“Real 3D images” using laser plasma
by DJ Neawedde | 25th August 2006
The National Institute of Advanced Industrial Science and Technology (AIST) and Keio University in Japan, in collaboration with Burton Inc., have succeeded in the experimental fabrication of a device displaying “real 3D images” which consist of dot arrays in space where there is nothing but air.Most of the 3D displays reported until now draw pseudo-3D images on 2D planes by utilizing the human binocular disparity. However, many problems occur, e.g., the limitation of the visual field, and the physiological displeasure due to the misidentification of virtual images.
The laser light source used is a high-quality and high–brightness infrared pulsed laser (repetition frequency of pulse: approximately 100 Hz), by which plasma production can be more precisely controlled, enabling brighter and higher contrast image drawing. In addition, the distance between the device and drawing points can be greatly extended (several meters).
The emission time of the laser pulse light is a nano-second (10-9 sec). The device uses 1 pulse for each dot to that the human eye can recognize plasma emission by utilizing the after-image effect, and enables a 100 dot/sec display.
Watch video below.
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[…] AIST of Japan also created real 3D images using laser plasma. […]
August 30th, 2006 at 2:32 am
[…] Although this is pretty neat, it’s not a true 3D display, as SCI FI Tech states, “in the video it looks to me like the video is really 2D and is just viewable from any angle. That’s not quite 3D, where you would see the back of the object if you walked behind it.” […]
November 2nd, 2006 at 3:18 pm
[…] The Japan National Institute of Advanced Industrial Science and Technology (AIST) has improved the functionality of their 3D projector shown back in 2006 (video). The 3D projector uses focused laser beams creating flashpoint “pixels” in mid-air. These are generated as the focused lasers heat the oxygen and nitrogen molecules in the air, “causing them to spark in a phenomenon known as plasma emission. By rapidly moving these flashpoints in a controlled fashion, the projector creates a three-dimensional image that appears to float in empty space.” […]
July 17th, 2007 at 3:18 pm