Holograms That Don't Change Color As You Move

An anonymous reader sends this quote from Wired: "By harnessing the power of tiny waves dancing in an electron sea, Japanese physicists have developed a novel way to project holograms that don't change color when you move your head. 'In a conventional hologram, if you change the angle, the color changes,' said optical physicist Satoshi Kawata of Osaka University in Japan. 'Our hologram shows natural color at any angle you observe.' The researchers’ machine takes advantage of how beams of light trigger waves of activity in free electrons, unattached to any atom, arrayed on a metal surface. Called surface plasmons, these waves could be used to blast cancer cells and build ultra-fast computer processors. They also show up in medieval stained glass windows, where plasmons on flecks of gold suspended in the glass make the window change color as the sun sets."

Comments

Re:It's about time..

[Jezza]

The reason 3D *can** cause headaches seems to be because the 3D is fooling the brain into thinking the focus is should be shifted, when the focus is fixed. In "normal" 3D (what we normally perceive) if your gaze moves to an object at a different distance then your eye must refocus to view it. In "artificial 3D" the focus for the whole scene is fixed (it's at the display - even objects that appear further away have their focus at the display surface). This artificially "fixed focus" is at odds with what we normally view and causes headaches. I don't think this will cure that problem.

This is also why images on the new 3DS look "unnaturally clean" - everything is in focus all at once, regardless of depth. This should help, as it is an additional cue that the eye should not refocus. Additionally "dialling back" the 3D effect should also help.