3D Holographic Projection Technology

B.Tech SeminarReport
3D HOLOGRAPHIC PROJECTION TECHNOLOGY
Submitted in partial fulfillment for the award of the Degree of Bachelor of
Technology
inElectronics and Communication Engineering
of
The University of Kerala
Submitted by
SHAHID S(Register No: 12416055)
Under the guidance of
Mr. SAFUVAN T
Department of Electronics and Communication Engineering
YOUNUS COLLEGE OF ENGINEERING & TECHNOLOGY
KOLLAM-10
NOVEMBER 2015

Department of Electronics and Communication Engineering
YOUNUS COLLEGE OF ENGINEERING AND TECHNOLOGY
KOLLAM-10
CERTIFICATE
This is to certify that the seminar report entitled “3D HOLOGRAPHIC
PROJECTION TECHNOLOGY”is a bonafide record of the work done by SHAHID
S(Reg: no:12 416 055)of 7th
semester during the year 2015 under my supervision and
guidance, in the partial fulfillment for the award of Degree of Bachelor of Technology
in “Electronics and Communication Engineering” from the University of Kerala.
Seminar Guide Seminar Co-ordinators
Mr. SAFUVAN T Mr. RIYAS A NMr. ANEESH P THANKACHAN
Asst.Professor Asst.Professor Asso.Professor
Dept. of ECE Dept. of ECE Dept. of ECE
YCET YCET YCET
Mr. RAJEEV. S K
Head of the Department
Department of Electronics & Communication Engineering
Younus College of Engineering & Technology
Internal Examiner External Examiner

ACKNOWLEDGEMENT
First of all, I would like to thank the Lord Almighty for the blessings towards
the successful completion of our seminar.
I would like to express our sincere thanks to Dr. M Abdul Majeed, The
Principal, Younus College of Engineering & Technology,forproviding support and
necessary facilities for doing this seminar.
I sincerely thank Mr. Rajeev.S K, Head of the Department, Department of
Electronics & CommunicationEngineering for his support and encouragement that
led to the completion of this seminar.
I would like to thank Mr. Aneesh P Thankachan, Associate Professor and
Mr. Riyas A N, Assistant Professor,Department of Electronics
andCommunication Engineering,for giving us technical advice and timely
instructions, without which I could never have been able to complete the work in
time.
I also wish to thank Mr. Safuvan T, Assistant Professor, Department of
Electronics andCommunication Engineering, for providing valuable guidance.
Last, but not least I would like to thank, our parents and friends for all the
moral support during the preparation of this seminar.
SHAHID S

ABSTRACT
The holographic projection is a kind of 3D technology of without wearing any
glasses, and viewers can see the three-dimensional virtual character.This seminar
examines the new technology of Holographic Projections. It highlights the importance
and need of this technology and how it represents the new wave in the future of
technology and communications, the different application of the technology, the fields
of life it will dramatically affect including business, education, telecommunication
and healthcare. The paper also discusses the future of holographictechnology and how
it will prevail in the coming years highlighting how it will also affect and reshape
many other fields of life, technologies and businesses. We can often see the three-
dimensional holographic communication technology in science fiction movies,using
the principle of three-dimensional computer graphics, and the distant person or thing
can been projected in the air in the form of three-dimension.

i
CONTENTS
CHAPTER No: TITLE PAGE No:
List of Abbreviations iii
List of Figures iv
1 INTRODUCTION 1
2 3D HOLOGRAPHIC TECHNOLOGY 3
2.1 Holograms 3
2.2 Types Of Holograms 4
2.2.1 Reflection Hologram 4
2.2.2 Transmission Holograms 4
2.2.3 Computer Generated Holograms 5
3 3D HOLOGRAPHIC PROJECTION SYSTEM PRINCIPLE 6
4 IMPORTANCE AND NEED OF HOLOGRAPHIC
PROJECTION
9
4.1 Hologram Properties 11
5 3D HOLOGRAPHIC PROJECTION TECHNOLOGY
TYPES
12
6 WORKING OF HOLOGRAM 13
6.1 Reflection Holograms 14
6.1.1Recording Reflection Holograms 14
6.1.2 Reconstructing Reflection Holograms 15
6.2 Transmission Holograms 16
6.2.1 Recording Transmission Holograms 16
6.2.2 Reconstructing Transmission Holograms 16

ii
7 WORKING OF 3D HOLOGRAPHIC PROJECTION
TECHNOLOGY
18
7.1 Display Setup 20
7.2 Components Required 20
8 ADVANCEMENT IN HOLOGRAPHIC TECCHNOLOGY 21
8.1 Touchable Holograms 21
8.2 Tactile Display With Feedback 21
8.3 User Interfacing Integrated Display 21
8.4 360 Degree 3D System 21
9 APPLICATIONS AND FUTURE SCOPE 22
9.1 Marketing With 3D Holographic Display 22
9.2 Holography In Education 22
9.3 Holography In Entertainment Industry 22
9.4 Projection Displays 23
10 ADVANTAGES OF HOLOGRAPHIC PROJECTION 24
11 CONCLUSION 25
REFERENCE 26

iii
LIST OF ABBREVIATIONS
3DHT - 3D Holographic Technology
CGH - Computer Generated Hologram
DLP - Digital Light Processing
LCD - Liquid Crystal Display
SLM - Spatial Liquid Modulator
TFT - Thin Film Transistor

iv
LIST OF FIGURES
FIGURE No: TITLE PAGE No:
3.1 Holographic projection schematic 6
3.2 Computer generated holographic principle 8
6.1 Recording of reflex hologram 14
6.2 Image recording of reflection hologram 15
6.3 Image reconstruction of reflection hologram 15
6.4 Image recording of transmission hologram 16
6.5 Image reconstruction of transmission hologram 17
6.6 Image reconstruction, Primary image 17
6.7 Image reconstruction, Secondary image 17
7.1 Recorded hologram from coherent beam of light 19
7.2 Appearance of virtual image through reconstructed
waveform
19
7.3 3D Holographic projection 20

3D Holographic Projection Technology Seminar Report 2015
Dept. of ECE 1 YCET Kollam
CHAPTER 1
INTRODUCTION
It can often see the three-dimensional holographic communication technology
in science fiction movies, using the principle of three-dimensional computer graphics,
and the distant person or thing can been projected in the air in the form of three-
dimensional. With the development of science, all the equipment are miniaturization
and precision, while the display device cannot match, and people have a demand for a
new display technology to solve the problem. The 3D holographic projection is
precisely as this role. The word, hologram is composed of the Greek terms, "holos"
for "whole view"; and gram meaning "written". A hologram is a three-dimensional
record of the positive interference of laser light waves. A technical term for
holography is wave front reconstruction. Dennis Gabor, the Hungarian physicist
working on advancement research for electron micro-scopes, discovered the basic
technology of holography in 1947. However, the technique was not fully utilized until
the 1960s, when laser technology was perfected. 3D Holographic Technology (3DHT)
created in 1962. Holography, means of creating a unique photographic image without
the use of a lens. The photographic recording of the image is called a hologram,
which appears to be an unrecognizable pattern of stripes and whorls but which when
illuminated by coherent light, as by a laser beam organizes the light into a three
dimensional representation of the original object.
3D Holographic projection technology is the new sign of future technology
and communications. This technology first received attention worldwide in 2008
when Prince Charles addressed the World future energy summit and made his first
appearance as a hologram in a bid to reduce the royal carbon footprint. In past,
American leader Al Gore launched Live Earth Tokyo in a high-tech, virtual way – as
a hologram using Holographic Projection. This technology has been used widely to
launch the products and create fun. The 3D holographic projection technology is also
known as ''Musion Eyeliner.'' Musion Eyeliner – is a variation on the Pepper‟s Ghost
stage illusion. Here, the images used are three-dimensional images, but projected as

two-dimensional images (2D/3D) into a 3D stage set, therefore the mind of the
audience create the 3D illusion. Subjects are filmed in HDTV and broadcast on to the
foil through HDTV projection systems, driven by HD Mpeg2 digital hard disc
players, or uncompressed full HDTV video players. This means that production costs
are minimal, needing only the single camera lenses for filming and a single projector
for the playback hence the phrase „Glasses-free viewing‟. With the different
application of this technology, it will dramatically affect all the fields of life including
business, education, telecommunication and healthcare.

CHAPTER 2
3D HOLOGRAPHIC TECHNOLOGY
Holography is a diffraction-based coherent imaging technique in which a
complex three-dimensional object can be reproduced from a flat, two-dimensional
screen with a complex transparency representing amplitude and phase values. It is
commonly agreed that real-time holography is the ne plus ultra art and science of
visualizing fast temporally changing 3-D scenes. The integration of the real-time or
electro-holographic principle into display technology is one of the most promising but
also challenging developments for the future consumer display and TV market. Only
holography allows the reconstruction of natural-looking 3-D scenes, and therefore
provides observers with a completely comfortable viewing experience.
A holoprojector will use holographic technology to project large-scale, high-
resolution images onto a variety of different surfaces, at different focal distances,
from a relatively small-scale projection device. To understand the technology used in
holographic projection, we must understand the term „Hologram‟, and the process of
making and projecting holograms. Holography is a technique that allows the light
scattered from an object to be recorded and later reconstructed. The technique to
optically store, retrieves, and process information. The holograms preserve the 3-D
information of a holographed subject, which helps to project 3D images.
2.1 HOLOGRAMS
A hologram is a physical component or device that stores information about
the holographic image. For example a hologram can be a grating recorded on a piece
of film. It is especially useful to be able to record a full image of an object in a short
exposure if the object or space changes in time. Holos means “whole” and graphein
means “writing”. Holography is a technique that is used to display objects or scenes in
three dimensions. These 3D images are called holograms. A photographic record
produced by illuminating the object with coherent light (as from a laser) and, without
using lenses, exposing a film to light reflected from this object and to a direct beam of

coherent light. When interference patterns on the film are illuminated by the coherent
light a three-dimensional image is produced.
2.2 TYPES OF HOLOGRAMS
A hologram is a recording in a two-or three-dimensional medium of the
interference pattern formed when a point source of light (the reference beam) of fixed
wavelength encounters light of the same fixed wavelength arriving from an object (the
object beam). When the hologram is illuminated by the reference beam alone, the
diffraction pattern recreates the wave fronts of light from the original object. Thus, the
viewer sees an image indistinguishable from the original object.
There are many types of holograms, and there are varying ways of classifying
them. For our purpose, we can divide them into three types: reflection hologram,
transmission holograms and computer generated holograms.
2.2.1 Reflection Hologram
The reflection hologram, in which a truly three-dimensional image is seen near
its surface, is the most common type shown in galleries. The hologram is illuminated
by a “spot” of white incandescent light, held at a specific angle and distance and
located on the viewer‟s side of the hologram. Thus, the image consists of light
reflected by the hologram. Recently, these holograms have been made and displayed
in colour their images optically indistinguishable from the original objects. If a mirror
is the object, the holographic image of the mirror reflects white light.
2.2.2 Transmission Holograms
The typical transmission hologram is viewed with laser light, usually of the
same type used to make the recording. This light is directed from behind the hologram
and the image is transmitted to the observer‟s side. The virtual image can be very
sharp and deep. Furthermore, if an undiverged laser beam is directed backward
(relative to the direction of the reference beam) through the hologram, a real image
can be projected onto a screen located at the original position of the object.

2.2.3 Computer Generated Holograms
Computer Generated Holography (CGH) is the method of digitally generating
holographic interference patterns. A holographic image can be generated e.g. by
digitally computing a holographic interference pattern and printing it onto a mask or
film for subsequent illumination by suitable coherent light source. Alternatively, the
holographic image can be brought to life by a holographic 3D display (a display
which operates on the basis of interference of coherent light), bypassing the need of
having to fabricate a "hardcopy" of the holographic interference pattern each time.
Consequently, in recent times the term "computer generated holography" is
increasingly being used to denote the whole process chain of synthetically preparing
holographic light wave fronts suitable for observation.
Computer generated holograms have the advantage that the objects which one
wants to show do not have to possess any physical reality at all (completely synthetic
hologram generation). On the other hand, if holographic data of existing objects is
generated optically, but digitally recorded and processed, and brought to display
subsequently, this is termed CGH as well.

CHAPTER 3
3D HOLOGRAPHIC PROJECTION SYSTEM PRINCIPLE
The holographic projection is a kind of 3D technology of without wearing
glasses, and viewers can see the three-dimensional virtual character. This technology
is more in some museum applications. Three-dimensional holographic projection
equipment is not the use of digital technology, but the projection equipment projects
the different angle image to the holographic projection membrane, so that you can see
other images that are not belong to your own point of view, and thus achieve a true
three-dimensional holographic image.
360 degree phantom imaging is a three-dimensional screen that imaging is
suspended in mid-air imaging in the real, creating magic and real atmosphere, and the
effect is peculiar, with a strong sense of depth. The object can be conjunct with the
phantom in the air, also be available with touch screen interaction with the audience.
Holographic interactive display system is a combination with nanometer touch
sensitive membrane and scattering rear-projection imaging technology, andit is a
novel and extraordinary presentation. Visitors can interact with holographic display
glass, and be given a mysterious and magical fantasy feeling and provided the
modern, stylish, interactive tools for the query of the display.
3D holographic projection is the technology that record and reproduce objects
in real 3D image with using of interference and diffraction theory. Holographic
projection schematic is been shown in Fig.3.1
Fig.3.1. Holographic projection schematic

The first step is to record the object light wave information by interference
principle, namely, the shooting process: the subject under laser irradiation forms a
diffuse object beam; another part of the laser as a reference beam shines on the
holographic film, and the object beam is been superimposed and produce interference,
converts the phase and amplitude of object light waves to the intensity in space
changes, thus records all the information of the object light waves with using of
contrast and spacing in interference strips. The film, recording the interference stripes,
after developing and fixing handler, will become a hologram or holographic photo.
The second step is by diffraction theory to that reproduce the object light wave
information, which is the imaging process: the hologram is like a complex grating, in
coherent laser, the sine-hologram diffraction light waves of a linear record of
generally give two the original image (also known as the initial image) and the
conjugate image. The image of reproduction has the strong three-dimensional sense,
and a real visual effect. Every part of the hologram recorded the light of the object, so
in principle, every part can reproduce the original image, a number of different
images can be recorded on a film by multiple-exposure and showed each other
without disturbing.
Holographic projection technology is holography displayed reversely. In
essence, it is the formation of three-dimensional images on the air or a specialthree-
dimensional lens. This technology breaks throughthe limitations of traditional sound,
light, power, andthe image is color, the contrast and clarity are veryhigh. Unlike the
flat screen projection displaying thestereoscopic perception only in the two-
dimensionalsurface by the effect of perspective and shadows,holographic projection
technology isthe real rendering of 3D images, which different sides of the image can
be viewed from any angle of 360 degree. Decorative and practicality are blended, and
the strong sense of space and perspective are the most attractive place of this
technique. The holographic projection is expected to become the ultimate show
solutions beyond the current 3D technology.The computer-generated holographic
principle can be including the calculation process and the reproduce, which shown in
Fig.3.2

Fig.3.2. Computer generated holographic principle
The calculation process transforms the three-dimensional information into a
holographic stripe, which there are two methods based on interference and diffraction.
The interference and diffraction are all the basic nature of light. Interference is more
than two (or two) light waves with the same frequency, the same vibration direction
and the constant phase difference, in the superposition of the space, and forms the
constant strengthening and weakening in the overlap area. Diffraction is that the light
waves display the derivative phenomenon in the communication process through the
edges or porosity of the obstacles. The greater the wavelength, the smaller the pore,
the exhibition derivative phenomenon is more obvious.
The reproduce process is the holographic stripes generated by the spatial light
modulator (SLM) modulated the incident light, and converts stripes into visible three-
dimensional images. In essence, the calculated hologram information produced and
reproduced by computer-controlled graphics device on the physical media.

CHAPTER 4
IMPORTANCE AND NEED OF HOLOGRAPHIC PROJECTION
The interest in 3D viewing is not new. The public has embraced this
experience since at least the days of stereoscopes, at the turn of the last century. New
excitement, interest, and enthusiasm then came with the 3D movie craze in the middle
of the last century, followed by the fascinations of holography, and most recently the
advent of virtual reality. Recent developments in computers and computer graphics
have made spatial 3D images more practical and accessible. The computational power
now exists, for example, for desktop workstations to generate stereoscopic image
pairs quickly enough for interactive display. At the high end of the computational
power spectrum, the same technological advances that permit intricate object
databases to be interactively manipulated and animated now permit large amounts of
image data to be rendered for high quality 3D displays.
Modern three-dimensional (”3D”) display technologies are increasingly
popular and practical not only in computer graphics, but in other diverse
environments and technologies as well. Growing examples include medical
diagnostics, flight simulation, air traffic control, battlefield simulation, weather
diagnostics, entertainment, advertising, education, animation, virtual reality, robotics,
biomechanical studies, scientific visualization, and so forth. The increasing interest
and popularity are due to many factors. In our daily lives, we are surrounded by
synthetic computer graphic images both in principle and on television. People can
nowadays even generate similar images on personal computers at home. We also
regularly see holograms on credit cards and lenticular displays on cereal boxes.
There is also a growing appreciation that twodimensional projections of 3D
scenes, traditionallyreferred to as “3D computer graphics”, can be insufficient for
inspection, navigation, and comprehension of some types of multivariate data.
Without the benefit of 3D rendering, even high quality images that have excellent
perspective depictions still appear unrealistic and flat. For such application
environments, the human depth cues of stereopsis, motion parallax, and (perhaps to a

lesser extent) ocular accommodations are increasingly recognized as significant and
important for facilitating image understanding and realism.
In other aspects of 3D display technologies, such as the hardware needed for
viewing, the broad field of virtual reality has driven the computer and optics
industries to produce better stereoscopic helmet mounted and boom-mounted
displays, as well as the associated hardware and software to render scenes at rates and
qualities needed to produce the illusion of reality. However, most voyages into virtual
reality are currently solitary and encumbered ones: users often wear helmets, special
glasses, or other devices that present the 3D world only to each of them individually.
A common form of such stereoscopic displays uses shuttered or passively polarized
eyewear, in which the observer wears eyewear that blocks one of two displayed
images, exclusively one each for each eye. Examples include passively polarized
glasses, and rapidly alternating shuttered glasses.
While these approaches have been generally successful, they have not met
with widespread acceptance because observers generally do not like to wear
equipment over their eyes. In addition, such approaches are impractical, and
essentially unworkable, for projecting a 3D image to one or more casual passersby, to
a group of collaborators, or to an entire audience such as when individuated
projections are desired. Even when identical projections are presented, such situations
have required different and relatively underdeveloped technologies, such as
conventional auto stereoscopic displays. Thus, a need still remains for highly
effective, practical, efficient, uncomplicated, and inexpensive auto stereoscopic 3D
displays that allow the observer complete and unencumbered freedom of movement.
Additionally, a need continues to exist for practical auto stereoscopic 3D displays that
provide a true parallax experience in both the vertical as well as the horizontal
movement directions.
A concurrent continuing need for such practical auto stereoscopic 3D displays
that accommodate multiple viewers independently and simultaneously. A particular
advantage would be afforded if the need could be fulfilled to provide such
simultaneous viewing in which each viewer could be presented with a uniquely
customized auto stereoscopic 3D image that could be entirely different from that

being viewed simultaneously by any of the other viewers present, all within the same
viewing environment, and all with complete freedom of movement therein. Yet
another urgent need is for an unobtrusive 3D viewing device that combines feedback
for optimizing the viewing experience in combination with provisions for 3D user
input, thus enabling viewing and manipulation of virtual 3D objects in 3D space
without the need for special viewing goggles or headgear. In view of the ever
increasing commercial competitive pressures, increasing consumer expectations, and
diminishing opportunities for meaningful product differentiation in the marketplace, it
is increasingly critical that answers be found to these problems. Moreover, the ever-
increasing need to save costs, improve efficiencies, improve performance, and meet
such competitive pressures adds even greater urgency to the critical necessity that
answers be found to these problems.
4.1 HOLOGRAM PROPERTIES
 Appears as a real object from different angles.
 Usually just look like a sparkly pictures or smears of color.
 Each cut views the entire holographic image.

CHAPTER 5
3D HOLOGRAPHIC PROJECTION TECHNOLOGY TYPES
There are the following categories about the holographic projection
technology broadly:
In Massachusetts, a 29-year-old and technology graduate, called Chad Dyne
invented an air projection and interactive technology, which is a milestone of the
display technology, and it can wall project images with interactive features in the
airflow. The technology is the principle of the mirage, and the image is projected on
the water vapor, and it can form images the strong level and three-dimensional sense
on the molecular vibration is not balanced.
Science and Technology, the Japanese company, had invented the 3D images by
the laser beam projecting the entity. This technique is that the mixed gas of nitrogen
and oxygen, when they disperse in the air, becomes the hot syrupy substance, and
forms a transient 3D image in the air. This approach is achieved by a small blasting
constantly in the air.
The researchers in the Innovation and Technology Institute, University of South
California, announced that they successfully developed a 360-degree holographic
display, and this technique is that the images are projected on a high-speed rotating
mirror, which achieve the three-dimensional images.
A pseudo-holographic projection is applied in commercial purposes, which has
two categories: the projector directly is rear projection on holographic projection
membrane, and the other, a projector or other display light is refracted 45 degrees
imaging in the holographic projection on the phantom, which imaging results are
relatively bright and dazzling, but the cost is relatively much higher and the site
constraints are also more.

CHAPTER 6
WORKING OF HOLOGRAM
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
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; this is to avoid the noise interference caused by other
light sources.
The recording of hologram is based on the phenomenon of interference. It
requires a laser source, a plane mirror or beam splitter, an object and a photographic
plate. A laser beam from the laser source is incident on a plane mirror or beam
splitter. As the name suggests, the function of the beam splitter is to split the laser
beam. One part of splitted beam, after reflection from the beam splitter, strikes on the
photographic plate. This beam is called reference beam. While other part of splitted
beam (transmitted from beam splitter) strikes on the photographic plate after suffering
reflection from the various points of object. This beam is called object beam.
The object beam reflected from the object interferes with the reference beam
when both the beams reach the photographic plate. The superposition of these two
beams produces an interference pattern (in the form of dark and bright fringes) and
this pattern is recorded on the photographic plate. The photographic plate with
recorded interference pattern is called hologram. Photographic plate is also known as
Gabor zone plate in honour of Denis Gabor who developed the phenomenon of
holography.
Each and every part of the hologram receives light from various points of the
object. Thus, even if hologram is broken into parts, each part is capable of
reconstructing the whole object.

There are two basic types of holograms:
 Reflection holograms
 Transmission holograms
Reflection holograms form images by reflecting a beam of light off the surface
of the hologram. This type of hologram produces very high quality images but is very
expensive to create.
Transmission holograms form images by transmitting a beam of light through
the hologram. This type of hologram is more commonly seen since they can be
inexpensively mass-produced. Embossed holograms, such as those found on credit
cards, are transmission holograms with a mirrored backing.
6.1 REFLECTION HOLOGRAMS
6.1.1 Recording of Reflection Holograms
The laser provides a highly coherent source of light. The beam of lighthits the
beam splitter, which is a semi-reflecting plate that splits the beam into two: anobject
beam and a reference beam.The object beam is widened by a beam spreader and the
lightis reflected off the object and is projected onto the photographic plate.The
reference beam is also widened by a beam spreader and the light reflects off a mirror
and shines on the photographic plate as shown in the Fig.6.1.
Fig.6.1. Recording of Reflex holograms

The reference and object beams meet at the photographic plate and create the
interference pattern that records the amplitude and phase of theresultant wave as
shown in the Fig.6.2.
Fig.6.2. Image recording of Reflection hologram
6.1.2 Reconstructing of Reflection Holograms
A reconstruction beam of light is used to reconstruct the object wave front.
The reconstruction beam is positioned at the same angle as the illuminating beam that
was used during the recording phase.The virtual image appears behind the hologram
at the same position as the object as shown in the Fig.6.3.
Fig.6.3. Image reconstruction of Reflection hologram

6.2 TRANSMISSION HOLOGRAMS
6.2.1Recording of Transmission Holograms
As with reflection holograms, a laser is used to provide a highly coherent
source of light. A beam splitter and beam spreaders are also used in the recording of
transmission holograms.After the object beam passes through the beam spreader, the
light is reflected off a mirror and onto the object. The object beam is then reflected
onto the photographic plate.The reference beam is also reflected off a mirror and
shines on the photographic plate.The incoming object and reference beams create a
resultant wave. The amplitude and phase of the resultant wave is recorded onto the
photographic plate as an interference pattern as shown in the Fig.6.4.
Fig.6.4. Image recording of Transmission hologram
6.2.2 Reconstructing of Transmission Holograms
A reconstruction beam is used to illuminate the hologram and is positioned at the
same angle as the reference beam that was used during the recording phase.When the
reconstruction beam is placed at the right angle, three beams of light will pass through
the hologram.An undiffracted beam (zeroth order) will pass directly through the
hologram but will not produce an image.A second beam forms the primary (virtual)
image (first order) that is diffracted at the same angle as the incoming object beam
that was used during recording.A third beam forms the secondary (real) image (first
order).As we can see in the Fig.6.5., the beams that form the images are diffracted at

the same angle, from the undiffracted beam. Between the image beams, the angle is
twice as large.
Fig.6.5. Image reconstruction of Transmission hologram
If we look at the hologram at the same angle as the primary image beam (also
same angle as recording object beam), we will see a virtual image of the object
located behind the hologram as shown in the Fig.6.6.
Fig.6.6. Image reconstruction, primary image
If we look at the hologram at the same angle as the secondary image beam, we
will see a real image of the object located in front of the hologram as shown in the
Fig.6.7.
Fig.6.7. Image reconstruction, secondary image

CHAPTER 7
WORKING OF 3D HOLOGRAPHIC PROJECTION
TECHNOLOGY
This is entirely a Latest and vary unique Hi Definition 3D Projection
Technology in which a person is captured in 3Ddimentional Aspect with a Sp. Hi
Definition Camera on a specially built stage And Projected “As Is” at various Distant
Locations “At a Time”. Viewers at the other end will feel the presence of REAL
Person in front of them and also interact with projected „Virtual” person, without
wearing any kind of 3D glasses, as they interact with „Actual Person‟.
Holography is a technique that enables a light field, which is generally the
product of a light sources scattered off Objects, to be recorded and Later reconstructed
when the original light field is no longer present, due to the absence of the original
objects. Holography can be thought of as somewhat similar to sound recording,
whereby a sound field created by vibrating matter like musical instruments or vocal
cords, is encoded in such a way that it can be reproduced later, without the presence
of the original vibrating matter. It starts with the patented foil, completely invisible to
the naked eye.Right at 45° across the stage and the bounce content off a projector
screen. This is then reflected upwards, reflects off the foil and gives s the impression
of a real 3D volumetric image on stage. A hologram is recorded by exposing a light-
sensitive sensor (for example, photographic film, or a high-resolution CCD)
simultaneously to a coherent beam of light and the reflection of that beam of light
from the scene being recorded. The sensor records not an image of the scene, but the
interference (typically taking place at the surface of a sheet of film) between the
image and the original coherent light. This interference pattern contains all the
information in the light field at the sensor.

Fig.7.1. Recorded hologram from coherent beam of light
To play back a hologram, the interference pattern of the original hologram is
reproduced, and a coherent beam of light (typically having the same wavelength as
the original laser illumination source) is directed onto the pattern along the same
direction as was the reference beam. The reconstruction beam is diffracted from the
interference pattern, and thereby reproduces the 3D image information of the subject
of the hologram. For us, a glowing but seemingly solid image suddenly appears
floating in space.
Fig.7.2. Appearance of Virtual Image through reconstructed waveforms
With video displays being of considerably greater value than static 3D picture frames,
a dynamic substitute for photographic film has long been sought, with varying
degrees of success. An active holographic display is based on a spatial light modulator

(SLM), a device that changes the intensity and/or the phase of a beam of light. A
simple example is an overhead projector, wherein the transparency acts as an SLM.
7.1 DISPLAY SETUP
Display setup need ideally minimum height of 9 ft and footprint of 10 ft
square to show full size human figure.
Fig.7.3. 3D Holographic projection
7.2 COMPONENTS REQUIRED
The primary components of projecting the subject are; A video projector,
preferably DLP with an HD card/minimum native resolution of 1280 x 1024 and
brightness of 5000+ lumens, for smaller cabinet installations, a high quality TFT
Plasma or LCD screen, a hard-disc player with 1920 x 1080i HD graphics card, Apple
or PC video server, DVD player, a specialized foil + 3D set/drapes enclosing 3 sides
and lighting and audio as required and who controller (on site or remote) Subjects are
filmed in HDTV and broadcast on to the foil through HDTV projection systems,
driven by HD Mpeg2 digital hard disc players, or uncompressed full HDTV
video/Beta-Cam players.

CHAPTER 8
ADVANCEMENT IN HOLOGRAPHIC TECHNOLOGY
8.1 TOUCHABLE HOLOGRAMS
The importance of haptic interaction techniques gathers much more attention
with the progress of the computer graphics, the physical simulation and the visual
display technologies. There have been a lot of interactive systems which aim to enable
the users to handle 3D graphic objects with their hands. If tactile feedback is provided
to the user‟s hands in 3D free space, the usability of those systems will be
considerably improved.
8.2 TACTILE DISPLAY WITH HAPTIC FEEDBACK
“Airborne Ultrasound Tactile Display” is a tactile display which provides
tactile sensation onto the user‟s hand. It utilizes the nonlinear phenomenon of
ultrasound; acoustic radiation pressure. When an object interrupts the propagation of
ultra-sound, a pressure field is exerted on the surface of the object.
8.3 USER INTERFACING INTEGRATED DISPLAYS
While camera-based and marker-less hand tracking systems are demonstrated
these days, we use Wiimote (Nintendo) which has an infrared (IR) camera for
.simplicity. A retro reflective marker is attached on the tip of user‟s middle finger. IR
LEDs illuminate the marker and two Wiimotes sense the 3D position of the finger.
Owing to this hand-tracking system, the users can handle the floating virtual image
with their hands.
8.4 360-DEGREE 3D SYSTEM
The system was made possible by projecting high-speed video on a spinning
mirror. As the spinning mirror changes direction, different perspectives of the
projected image is shown. The University of Southern California project is more
realistic compared to other holographic attempt.

CHAPTER 9
APPLICATIONS AND FUTURE SCOPE
9.1 MARKETING WITH 3D HOLOGRAPHIC DISPLAY
This world‟s innovative technology can enable observers to see lifelike images
that float deep inside and project several feet in front of a display screen. Dimensional
Studios, a leader in 3D visual display solutions has recently introduced its
unparalleled digital signage in the UK. This world‟s innovative technology can enable
observers to see 3D holographic-like images that float deep inside and project several
feet in front of an LCD or plasma display screen. Its aim is for advertising agencies
and consumer products who wish to catch a huge impact from this new break through
media.
9.2 HOLOGRAPHY IN EDUCATION
Holography being in its infant stage has not being widely used in education.
However, application of holography in education is not new. Although, the distance
of transition was minimal, long distance projection is possible since the images are
transmitted over the internet. Holography differs from video conferencing because the
teacher appears to be in the classroom. While in video conferencing users can easily
notice a screen and a camera.
9.3 HOLOGRAPHY IN ENTERTAINMENT INDUSTRY
When one thinks about holography in the entertainment industry, the movies
Star Trek and Star Wars come into mind. In these movies, people relate with
holograms as they would relate with real human. Although, what people see in these
movies are not real holograms, they depict what a real hologram looks like and future
capabilities of holography. In the musical industry, holography is being used for
concerts. In this case, the musicians can be far away in New York while performing in
several cities around the world. Today, three dimensional television and cinemas are
becoming common, and there is more to come.3D movies in home theatres require

chunky glasses which may be uncomfortable for some people to wear. Also experts
found that viewing 3D television over a long period can cause headache and eye strain
due to new sensory experience. Since holography makes beamed image look like real,
it should not have any future strain on the eyes nor generate headache.
9.4 PROJECTION DISPLAYS
Future colour liquid crystal displays (LCD‟s) will be brighter and whiter as a
result of holographic technology. Scientists at Polaroid Corp. have developed a
holographic reflector that will reflect ambient light to produce a white background.
Holographic televisions may be possible within a decade but at a high price. MIT
researchers recently made a prototype that does not need glasses, but true holographic
commercial TV will take a year to appear. One day all TVs could be holographic, but
will take 8-10 years. In future, holographic displays will be replacing all present
displays in all sizes, from small phone screen to large projectors

CHAPTER 10
ADVANTAGES OF HOLOGRAPHIC PROJECTION
The interest in 3D viewing is not new. The public has embraced this
experience since at least the days of stereoscopes, at the turn of the last century. New
excitement, interest, and enthusiasm then came with the 3D movie craze in the middle
of the last century, followed by the fascinations of holography, and most recently the
advent of virtual reality. Recent developments in computers and computer graphics
have made spatial 3D images more practical and accessible. Modern three
dimensional (”3D”) display technologies are increasingly popular and practical not
only in computer graphics, but in other diverse environments and technologies as
well. A concurrent continuing need is for such practical auto stereoscopic 3D displays
that can also accommodate multiple viewers independently and simultaneously.
A particular advantage would be afforded if the need could be fulfilled to
provide such simultaneous viewing in which each viewer could be presented with a
uniquely customized auto stereoscopic 3D image that could be entirely different from
that being viewed simultaneously by any of the other viewers present, all within the
same viewing environment, and all with complete freedom of movement therein. A
high resolution three dimensional recording of an object. Another feature is that these
are glasses free 3D display. This 3D technology can accommodate multiple viewers
independently and simultaneously, which is an advantage no other 3D technology can
show. The 3D holographic technology does not need a projection screen. The
projections are projected into midair, so the limitations of screen are not applicable for
3D holographic display

CHAPTER 11
CONCLUSION
Holography may still be in its infant stage, but its potentials applications are
aspiring. Holographic Technology and Spectral Imagining has endless applications, as
far as the human mind can imagine. Holography being the closest display technology
to our real environment may just be the right substitute when reality fails. With
holography, educational institutions may become a global village sooner that people
thought, where information and expertise are within reach. Knowledge sharing and
mobility will only cost a second and learning will become more captivating and
interactive. First, there is an urgent need to address the infrastructural deficiencies
limiting the application of holography in education.
More interestingly, the display medium of holography is very important. A
360 viewing angle is especially what is needed to maximize the use of holography in
education. Being able to display a 3D hologram in free air is also vital, because
interacting with holograms in a covered display may be cumbersome. In order not to
limit the use of holography to a non-interactive display medium, incorporation with
feedback technologies is mandatory. The haptic technology which makes it possible
to touch and manipulate virtual object is especially important. As the field of
hapticscontinues to grow and integrates with holography, interaction with holograms
becomes limitless. In future, holographic displays will be replacing all present
displays in all sizes, from small phone screen to large projectors.

REFERENCE
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[2] Thomas J. Naughton; “Capture, processing, and display of real-world 3D
objects using digital holography”; 2010 IEEE Invited Paper.
[3] Takayuki Hoshi, Masafumi Takahashi, Kei Nakatsuma; “Touchable
Holography”; The University of Tokyo; 2009.
[4] Stephan Reichelt, Ralf Haussler, Norbert Leister, Gerald Futterer, Hagen
Stolle and Armin Schwerdtner; “Holographic 3-D Displays - Electro-
holography within theGrasp of Commercialization”; Advances in Lasers and
Electro Optics (April 2010).
[5] “3D Holographic Projection – The Future of Advertising”, Article Base 2009,
viewed 9 Jun 2013.
[6] Wang Liming. “Three-dimensional graphics appliance in electrocardiogram
“[J].Network Information, 2006, (6):41-42.
[7] Wu Guoliang. “Research of stereo display algorithm in the virtual reality
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3D Holographic Projection Technology

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