3D hologram projector using Intersecting Lasers

Back in 3rd grade in my G.A.T.E. class we were challenged to write our own books. I decided to make mine about time travel. I had always wondered how 3D hologram projectors like the ones in star wars would actually work. What I came up with was a way to intersect lasers. I was explaining this to a friend last night on the 4th of July and began wondering if someone had actually built it yet. I googled it today and found out some company built one: http://hackaday.com/2010/01/09/ces-3d-laser-projection-system/
 

Yep, I was in 3rd grade and I wrote a sci-fi book about time travel and invented a way to make holographic projectors that actually became a real invention. So because I've been coming up with concepts, ideas, and inventions that consistently come to fruition by other people, I decided to quit sitting on them and start publishing them on my blog. This is exactly what I was explaining to my friend last night.

How it works is that the luminance value of the point where two beams intersect would be brighter than their individual luminance.

Take a laser and have it draw a line. The beam would like a triangle-like surface as seen in a lazer light show. Take another laser and put it at a perpendicular position below the projected beam. Have it draw a circle. It would look like a cone of light. Where the two lasers intersect you would see a circle with a brighter luminance than the cone or the triangle.

Now if you were to take 3 lazers from positions resembling an equilateral triangle sitting on a floor pointing up. The lasers would draw any 3D object by drawing the outline of that object one vertical slice at a time. It would be similar to the way that a 3D printer prints a plastic 3D object by making one slice at a time.

Now when lasers draw complex shapes you start to see a refresh rate depending on the distance the laser has to travel. So, in order to reduce the refresh rate and to also reduce the amount of haze created by the stray beams of light, you would build an array of lasers in the shape of a ring pointing up. The lasers would be able to draw both from the top down and bottom up at the same time as well as you would have more than 3 lasers intersecting at a time so that their luminance could be less visible except for the intersection points that they are drawing. For example if you have a beam of a luminance of 50percent intersecting with another beam of 50percent you get a point of light with a luminance of 100percent lets say. Having an array of lasers means you could have 10 beams at a value of 10percent creating the same intersection point of light with a luminance of 100percent. What this does is it reduces the visibility of the stray laser beam light since the beams are only 10% instead of %50.

In the video, the prototype has a glass cylinder around it. I imagine they did this to stop the stray beams from flying all over the room because they could cause retina damage. Instead the beams are reflected by the cylinder so that they only go up instead of all over the room. Now have the beams alternate their colors as they draw and you have the ability to draw a color object. What I came up with last night was using this technology combined with the kinect camera's ability to record 3D data and map 2D video onto the 3D information. Put 2 kinect cameras at 180degree opposite positions or use an array of them and you have just created a 3D recording device. You would then be able to teleconference in 3D or record your 3D projection. Boom!

Let There Be (laser)Light!

 -MM


***Update***
I saw in a different video that the japanese company uses excited ions suspended in a gas.
Thats prob why they have the glass case.