The document discusses holography technology, providing an introduction, timeline, explanation of how holograms work, and their applications. Holography involves using lasers to record the light field scattered from an object, allowing its three-dimensional image to be reconstructed when the original object is no longer present. Key steps in the holography process include recording the interference pattern of an object beam and reference beam, and then reading the hologram by illuminating it with a reference beam to reconstruct the image in three dimensions without glasses. Applications of holography include advertising, education, entertainment, and medicine.

1. CMR ENGINEERING COLLEGE
(UGC Autonomous)
Kandlakoya (V), Medchal (M & Dist). T. S-501401
Department of Electronics and Communication Engineering
Technical Seminar Presentation
On
HOLOGRAPHY TECHNOLOGY

2. Contents
 Introduction
 Timelines of Holography
 What is Holography
 Working of Holography
 Reading a Hologram
 Recording a Hologram
 Advantages
 Applications
 Conclusion
2

3. Introduction
• A holography originated from the Greek word “HOLO”
means COMPLETE and “GRAPHY” means WRITING
.Thus it is a technique to record the complete picture of
an object.
• Technical term for holography is wave front
reconstruction.
• Image changes as the position and orientation of the
viewing system changes.
• Records phase of the object.
• Record our three dimensional
world on a two dimensional
recording medium. 3

4. Introduction to Holography
• Can be seen using naked eyes
• Demonstrates complete parallex and depth-of-fiels
• Image floats in free space
• Can also be used to optically
store , retrieve and process
information
4

5. Timeline of
Holography
1947:Dennis Gabar developed the theory of holography
1960:Pulsed ruby laser was developed
1962:White light reflection hologram
1983:Mastercard first credit card to use hologram
2009:Interactive holographic displays developed
2010:Development of moving 3D holography
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6. What is holography?
Holography is technique that enables a light field which is
generally a product of light source scattered of object to be
recorded and later reconstructed when a original light field is no
longer present , due to absence of original objects.
The overall process requires :-
• Coherent light beam
• Shutter
• Beam Splitter
• Mirror
• Photographic Plate
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7. Working of Holography
Working of Holography is divided into two Phases
• Recording
• Reconstructing
Components Required
• Laser
Usually helium-neon(HeNe) lasers are used
• Beam splitter
Device that uses mirrors and prisms to
split laser beam.
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8. There are two beams
1)Object beam
2)Reference beam
• Mirrors
Direct the beams of light to the correct locations.
• Holographic film
Can record light at a very high resolutions.
Layer of light-sensitive compounds on a transparent
(Silver Halide Photograhicv Emulsion )
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9. Reading a Hologram
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10. A Hologram is the result of interference
occurring between two waves,
An object beam which is the light
scattered off the object & a coherent
background,
The reference beam, which is the light
scattered off the object & a coherent
background , the reference beam, which is
the light reaching the photographic plate
directly.
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11. Recording a Hologram
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Fig: Experimental set-up for recording transmission
hologram

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Fig:2D interference pattern cased by two point source of waves of constant frequency . Each
of the waves is moving away from its source at the same constant speed

13. Advantages
 A high resolution 3D images
 Glasses free 3D display
 No need for projection screen
 Life like images
 Interactive display
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14. Applications
Real world applications are endless
 Advertising
 Gaming
 Education
 Entertainment
 Training
 Medical
 Military and Space Applications etc..
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15. CONCLUSION
• Rapidly growing technology.
• Project large scale , high resolution images onto free space.
• Accommodate multiple viewers independently and
simultaneously.
• Create tremendous effects on all fields of life including business
, education science , art and healthcare.
• Enabling viewing and manipulation of virtual 3D objects in 3D
space without the need for special viewing goggles or headgear.
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