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  • 00:00:02,820 --> 00:00:05,760 We've all seen holograms, and what makes it special

  • is its three-dimensional nature, which

  • is much different than a perspective

  • change on a photograph.

  • We call many things holograms, but many are not.

  • For example, many 3D projections,

  • such as when they brought back Michael Jackson,

  • is just a optical illusion where it's

  • a projection of that individual.

  • This is something we call Pepper's ghost.

  • I'm here offering an IAP course here at MIT

  • called Hands-On Holography.

  • We cover geometrical optics.

  • We cover the electromagnetic spectrum.

  • We generate our own optical holograms as well as

  • audio holograms, and we get into computational holograms

  • as well.

  • A big takeaway from this class is really

  • understanding the wave mechanics of light

  • and the electromagnetic spectrum.

  • If we look at the two words in a hologram,

  • it means "whole writing."

  • And we take into account a special nature

  • of light, which we call phase, and recorded it on a film plate

  • using an interference pattern to recreate an entire scene

  • in its entirety.

  • People think of anything that appears three dimensional to be

  • a hologram, but if it doesn't contain that phase nature,

  • it is not a hologram.

  • We have individuals ranging from art majors to engineers.

  • We've even had some MIT staff themselves take this course.

  • And we try to really give a intuitive feel for what

  • is going on with holograms and interference patterns

  • in general.

  • I'm an optical engineer.

  • I enjoy the wave nature of light.

  • What makes holography really special

  • is that we're able to extract that phase

  • nature and that extra information and make use of it.

00:00:02,820 --> 00:00:05,760 We've all seen holograms, and what makes it special

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B2 US holography hologram nature optical phase electromagnetic

Hands on Holography

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    jbsatvtac1 posted on 2019/08/22
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