Lifeboat Foundation

Metalens for AR and VR.

BEIJING, Sept. 8, 2023 /PRNewswire/ — WiMi Hologram Cloud Inc. (NASDAQ: WIMI) (“WiMi” or the “Company”), a leading global Hologram Augmented Reality (“AR”) Technology provider, today announced that a metasurface eyepiece for augmented reality has been developed, which is based on metasurfaces composed of artificially fabricated subwavelength structures. The metasurface eyepiece employs a special optical design and engineered anisotropic optical response to achieve an ultra-wide field of view(FOV), full-color imaging, and high-resolution near-eye display.

At the heart of the WiMi’s metalens are see-through metalens with a high numerical aperture(NA), a large area and broadband characteristics. Its anisotropic optical response allows it to perform two different optical functions simultaneously. First, it can image virtual information, acting as an imaging lens for virtual information. Second, it can transmit light, serving as a transparent glass for viewing a real-world scene. This design allows the transparent metalens to be placed directly in front of the eye without the need for additional optics, resulting in a wider FOV.

Fabrication of metalens is done using nanoimprinting technology, which is capable of fabricating large-area metalens with sub-wavelength structures. First, a mould or template with the desired structure is prepared. Then, the mould or template is contacted with a transparent substrate and the nanoscale structure is transferred by applying pressure and temperature. Through this nanoimprinting process, the subwavelength structure of the metalens is successfully replicated onto the transparent substrate, resulting in the formation of the metalens.

Continue reading “WiMi Developed Metasurface Eyepiece for Augmented Reality with Ultra-wide FOV” »

From pterodactyls flying overhead in a game to virtually applying cosmetics prior to making a purchase, augmented reality and other immersive technologies are transforming how we play, observe, and learn. Cheap and ultra-small light-emitting diodes (LEDs) that enable full-color imaging at high resolution would help immersive displays reach their full potential, but are not currently available.

Now, in a study recently published in Applied Physics Express, a team led by researchers at Meijo University and King Abdullah University of Science and Technology (KAUST) has successfully developed such LEDs. The simplicity of their fabrication, via presently available manufacturing methods, means they could be readily incorporated into modern metaverse applications.

Why is the development of improved LEDs necessary for immersive reality? The realism of augmented and virtual reality depends in part on resolution, detail, and color breadth. For example, all colors must be evident and distinguishable from one another. Gallium indium nitride semiconductors are versatile materials for LEDs that meet all of these requirements.

The patented product, an AR windshield, utilizes a range of sensors such as visible light cameras and infrared cameras to create a 3D picture of the world.

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More remarkably, the advent of artificial intelligence (AI) and machine learning-based computers in the next century may alter how we relate to ourselves.

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While Apple continues (or doesn’t continue) to develop its plans for a self-driving automobile, the company is proposing an advanced high-end technology for an augmented reality (AR) display system that would generate a bunch of information onto a vehicle’s windshield.

In a U.S. Patent Office filing last week, Apple described a graphical overlay on the glass in front of the driver that would provide information about the real-time environment as well as data about objects in the distance — humans included — along with the vehicle’s speed, suspension and other factors.

The system, which may borrow on Apple’s science being employed in its soon-to-be-released Vision Pro headsets, would rely on a variety of sensors to collect information about the surrounding environment. This could include visible light cameras, various types of infrared cameras, as well as ultrasonic and light-based scanning devices for building up a three-dimensional picture of the car’s surroundings. The patent also mentions the use of geographical positioning devices and radar devices.

Transparent Holographic video glass wall with 4k resolution.
Glimm has made for one of her clients a transparent video wall called as well holographic video wall indoor with holographic content and video s for indoor location.
The video wall exist of 8 panels of 55 inch TOLED displays which we have combined all together and hide the transformers and graphic cards in a small aluminium frame.
The resolution is 4K and the display is of glass in the glass.
Technology explaining :
TOLED stands for Transparent Organic Light-Emitting Diode. It is a display technology that combines the benefits of both OLED (Organic Light-Emitting Diode) and transparent displays.
In TOLED, each pixel of the display consists of a thin layer of organic materials that emit light when an electric current passes through them. These organic materials are sandwiched between transparent electrodes, typically made of indium tin oxide (ITO), which allow light to pass through.
One of the key advantages of TOLED is its transparency. When the display is not actively emitting light, it appears transparent, allowing users to see through it. This property makes TOLED suitable for applications where transparency is desired, such as in heads-up displays, smart windows, or augmented reality devices or in retail designs, advertisement or create a large TOLED video wall or Hologram 2D 3D.
TOLED also offers the benefits of OLED technology, including high contrast ratios, wide viewing angles, and fast response times. The organic materials used in TOLED displays can emit light directly, eliminating the need for a separate back lighting system, which contributes to their thin and lightweight design.
Besides the Transparent OLED technology we produce as well Transparent LED displays or Transparent LCD displays.
How to combine TOLED displays together?
1. Ensure compatibility: Make sure the Transparent OLED displays you are using are compatible with each other in terms of resolution, interface, and electrical requirements.
2. Physical alignment: Align the displays physically to create a larger display area. This typically involves arranging the displays side by side or in a grid formation. Use appropriate mounting brackets or frames to secure them in place.
3. Connection: Connect the displays together using the necessary cables or connectors. The specific connection method depends on the interface supported by the TOLED displays. Common interfaces include HDMI, Display Port, or other proprietary interfaces.
4. Synchronization: If required, synchronize the displays to ensure coordinated content across all the panels. This may involve configuring the displays through software or hardware synchronization methods. Consult the manufacturer’s instructions or documentation for guidance on synchronization options.
5. Display control: Depending on the setup and software capabilities, you may need to adjust display settings, such as resolution, refresh rate, or color calibration, to optimize the combined TOLED display.
6. Content management: Use appropriate software or programming techniques to distribute and display content across the combined TOLED displays. This could involve treating them as a single large display or as individual screens, depending on your requirements.

By following these steps, you can effectively combine multiple TOLED displays to create a larger and visually cohesive display area.

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Researchers have developed an easy-to-build, low-cost 3D nanoprinting system that can create arbitrary 3D structures with extremely fine features. The new 3D nanoprinting technique is precise enough to print metamaterials as well as a variety of optical devices and components such as microlenses, micro-optical devices and metamaterials.

“Our system uses a two-step absorption process to realize 3D printing with accuracy reaching the nanometer level, which is suitable for commercial manufacturing,” said research team leader Cuifang Kuang from the Zhejiang Lab and Zhejiang University, both in China. “It can be used for a variety of applications such as printing micro or nanostructures for studying biological cells or fabricating the specialized optical waveguides used for virtual and augmented reality devices.”

Conventional high-resolution 3D nanoprinting approaches use pulsed femtosecond lasers that cost tens of thousands of dollars. In Optics Letters, Kuang and colleagues describe their new system based on an integrated fiber-coupled continuous-wave laser diode that is not only inexpensive but also easy to operate.

While the device is still in the patent stage, it has the potential to completely change the VR/AR experience.

Summary: Researchers created a revolutionary tiny and efficient thermoelectric device, which can help amputees feel temperature with their phantom limbs.

Known as the wearable thin-film thermoelectric cooler (TFTEC), this device is lightweight, incredibly fast, and energy-efficient, potentially revolutionizing applications such as prosthetics, augmented reality haptics, and thermally-modulated therapeutics. Additionally, this technology has potential in industries like electronics cooling and energy harvesting in satellites.

The study conducted to test the TFTEC demonstrated its ability to elicit cooling sensations in phantom limbs, doing so significantly faster, with more intensity, and less energy than traditional thermoelectric technology.