Nanostructure Meta-lens to Solve Light Issues in VR

The wavelength of virtual reality is continuously resonating with the vision of future. Nearly every tech is synching with VR tech to make its futuristic space in the immersive world. To examine the wonders of VR technology a well-equipped hardware is required. With the huge spread of this technology manufacturers have to be very cautious about developing headsets used in virtual reality. Light weight devices with sharp imaging are the new challenges for companies. An issue that hinders the way of imaging is the use of conventional lenses made of curved glass. They behave differently with variable wavelength of light, producing blurry effect. To avoid this problem multiple lenses are used in devices ranging from smart phone cameras to heavy image projecting devices but creates heavier, complex and costly products.

A method is devised to focus every color in spectrum at same time with the help of fully translucent, extreme-compact lenses. They are “meta-lenses” and are the special composition of nanostructures. Within a wider spectrum, higher quality delivery of images can be observed through single meta-lens.

To get sharp image results, the glass for required lens is cut into curved shape, polished and cleaned in such a way that it can bend light easily but can’t focus all colors on the same point. Different colors in light have different wavelength so they travel at different speed in a lens. Blurred images are observed because these colors can’t converge at same point after passing through a lens.

SEAS (School of Engineering and Applied Sciences) at Harvard researchers are in the process to use meta-lens tech to enhance the image processing of AR & VR. The same problem occurred for the lens used for both virtual and augmented reality. In VR and AR headsets, to get precision in the aberration of light, a lot of curved thick lenses and materials are used. SEAS researchers explained the new discovery as,

“Meta-lenses have advantages over traditional lenses…Meta-lenses are thin, easy to fabricate and cost effective. This breakthrough extends those advantages across the whole visible range of light. This is the next big step.”  

A regular flat glass with a thickness of 1mm is engineered to substitute old tech. A sheet of rectangular nanostructures, created precisely and carefully, is placed over that plane. The sheet is made of titanium dioxide and is million times thinner than layer of glass. This Nano-tech wonder is a hollow-man to visible light.

The entire spectrum of light with high-resolution can be converged on a single point with the help of meta-lens. This tech will bring a revolution in the field of AR and VR and both the realities are expected to get rid of  weighty headsets.

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