nanotubes

TimWilkinson A new type of liquid-crystal device has been fabricated to generate a tunable, graded refractive index across the depth of each pixel. Liquid crystals offer exciting potential for creating real-time high-resolution 3D display systems. A number of attempts have already been made using lenticular flat-panel displays, auto-stereoscopy, and volumetric systems. However, none of these devices have been able to achieve a satisfactory image, either in depth or resolution. For the reproduction of a true 3D image, a fully complex hologram is the ultimate solution but is very difficult to display using current technology, requiring pixel res-olutions beyond what current systems are capable of. Ferroelec-tric liquid-crystal-over-silicon (LCOS) microdisplays have been used to project simple 3D images (see Figure 1). But both the quality and viewing angle of the image are limited by the bi