Holovectic

It explains it reasonably well on the kickstarter page. They discuss 'modified air' and it clearly looks like they pump out air in a pattern perhaps using propeller(s) and the dust in the air is sufficient (or needs 'enhancing' ; ) to scatter light when the laser is directed in the correct position. It doesn't take much dust to produce a visible reflection.

So I think basically it consists of motors or other electromagnetically operated mirrors directing the laser beam, and some clever air directing mechanism.

You can see the limitations of the system in the video (the images need to be tiny and projected close to the air pumping unit, otherwise they start looking heavily distorted).

shabaz is correct about the technology here so I will not add in that direction. But a Raspberry Pi and certainly not the Arduino do not have the processing power to do the large 1 billion pixel plus and 50 frames a second refresh rate even with the video core IMHO. This requires a hefty amount of pixel/data movement plus a fair amount of processor like a x86 or MIPS  most likely. Just a note here the limit of 100 vectors implies some physical constraint. Interesting idea, but a bit early for wide adoption at this point in time.

Clem

I think you have the wrong end of the stick. You are describing a three dimensional scanning system. The device described is a vector drawing system, presumably with piezoelectric transducers operating mirrors to direct the laser beam rather than slow electromagnetic devices. That would explain the relatively small images. Some (2D scanning) video projectors have used a similar principle for over a decade with a large array of mini-mirrors to control the pixels.

In the shot of the cube display, you can see the faint lines from the projector lens to the vector points (@ 25s). You can see the laser reflecting off of the dust in the air in parts of the video. I suppose you could say it works by smoke and mirrors!

What I cannot explain is the method of concentrating the light reflected at a specific distance from the 'projector'. The inventor says that there is an air flow from the black box across the projector lens and this 'controls air within a box shaped section of  space to precisely modify the refractive index within specific regions to refract and reflect a laser beam'. At 2m 52s you can see an assistant disrupt the air flow from the black box and this disrupts the projected image.

The video also reveals it is driven by an Intel Edison (@ 1m28s). I assume the Quark drives the 'servos' and the Atom does the math and the man-machine interface.

Edison Processing Power

22 nm Intel SoC that includes a dual-core, dual-threaded Intel Atom CPU at 500 MHz and a 32-bit

Intel Quark microcontroller at 100 MHz.

I would have thought a Pi 3 and an Arm based Arduino would beat that for performance except for inter-processor communication speed.

Had not seen the video, but my assumption is right on for x86!

Clem

PS I did not specify the vectoring versus 3d scanning. If you implied one over the other, you read more into this than I mean in my statementst.