This document discusses 3D holographic projection technology. It begins by defining holography as a technique that records and reconstructs light scattered from an object to preserve its 3D information. It then covers the basic components and process for recording and reconstructing holograms, as well as advances and applications of the technology. Key points include: holograms allow for glasses-free 3D displays without a projection screen; recording involves splitting a laser beam between an object and reference beam which interfere to imprint a pattern on film; reconstruction illuminates the film to regenerate the 3D image. Future applications may include improved virtual and augmented reality, telepresence, and holographic displays replacing all screen types.

1. 3D Holographic Projection Technology
Shrijeet Kumar
05124802018
Ambedkar Institute of
Technology
SEMINAR
Under the guidance of:
Ms. Ishleen Kaur
BCA
AIT
By:

2. Contents • What isHolography
• Why Holography
• Types of Holograms
• How Holograms work
• Recording of hologram
• Reconstruction of hologram
• Advances in technology
• Applications & Future scope
• Conclusion
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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
resolution three
recording of an
▶ A high
dimensional
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. Reflection 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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7. is
pattern
digitally, using
 Interference
calculated
algorithms
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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

8. How
holograms
work
The time-varying light field
of a scene with all its physical
properties is to be recorded
and then regenerated.
working of
divided into
Hence the
holography is
two phases:
•Recording
•Reconstruction
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9. Recording
of hologram ▶ Basic tools required to
make a hologram
includes a red lasers,
beam splitter,
and holographic
lenses,
mirrors
film
▶ Holograms are recorded
in darker environment
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10. Recording a hologram 10

11. 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)

12. 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

13. Process
Hologram
Recording
▶ 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
Reconstruction
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14. Reconstructing a hologram 14

15. Reconstruction
of hologram
▶ The photographic plate
is illuminated with
original light source used
for recording holograms.
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16. Capturing of
holographic
video ▶ By replacing the
conventional
holographic plate with
a digital camera and an
optoelectronic
screen, we
capture and
2D
can
display
holographic video.
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17. 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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18. Projection of multicolour holographic
video
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19. Advances in
technology Touchable holograms
holographic
with haptic
Tactile
display
feedback
Horizontal 360º view of a
image on table top
User interfacing
integrated displays
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20. Applications
& Future scope
▶ Educational applications
▶ Marketing with 3D holographic
display
▶ 3D simulation displays for
scientific visualization
▶ Improved virtual Reality and
video
augmented reality
▶ Telepresence and
conferencing
▶ Entertainment displays
▶ Military and Space Applications
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21. ▶ Holographic
for military,
checkpoint
battlefield
simulations
▶ Intense real gaming
rooms
▶ In future all displays like
televisions, mobile phone
displays, projector
displays will be replaced
by holographic displays
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22. Projected cost of Holographic
system
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23. Conclusion ▶ Holographic Technology
and Spectral Imagining has
endless applications, as far
as the human mind can
imagine
▶ In future,
displays will
all present
holographic
be replacing
displays in all
sizes, from small phone
screen to large projectors
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24. Thank you
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