Hologram Technology

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Hologram Technology
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What is a 3D hologram

• A 3D hologram is defined as a 3D projection that
  exists freely in space and is visible to everyone
  without the need for 3D glasses

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To display a 3D hologram

• Three things are usually required to display a 3D
  hologram.
• A hologram projector
• A 3D hologram
• A real object or product

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History of holography

• 1947 Dennis Gabor developed the
  theory of Holography
• 1960 Pulsed ruby laser development
• 1962 White light reflection
  hologram
• 1983 Master card first credit card
  to use hologram
• 2009 Interactive holographic
  display
• 2010 Moving 3D Holograms developed

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The Transmission Hologram

• The coherent light from the laser is split to
  form two beams an object beam and a reference
  beam.
• The light from the illuminated object and the
  reference beam form an interference pattern  on
  the film.

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The Transmission Hologram

• This pattern hologram contains the information
  about the object which can then be viewed as
  a three dimensional image.

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Viewing a Transmission Hologram

• The image is captured in the  interference
  pattern on the film.
• The image can be reconstructed for viewing by
  shining the coherent light of a  laser on the
  hologram.

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Viewing a Transmission Hologram

• The eye is focused behind the film to see the
  image suspended in space which shows the
  unique characteristics of holographic images.
• The diverged laser beam should be placed in the
  same orientation with respect to the film as the
  reference beam which was used to make the
  hologram.

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Viewing a Transmission Hologram

• Then the image will be seen in the same position
  as the original object with respect to the film.
• It is as if the light from the object was frozen
  in the film, and then continues to your eye when
  reconstructed with the laser light.

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Recording a hologram
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Reconstructing a hologram
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Applications

• Art
• Data storage
• Dynamic holography
• Hobbyist use
• Holographic interferometry

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Applications

• Interferometric microscopy
• Sensors or biosensors
• Security
• Other applications

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See videos here http//fractal.ae/holograms/