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Holography: Do you see what I see?

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Holography: Do you see what I see? Shawn Kennedy Word Origin Hologram is from the Greek word holos, meaning whole and gramma meaning message. Hologram History Theory ... – PowerPoint PPT presentation

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Title: Holography: Do you see what I see?


1
HolographyDo you see what I see?
  • Shawn Kennedy

2
Word Origin
  • Hologram is from the Greek word holos, meaning
    whole and gramma meaning message.

3
Hologram History
  • Theory Developed in 1947 by British/Hungarian
    scientist Dennis Gabor
  • Developed because he was trying to improve the
    resolution of electron microscopes
  • Development in this field was stifled during the
    1950s because light sources were not coherent

4
Coherent Light and a Solution
  • Coherent light is light that is monochromatic and
    of a single wavelength
  • In 1960, the invention of the laser overcame the
    non-coherent light problem

5
History Continued
  • In 1962 Emmett Leith and Juris Upatnieks realized
    that holography could be used as a 3-D visual
    medium
  • From their work, they used a laser to create the
    first hologram in history, that of a toy train
    and bird
  • This type of hologram required laser light to be
    viewed, though.

6
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7
White Light and High Speed Objects
  • In 1962 Dr. Uri Denisyuk of the former U.S.S.R.
    developed a white light reflection hologram,
    which could be viewed in light from a normal
    incandescent bulb.
  • In 1960, with the invention of the pulsed-ruby
    laser, holograms of high speed objects was made
    possible

8
Pulsed-Laser Holography
  • Laser system emits a very powerful burst of light
    that lasts only a few nanoseconds, which
    effectively freezes movement
  • Enables a hologram to be made of a human
  • The first hologram of a person was made in 1967

9
Dr. Dennis Gabor
  • 18 x 24 portrait
  • Recorded in 1971
  • Paved the way for pulsed holographic portraiture
  • Portrait commemorated Gabor winning the Nobel
    Prize that year

10
Dr. Stephen A. Benton
  • Dr. Stephen A. Benton invented white-light
    transmission holography in 1968.
  • This type of hologram can be viewed in ordinary
    white light creating a rainbow image from the
    seven colors making up white light.
  • His work made possible the mass production of
    holograms using an embossing technique.

11
The Integral Hologram
  • This type of hologram was invented by Lloyd Cross
    in 1972.
  • It combines white light transmission holography
    with conventional cinematography to produce
    moving 3-D objects.
  • 2-D motion picture footage of a rotating subject
    are recorded on holographic film, which when
    viewed is processed by the brain in 3-D

12
The Photo Polymer
  • This type of hologram developed by the Polaroid
    Corporation for mass production
  • This is a reflection hologram that can be viewed
    in normal room light.
  • The Mirage hologram is the most famous hologram
    of this type.

13
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14
How Holograms are Made
  • Need a laser, lenses, mirror, photographic film,
    and an object
  • The laser light is separated into two beams,
    reference beam and object beam
  • Reference beam enlarged and aimed at a piece of
    holographic film

15
Making Holograms
  • Object beam directed at subject to be recorded
    and expanded to illuminate subject
  • Object beam reflects off of object and meets
    reference beam at film
  • Produces interference pattern which is recorded

16
Making Holograms Cont.
  • Film is developed
  • Hologram illuminated at same angle as reference
    beam during original exposure to reveal
    holographic image

17
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19
Recording of Types of Holograms
20
Physical Concepts
  • Lloyds Mirror
  • Reflection
  • Light Wave Interference and Diffraction

21
National Geographic
  • First major publication to put a hologram on its
    cover
  • March 1984 issue carried nearly 11 million
    holograms around the world

22
Applications of Holography
  • Design of containers to hold nuclear materials
  • Credit cards carry monetary value
  • Supermarket scanners
  • Optical Computers
  • Improve design of aircraft wings and turbine
    blades
  • Used in aircraft heads-up display
  • Art
  • Archival Recording of fragile museum artifacts

23
Holography in the Future
  • Medical Purposes
  • Gaming Systems
  • Personal Defense
  • Computers
  • Artwork
  • Amusement Park Rides

24
Holography goes Hollywood
  • Holodeck from Star Trek Holodeck Clip
  • Star Wars Chess Game
  • Body Double in Total Recall
  • The Wizard in Wizard of Oz
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