3D Holographic Projection Technology

N NOOR

MOHAMED. J

Contents• What is Holography?

• Why Holography?

• Types of Holograms

• Working of a hologram

• Recording of hologram

• Reconstruction of hologram

• Advances in technology

• Applications & Future scope

• Conclusion

What is holography?

Holography is a technique that allows the light scattered from an object to be recorded and later reconstructed.

The technique is to optically store, retrieve, and process information.

Preserve the 3-D information of a holographed object.

Why holographic display?

A high resolution three dimensional recording of an object

Glasses free 3D display No need for projection screen Life like images Interactive display

Types of Holograms

A.Reflex hologramIlluminated by a spot of

white incandescent light source.

The image consists of light reflected by the hologram.

Makes images optically indistinguishable from the original objects.

Produces multicolor holograms.

B.Transmission hologram Viewed with laser light. Need light source behind

them. Virtual image can be very

sharp and deep.

C.Computer-generated holograms

No need for a real object Interference pattern is

calculated digitally.

Working of a Hologram 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

Recording of hologram Basic tools required to make

a hologram includes; Red lasers Lenses Beam splitter Mirrors and holographic film.

Holograms are recorded in darker environment.

Recording a hologram

• Laser : Coherent red lasers, usually helium-neon (He-Ne)

lasers are common in holography.

• Beam splitter: This is a device splits laser beam of light

into two beams.

Object beam (directed onto the object) and

Reference beam (travels directly onto the recording

medium)

• Mirrors: They focus the beam on the plate.

• Holographic film:

Holographic film can record light at a very high resolution.

It's a layer of light-sensitive compounds on a transparent

surface.

Ex: Silver Halide Emulsion

Process When the two laser beams reach the recording

medium, their light waves interfere with each other. It is this interference pattern that is imprinted on the

recording medium.

HologramRecording

HologramReconstruction

Reconstruction of a hologram

The photographic plate is illuminated with original light source used for recording holograms.

Advances in technology Touchable holograms

Tactile holographic display with haptic feedback

Horizontal 360º view of a image on table top

User interfacing integrated displays

Applications & Future scope

Educational applications Marketing with 3D

holographic display 3D simulation displays for

scientific visualization Improved virtual Reality

and augmented reality

Tele presence and video conferencing

Entertainment displays Military and Space

Applications 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 all displays like televisions, mobile phone displays, projector displays will be replaced by holographic displays.

Thank you

Questions?