3 d holographic projection technology seminar
Post on 14-Jun-2015
594 Views
Preview:
TRANSCRIPT
3D Holographic Projection Technology
NITESH KUMAR
SINGH
ROLL NO: 49
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
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
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 hologramIlluminated 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
7
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
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
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
• 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 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
HologramReconstruction
14
15Reconstruction of hologram
The photographic plate is illuminated with original light source used for recording holograms.
College of Engineering Munnar
16Reconstructing a hologram
17Capturing 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.
18Projection of holographic video Video hologram is coded
into light modulators These light modulators
are illuminated by coherent light beam source, to project video
College of Engineering Munnar
19Projection of multicolour
holographic video
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
21Applications & 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
22
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
23Projected cost of Holographic system
24Conclusion 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
College of Engineering Munnar
25
• “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)
• “How Holograms Work.”; Wilson, Tracy V. 2010.“ HowStuffWorks, Inc.Downloaded November 05, 2010.<http://science.howstuffworks.com/hologram.html>
References
26
Thank you
27
Questions?
28
For 17 other reference papers in this topic and if you have any doubts contact me
niteshnks1993
top related