
need for projection screen
 Life
like images
 Interactive
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display

5. Timeline of holography
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5

6. Types of
Holograms
6
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
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8. How
holograms
work
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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
9
 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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10

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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
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13. Process

13
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
Recondtruction
Hologram
Recording
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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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16

17. Capturing of
holographic
video
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17

By
replacing
the
conventional
holographic plate with
a digital camera and an
optoelectronic
2D
screen,
we
can
capture
and display
holographic video.

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

19. Projection of multicolour holographic
video
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19

20. Advances in
technology
20
 Touchable
holograms
 Tactile
holographic
with
haptic
display
feedback
 Horizontal
360º view of a
image on table top
 User
interfacing
integrated displays
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21. Applications
& Future scope
21
Educational applications

Marketing with 3D holographic
display

3D simulation displays
scientific visualization

Improved virtual Reality and
augmented reality

Telepresence
conferencing

Entertainment displays

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
Military and Space Applications
and
for
video

22. 22


Intense
rooms

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Holographic checkpoint
for military, battlefield
simulations
In future all displays like
televisions, mobile phone
displays,
projector
displays will be replaced
by holographic displays
real
gaming

24. Projected cost of Holographic
system
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24

25. Conclusion
25
Holographic
Technology
and Spectral Imagining has
endless applications, as far
as the human mind can
imagine

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
In
future,
holographic
displays will be replacing
all present displays in all
sizes, from small phone
screen to large projectors

26. References
26
• “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>
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