2. HOLOGRAM
• A 3D hologram is defined as a 3D projection that exists freely in
space and is visible to everyone
• A 3D hologram displays products, objects, and animated sequences three-
dimensionally and enables seemingly real objects or animations to appear
to float completely freely in space.
3. HISTORY OF HOLOGRAPHY
Holography was invented in 1947 by Hungarian
physicist Dennis Gabor (1900–1979), work for
which he received the Nobel Prize in Physics in
1971.
At the time Gabor developed holography, coherent light sources were not
available, so the theory had to wait more than a decade until its first practical
applications were realized, though he experimented with a heavily filtered mercury
arc light source. The invention in 1960 of the laser, the first coherent light source,
was followed by the first hologram, in 1963, after which holography became
commercially available.
4. TYPES OF HOLOGRAM
• 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.
5. • 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
• Computer-generated holograms
No need for a real object Interference pattern is calculated digitally, using algorithms
• Hybrid Hologram
Between the reflection and transmission types of holograms, many variations can be
made.
6. HOW HOLOGRAMS WORK
• 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
8. 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
9.
10. • Laser : Red lasers, usually helium-neon (HeNe) lasers, are
• common in holography. These are coherent light source.
• • Beam splitter: This is a device that uses mirrors and prisms to
• split laser beam of light into two beams.
• Object beam (directed onto the object) and
• Reference beam (travels directly onto the recording medium)
11. • Mirrors: These direct the beams of light to the correct locations
• • Holographic film: Holographic film can record light at a very high resolution, which is
necessary for creating a hologram. It's a layer of light-sensitive compounds on a
transparent surface, like photographic film.Eg: Silver Halide Emulsion
13. WHAT IS A 3D HOLOGRAM USED FOR?
• 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
19. COLLECTION
• 3D Holographic projection is the new wave of technology that will change how we view
things in the new era. It will have tremendous effects on all fields of life. Holographic
technology and spectral imaging has endless applications, as far as the human mind can
imagine.
• In future all displays like televisions, mobile phone displays, projector displays will be
replaced by holographic displays
