Scientists have presented contact lenses that can work as an augmented reality screen. In this respect informs UNIST University press service.
Augmented reality (AR) is the projection of an image onto a transparent screen in front of a person. This image complements what the user sees (for example, by highlighting important objects), but unlike VR glasses, it does not replace the actual image. The application of such devices in life is hampered by their size and inconvenience of use.
In this context, Korean scientists introduced an AR device in the form of a contact lens. Technically, they are electrochromic screens based on Prussian blue. Such screens consume very little energy, can display blue, white and green colors, but in the basic version they have limitations when displaying words or pictures due to the difficulty of applying an azure micropattern to a contact lens by galvanization. In this regard, the experts replaced the galvanic coating with the printing of microcircuits and imaging on a 3D printer using the hydrostatic meniscus effect. Printed with acid-iron-ferricyanide ink (FeCl3 + K3Fe(CN)6 + HCl), crystallization of a 7.2 micron thick micropattern occurred due to evaporation of the solvent.
The result was a miniature AR screen that could show the user directions to destinations by acquiring real-time GPS coordinates during the experiments.
Previously, unexpectedly, physics opened a new way to capture a microparticle.