The holographic image at the heart of the next virtual reality headsets

Researchers have developed holographic glasses that could revolutionize virtual reality. At just 2.5 millimeters thick, they could pave the way for simple, lightweight, and comfortable VR glasses to wear all day.

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Technology is taking up more and more space in our lives. It affects all areas. Whether in health, transport, energy, environmental protection and many other areas, it is omnipresent. In partnership with EDF Pulse, Futura-Sciences brings together for you through Planète Progrès a concentrate of these advances in video.

One of the main flaws of current virtual reality headsets is the size of the devices. They are bulky and heavy, making them quite inconvenient to carry for long periods of time. Most use lenses of Fresnel, which impose a minimum distance between theEye and screen and sufferchromatic aberrations. More and more manufacturers rely on pancake optics. This allows the creation of thinner devices, but the image is less bright and the field of view more reduced.

Nvidia has worked with Stanford University researchers to develop a third option that could revolutionize things VR headsets and allow you to wear them comfortably all day long. They created glasses holographic with a thickness of only 2.5 millimeters and a weight of only 60 grams.

A hologram in front of each eye

Their system consists of a waveguide, a spatial modulator of bright (SLM) and what might be translated as “geometric phase lens” (geometric phase lens). It creates three-dimensional holograms in front of each eye, but can also display two-dimensional images for stereoscopic viewing, such as Virtual Reality Headsets currently.

The prototype looks like a simple pair of glasses that we would have modified glasses. However, it should be noted that it only includes the display and nothing else, and at the moment it has two large unsightly straps that are used to connect it to a computer. It only offers a field of view of 22.8 degrees. However, the researchers point out that reaching 120 degrees (like current helmets) would be fairly easy. This technology seems very promising, but it is still in its infancy. It will certainly be a few more years and several generations of helmets before it comes onto the market.

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