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.
Introduction to Multilingual Retrieval Augmented Generation (RAG)
seminar-Hologram.pptx
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
PRESENTATION TITLE 5
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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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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12. 12/23/2022 PRESENTATION TITLE 12
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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