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Category: holograms – Page 7

From 2021

A new method called tensor holography could enable the creation of holograms for virtual reality, 3D printing, medical imaging, and more — and it can run on a smartphone.

YouTube.

PhD student from MIT’s Department of Electrical Engineering and Computer Science Liang Shi said people once believed that with the existing consumer-grade computer hardware, it’s impossible to do real-time 3D holograms. It’s going to take decades before it would be viable, but he figured out a way to cut that time.

Holographic image is not just made up in the movies, it’s being created as we speak. Shi’s team took a different approach from what was first developed in holograms, where laser beam would split, half the beam is used to illuminate the subject and the other half used as a reference for the light waves phase.

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The novel optical hologram creating method is three orders of magnitude better than the current ways.

Researchers from the University of Science and Technology of China have developed a new method for creating realistic 3D holographic projections, which is three orders of magnitude better than the current state-of-the-art technology.

The study on the ultrahigh-density method for producing realistic holograms was published in the peer-reviewed journal Optica. Led by Lei Gong, the team developed a new approach to holography that overcame some of the long-standing limitations of current digital holographic techniques.

Optica.

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Researchers have developed a new method for creating realistic 3D holographic projections that are three orders of magnitude better than the current state-of-the-art technology. Previous attempts to improve the resolution of holograms have run into three basic roadblocks. However, this new ultrahigh-density method shows that two of those have now been solved, dramatically improving the overall quality, resolution, and appearance of holographic projections.

“Our new method overcomes two long-existing bottlenecks in current digital holographic techniques — low axial resolution and high interplane crosstalk — that prevent fine depth control of the hologram and thus limit the quality of the 3D display,” said Lei Gong, who led a research team from the University of Science and Technology of China. “Our approach could also improve holography-based optical encryption by allowing more data to be encrypted in the hologram.”

Limitations of Current Methods for Generating Holograms.

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face_with_colon_three year 2022.

AdS/CFT Proves Its Usefulness

One of the first uses of AdS/CFT had to do with understanding black holes. Theoreticians had long been grappling with a paradox thrown up by these enigmatic cosmic objects. In the 1970s Stephen Hawking showed that black holes emit thermal radiation, in the form of particles, because of quantum mechanical effects near the event horizon. In the absence of infalling matter, this “Hawking” radiation would cause a black hole to eventually evaporate. This idea posed a problem. What happens to the information contained in the matter that formed the black hole? Is the information lost forever? Such a loss would go against the laws of quantum mechanics, which say that information cannot be destroyed.

A key theoretical work that helped tackle this question came in 2006, when Shinsei Ryu and Tadashi Takayanagi used the AdS/CFT duality to establish a connection between two numbers, one in each theory. One pertains to a special type of surface in the volume of spacetime described by AdS. Say there’s a black hole in the AdS theory. It has a surface, called an extremal surface, which is the boundary around the black hole where spacetime makes the transition from weak to strong curvature (this surface may or may not lie inside the black hole’s event horizon). The other number, which pertains to the quantum system being described by the CFT, is called entanglement entropy and is a measure of how much one part of the quantum system is entangled with the rest. The Ryu-Takayanagi result showed that the area of the extremal surface of a black hole in the AdS is related to the entanglement entropy of the quantum system in the CFT.

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We showcase the Proto infinity wall, the Proto Epic, and the Proto M. Watch and enjoy, or else.

None of this happens without the entire team at Proto. The Protopians are made up of world class engineers, salespeople, resellers, investors, producers, developers, and partners. Without them, Proto is just a good idea. They’re the people who actually make these innovations happen.

Besides California Live on NBC, Proto has also been seen on America’s Got Talent, Ellen, and The Today Show. Proto has racked up 2 Fast Company innovation award wins, Innovation of the year at SXSW, and is a 4x CES winner. Proto is a VC & mega-celebrity backed technology company based in Los Angeles with satellite showrooms and partners in New York, San Francisco, Dallas, Las Vegas, Nashville, Toronto, Brisbane, London, Taipei, Jakarta, Columbus, Milan, Tokyo, Hong Kong, and Seoul.

Want to see a demo? Schedule one here. ProtoHologram.com

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That’s exactly what researchers in Germany set out to do, making use of “acoustic holograms” to form distinct 3D shapes out of particles suspended in water — all in “one shot,” said study lead author Kai Melde, a researcher from the Max Planck Institute, in a press release.

According to a study on the work, published last week in the journal Science Advances, the researchers were able to create a helix and a figure 8 out of silica gel beads, assembled biological cells into spherical clumps, and even provided a compelling concept for forming the shape of a dove in future experiments.

These acoustic holograms work by cleverly manipulating the pressure exerted by high frequency ultrasonic waves via the inexpensive use of a conventionally 3D-printed plate.

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Science fiction films love to show off huge leaps in technology. The latest Avatar movie features autonomous, spider-like robots that can build a whole city within weeks. There are space ships that can carry frozen passengers lightyears away from Earth. In James Cameron’s imagination, we can download our memories and then upload them into newly baked bodies. All this wildly advanced tech is controlled through touch-activated, transparent, monochrome and often blue holograms. Just like a thousand other futuristic interfaces in Hollywood.

When we are shown a glimpse of the far future through science fiction films, there are omnipresent voice assistants, otherworldly wearables, and a whole lot of holograms. For whatever reason these holograms are almost always blue, floating above desks and visible to anyone who might stroll by. This formula for futuristic UI has always baffled me, because as cool as it looks, it doesn’t seem super practical. And yet, Hollywood seems to have an obsession with imagining future worlds washed in blue light.

Perhaps the Hollywood formula is inspired by one of the first holograms to grace the silver screen: Princess Leia telling Obi-Wan Kenobi that he is their only hope. Star Wars served as an inspiration for future sci-fi ventures, so it follows that other stories might emulate the original. The Avatar films have an obvious penchant for the color blue, and so the holograms that introduce us to the world of Pandora and the native Na’vi are, like Leia, made out of blue light.

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Scientists from the Micro, Nano and Molecular Systems Lab at the Max Planck Institute for Medical Research and the Institute for Molecular Systems Engineering and Advanced Materials at Heidelberg University have created a new technology to assemble matter in 3D. Their concept uses multiple acoustic holograms to generate pressure fields with which solid particles, gel beads and even biological cells can be printed.

These results pave the way for novel 3D cell culture techniques with applications in biomedical engineering. The results of the study were published in the journal Science Advances.

Additive manufacturing or 3D printing enables the fabrication of complex parts from functional or . Conventional 3D printing can be a slow process, where objects are constructed one line or one layer at a time. Researchers in Heidelberg and Tübingen now demonstrate how to form a 3D object from smaller building blocks in just a single step.

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