May I present you the third so called scanner machine.
I developed it in collaboration with three Slowenian companies.
This sistem is a one axis, linear motion, full RGB collor POV. You can upload any kind of image into its flash drive to be shown in resolution of 212 x 212 pixles. Its asinhronos electric motor drive is controled by a frequecy regulator and its RGB LED line achives speed of 4 m/s. It needed to be 13 times faster to see the whole image floating in midair. I used arduino and some code in linux to control a digital camera that has a shutter time of 0.8 s to fully capture the whole image and later on show it on a projector.