You already know that I&#39;m an engineer

程度副詞

and I&#39;m really passionate about holography.

I believe this will be the technology of the future,

and I would love to talk a little bit more about it.

they usually ask me about Tupac&#39;s hologram

and I&#39;m really sorry to tell you that this is just an optical illusion,

which has nothing to do with true holography.

is that you have a thin sheet of glass that both transmits and reflects light,

so when you look into it you see the people standing behind it,

— research papers, PhD dissertations —

and in fact, I wanted to know a bit more about it.

So I made a Google search — the most popular thing I guess.

that they developed a novel holographic technology

were not making holography in the scientific sense.

Of course these technologies exist and they are quite impressive,

is just a 2D image projected onto a cylindrical surface.

As you walk around, you have the impression

that you are seeing a person from different perspectives

I like to think about holography as playing with light.

And you probably heard somewhere that light is a wave.

I like to imagine the situation by looking at water waves.

it travels outwards in a circular manner,

if you make two ripples at the same time,

that these two waves overlap and form a certain pattern.

where water doesn&#39;t seem to move at all.

And in some places we have a large oscillation.

water waves are quite big and easy to see,

is as small as one hundredth of a human hair,

as fast as 500 billion times [per second].

What does this have to do with holography?

and you can open and closed them in any way you want.

is a sample hologram which is just an array of black and white squares.

Black means a closed slit and white an open one,

Each open slit will create a new small wave

and since there&#39;s loads of these waves

What we are doing here is we&#39;re telling light

that it should appear in certain places but not in others.

I should say a few words about the hologram generation.

As you can guess it&#39;s a pretty complex operation,

you would need a supercomputer to do the calculation

but most of you have a super computer at home.

Graphic cards can do operations much faster than processors

We said something about holograms — how we generate them —

now I&#39;m going to tell you how we display them.

First of all you need a source of light which is laser.

That laser beam illuminates the micro display

and later on we project the image onto the surface,

The angle view depends on the type of lens you use,

and in fact in my research, we use a simple ball of glass,

and I&#39;m going to show you two types of blur,

when the lens is slightly misplaced from its position —

and the other type of blur is called coma

that the point seems to have a tail like a comet.

we use special functions called Zernike Polynomials,

we use a Third Zernike Polynomial which looks like that.

has a Zernike Polynomial associated with it that corrects it.

We need to know an odd proportion to combine the aberrations,

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