Dennis Gabor invented the hologram in 1947 and was later awarded the Nobel Prize for it. Holography records light scattered from an object to present a three-dimensional image. There are several types of holography including optical, digital, and computer generated. 3D holographic projection technology is based on Pepper's Ghost and was first used in theaters in the 1860s. Applications of 3D holographic projection include marketing, education, medical diagnostics, entertainment, conferences, home use, virtual reality, the military, and engineering.

1. 3D HOLOGRAPHIC
PROJECTION
Introduction and Applications

2. HOLOGRAM
• To understand how a holographic projector works we
need to know what a hologram is.
• Holography is a photographic technique that records
the light scattered from an object, and then presents
it in a way that appears three-dimensional.
• The word holography comes from the Greek words
ὅλος (holos; "whole") and γραφή (graphē; "writing" or
"drawing").

3. HOLOGRAM - HISTORY
• Hungarian-British physicist Dennis Gabor invented
the hologram in 1947.
• He was awarded the Nobel Prize in Physics in 1971
"for his invention and development of the
holographic method".
• Originally, used in electron microscopy, where it is
known as electron holography.
• The development of the laser enabled the first
practical optical holograms that recorded 3D
objects to be made in 1962 by Yuri Denisyuk in the
Soviet Union and by Emmett Leith and Juris
Upatnieks at the University of Michigan, USA.
Dennis Gabor

4. THREE-DIMENSIONAL HOLOGRAPHIC
PROJECTION TECHNOLOGY
Three-dimensional
holographic projection
technology is loosely
based on an illusionary
technique called Peppers
Ghost, and was first used
in Victorian theatres
across London in the
1860s.

5. CATEGORIES OF HOLOGRAPHY
Category Interference fringe Recording of interference fringes Reconstruction
Holography optical
interference
DCG or PDLC Interference has been
recorded as
the photosensitive
material
hologram.
Digital Holography optical
interference
CCD or CMOS Spatial Light Modulator
Computer Generated
Holography
phase
calculation
with
computer
Lithography or etching Diffractive optical
element after
lithography or etching
Spatial Light Modulator
In recent years, the development of holography gradually toward to
digital holography and computer generated holography.

6. OPTICAL HOLOGRAPHY

7. DIGITAL HOLOGRAPHY
FIGURE 1
• Digital off-axis holography uses a CCD array to record a
digital hologram where the reference beam interferes
with the object beam.
• The data are transmitted to a computer and analyzed.
FIGURE 2
• A digital hologram is recorded on a CCD array,
and the data are processed on a computer to
create a digital 3D model in the computer.
• That model is then displayed on the screen,
shown as if in three dimensions.

8. COMPUTER GENERATED HOLOGRAPHY
Camera
LSLM
SF
Laser
Density Filter
Polarization Filter
Iris
Lens
PC
Lens
Lens
Lens
Mirror
Screen

9. • The double parabolic projection system is composed of double parabolic mirrors.
• The full-color computer-generated hologram is a real image, which could be
remade a virtual image through the double parabolic projection system.
• The image magnification appears to be 1.2
• The horizontal viewing angle appears 360° and the vertical viewing angle 15-75°.
A DOUBLE PARABOLIC MIRROR PROJECTION
SYSTEM

10. A DOUBLE PARABOLIC MIRROR PROJECTION
SYSTEM

11. Virtual image projection of full-color CGHs
Color coordinate analysis of white-light CGH
image reconstruction
Research Paper

12. PYRAMID-TYPE FLOATING
PROJECTION SYSTEM
• Four image display surfaces could be used for
presenting distinct information and switch the
angle of view for the 360 degree viewing.
• The 3D perception of dynamic floating images
could be reinforced by the pyramid structure.
• The matching of algorithms and optical
mechanisms developed could present various
colors on different display surfaces.
• Large-size holographic image (surround splice).

13. Schematic of the design of 360-degree
tabletop electronic holographic display,
the design concept of which allows
several persons to enjoy the hologram
contents simultaneously.
Credit: Yongjun Lim, of the 5G Giga Communication
Research Laboratory, Electronics and
Telecommunications Research Institute, South Korea

14. APPLICATIONS OF 3D
HOLOGRAPHIC PROJECTION

15. Marketing with 3D holographic display 3D Holography in education

16. In Medical Diagnostics In Entertainment Industry

17. 3D presentations for conference
rooms and meetings
Home Entertainment

18. Virtual Reality, Augmented reality and Telepresence

19. Military Operations Engineering Designs

20. CONCLUSION
3D holographic projection is a rapidly growing technology that will change how we
view things in the new era. It will have tremendous effects on all fields of life.
Holographic Technology and Spectral Imagining have endless applications, as far as
the human mind can imagine.

21. REFERENCES
• https://phys.org/news/2016-10-full-circle-viewing-degree-electronic-
holographic.html
• https://www.computerworld.com/article/3249605/virtual-reality/the-future-of-3d-
holograms-comes-into-focus.html
• https://www.nature.com/articles/srep11750
• https://www.researchgate.net/publication/286763143_Full-color_and_less-
speckled_modified_Gerchberg-Saxton_algorithm_computer-
generated_hologram_floating_in_a_dual-parabolic_projection_system