Technology of Holographic Projection

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Submitted To:
Ms Poonam Kshtriya
Submitted By:
Bhanupriya Tanwar
Roll NO:13851

Content
1. What is Holography
2. History of Holography
3. Conventional Photography
4. 3D Display
5. Why Holography
6. Types of Holograms
7. Properties of Hologram
8. Working of Holography
9. Applications
10. Advantages
11. Limitations

What is Holography
•Holography is the science of producing holograms.
•Based on recording patterns of light. These patterns are
reproduced as 3D image called Hologram.
•Hologram is composed of two Greek terms Holos – “whole
view” and Gram – "writing or drawing“
•It is an advanced form of photography

History of Holography
• Holographic Technology Invented in 1947
by Dennis Gabor before the invention of
the laser.
• Dennis Gabor is known as the Father of Holography and
Holographic Technologies.
• Leith and Upatnieks (1962) applied laser light to holography.
• In 1971 Gabor received Nobel Prize.

Conventional Photography
• 2-d version of a 3-d scene.
• Photograph lacks depth perception.
• Film sensitive only to radiant energy.

3D Display
•Narrow view angles.
• Require viewing glasses.
• Not true 3D because they are stereoscopic.

Why Holography
•A high resolution three dimensional image of an object.
•Glasses free 3D display .
•360 degree view of holographic image.
•No need for projection screen.
•Live images.
•Interactive display .

Types of Holograms
1. Transmission holograms
• Object and Reference beam incident on holographic film
from same sides.
•Less expensive in mass production.

Types of Holograms
2. Reflection holograms
• Object and Reference beam incident on holographic film
from opposite sides.
• Produces high quality images.
• Very expensive.

Types of Holograms
3. Computer Generated holograms
• No need for a real object.
• Interference pattern is calculated digitally, using
computer algorithms .

Properties of Hologram
•If we look at the holograms from different angles, we see
objects from different perspectives, just like we are looking at
a real object.
•If we cut hologram in half, each half contains whole views of
the entire holographic image. The same is true with smaller
and smaller pieces.
•If there is any movement while
recording hologram then
holographic film will left blank.

Working of Holography
All physical properties of scene/object is to be recorded and
then regenerated
Holography is two step
process:
First is Recording a hologram
of the object on holographic
plate.
Second is Reconstruction of
image from hologram.

Tools Required to make
Holograms
 Laser : Red lasers, usually helium-neon (HeNe) lasers.
 Beam splitter: This is a device that uses mirrors and
prisms to split one beam of light into two beams:
1) Object beam
2) Reference beam
 Mirrors: direct the beams of light to the correct locations.
 Holographic film: It's a layer of light-sensitive
compounds on a transparent surface. So it Can record light
at a very high resolution
Example: Silver Halide Emulsion

Applications
“Real world applications are endless”

Applications
1. Promotions
2. Education
3. Entertainment
4. Technical Training
5. Religion
6. Military
7. Communication
8. Technology in Space
9. Sport Training
10 . Research

Applications
1. Promotions
2. Education
3. Entertainment
4. Technical Training
5. Religion
6. Military
7. Pilot Training
8. Technology in Space
9. Sport Training
10 . Research

Application
Authentication:Hologram stickers use for security
because they cannot be scanned or photocopied .
Stickers used in:
• Identity cards
• PAN cards
• Debit/Credit card

Future
In future all displays like televisions, mobile phone displays,
projector displays, LED display will be replaced by
holographic displays.

Advantages
• Holography is a high resolution three dimensional image of
scene /object.
• Glasses free 3D display.
• Security: Holograms are widely used for security purpose.
Because it is not possible to duplicate Holograms.
• 360º view of a image.
• No need of projection screen.
• Use to store data and
many more.

Limitations
• Hard to see without good direct point of source of light.
•Sticker Hologram not visible in dark.
•Require large amount of processing.

Conclusion
Holographic Technology is most advanced technology.
Holography technology has endless application ,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. It provide real time live view.
Holographic Technology will became a very integral part of
human societies and civilizations in the future.

Technology of Holographic Projection

Technology of Holographic Projection

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Technology of Holographic Projection