Transparent screens just aren’t very practical these days — bigger models are frequently expensive and bulky, while smaller heads-up displays tend to have very narrow viewing angles. However, MIT may have solved all those problems at once with its prototype nanoparticle display. The device creates color images on a glass surface simply by ‘tuning’ a silver nanoparticle coating until it lets only certain light wavelengths pass through. The technique is both cheap and compact, since it requires little more than the coating and some off-the-shelf projector technology. There’s also no need for beam splitters or mirrors, so you can see the picture from just about any angle.
via Engadget
