PAPER PRESENTATION

3D-Holographic-Projection-Technology

RAMACHANDRA COLLEGE OF ENGINEERING

ELURU

ELECTRONICS AND COMMUNICATION DEPARTMENT

Presented by

D.Satyanarayanarao AbdulRaheem satyanarayana1456@gmail.com raheem.smiley@gmail.com

Abstract:

This is a new HD Projection Technology in which a person is captured in 3D aspects with a special HDCamera 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 the projected ‘Virtual”Person, without wearing any kind of 3D glasses, as they interact with ‘ActualPerson’. >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

Types in holograms:

(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 multicolor holograms, makes images optically indistinguishable from the original objects 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 isIlluminated by a “spot” of white incandescent light, held at a specific angle and distanceand located on the viewer’s side of the hologram. Thus, the image consists of lightReflected by the hologram. Recently, these holograms have been made and displayed in color  — Their images optically indistinguishable from the original objects. If a mirrors the

object, the holographic image of the mirror reflects white light

(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.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 hologramAnd the image is transmitted to the observer’s side. The virtual image Can be very sharpened 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.

(C)Computer-generated holograms >No need for a real object>Interference pattern is calculated digitally, using algorithms

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.

How does a hologram works:>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

Projection of multicolor holographic video:

Video hologram is coded into light modulators

These light modulators are illuminated by coherent light beam source, to project video

This picture represents the projection 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. By using the above technique the videos are made I movie like torn This is shown in the above figure Construction of hologram:

Reconstruction of hologram:

Basic tools required to make a hologram includes a red lasers, lenses, beam splitter, mirrors and holographic filmHolograms are recorded in darker environment

Advances in technology:

Touchable holograms Tactile holographic display with haptic

feedback Horizontal 360º view of a image on

table top User interfacing integrated displays

Tactile display with haptic feedback“Airborne Ultrasound Tactile Display [Iwamoto et al. 2008]” is a tactiledisplay 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.User interfacing integrated displaysWhile 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 thetip of user’s middle finger.IR LEDs illuminate the marker and two Wilmot’s sense the 3D position of the finger. Owing to this hand-tracking system, the users can handle the floating virtual image with their

hands.

APPLICATIONS OF HOLOGRAMS&IT’S 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

Marketing with 3D holographic displayThis world’s innovative technology can enable observers to see lifelikeImages 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 itsUnparalleled digital signage in the UK. This world’s innovative technology can enableObservers 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 mediaHolography in educationHolography 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

Projection displaysFuture colour liquid crystal displays (LCD’s) will be brighter and whiter asa result of holographic technology. Scientists at Polaroid Corp. have developed aholographic reflector that will reflect ambient light to produce a whiter 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 trueholographic commercial TV will take a year to appear. One day all TVs could beholographic, but will take 8-10 years. In future, holographic displays will be replacingall present displays in all sizes, from small phone screen to large projectors

Holographic checkpoint for military, battlefield simulations

Intense real gaming rooms

Conclusion: 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

References:

• “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

• www.Wikipedia.com• www.google.com