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    Origami-inspired ring lets users ‘feel’ virtual worlds

    January 28, 2026, Categories  Physics, Technology/Electronics

    A ring that lets users 'feel' virtual worlds
    A wearable haptic force-feedback ring with a three-axis force-sensing skin. A) We developed a wearable haptic ring, OriRing, which weighs only 18 g and generates forces of up to 6.5 N. The design incorporates a folding-based prismatic joint, a three-axis force-sensing skin, inkjet-printed bending sensors, SPAs and 3D printed ring frames. B) Force-sensing skin consists of an upper layer with soft pyramid microstructures, a lower layer with four resistive pixels and a spacer separating the two layers. This design enables the detection of both normal and shear forces. C) With its multimodal sensing and actuation capabilities, OriRing renders the size and stiffness of virtual objects through kinaesthetic and proprioceptive feedback...
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    Metalenses Harness AI for High-Resolution, Full-Color Imaging for Compact Optical Systems

    November 17, 2024, Categories  Physics

    A metalens, composed of an array of nanostructures with arbitrary rotational angles, acquires an image, which is restored to generate an output image that closely approximates the quality of the original “ground truth” image
    A metalens, composed of an array of nanostructures with arbitrary rotational angles, acquires an image, which is restored to generate an output image that closely approximates the quality of the original “ground truth” image. Credit: Seo et al., doi 10.1117/1.AP.6.6.066002

    Modern imaging systems, such as those used in smartphones, virtual reality (VR), and augmented reality (AR) devices, are constantly evolving to become more compact, efficient, and high-performing. Traditional optical systems rely on bulky glass lenses, which have limitations like chromatic aberrations, low efficiency at multiple wavelengths, and large physical sizes. These drawbacks present challenges when designing smaller, lighter systems that still produce high-quality images.

    To overcome these issues, rese...

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    Eye-Tracking Glasses provide a New Vision for the future of Augmented Reality

    November 3, 2018, Categories  Biology/Biotechnology, Physics, Technology/Electronics

    Integrating eye tracker into a regular pair of glasses, the system relies on NIR lights and photodiodes for eye tracking and is powered by two thin solar cells on the arms of the glasses. Credit: Photo courtesy of DartNets Lab

    Integrating eye tracker into a regular pair of glasses, the system relies on NIR lights and photodiodes for eye tracking and is powered by two thin solar cells on the arms of the glasses.
    Credit: Photo courtesy of DartNets Lab

    Battery-free eye-tracking glasses developed at Dartmouth College could create an even more realistic experience for augmented reality enthusiasts. The new technology improves player controls for gaming and allows for more accurate image displays.

    High power consumption and cost have kept eye trackers out of current augmented reality systems. By using near-infrared lights and photodiodes, Dartmouth’s DartNets Lab has created an energy-efficient, wearable system that tracks rapid eye movements and allows hands-free input of system commands.

    The glasses, which can also h...

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