The Myo armband senses muscle and arm movements to control apps using gestures. We took it apart to check out the hardware and unique construction.

Hitachi’s Metaverse Platform for Nuclear Power Plants enhances collaboration among stakeholders, streamlines design and construction workflows, and supports the development of practical and effective investment plans by integrating metaverse and AI technologies.

Emerging spatial computing systems seamlessly superimpose digital information on the physical environment observed by a user, enabling transformative experiences across various domains, such as entertainment, education, communication and training1–3. However, the widespread adoption of augmented-reality (AR) displays has been limited due to the bulky projection optics of their light engines and their inability to accurately portray three-dimensional (3D) depth cues for virtual content, among other factors4,5. Here we introduce a holographic AR system that overcomes these challenges using a unique combination of inverse-designed full-colour metasurface gratings, a compact dispersion-compensating waveguide geometry and artificial-intelligence-driven holography algorithms. These elements are co-designed to eliminate the need for bulky collimation optics between the spatial light modulator and the waveguide and to present vibrant, full-colour, 3D AR content in a compact device form factor. To deliver unprecedented visual quality with our prototype, we develop an innovative image formation model that combines a physically accurate waveguide model with learned components that are automatically calibrated using camera feedback. Our unique co-design of a nanophotonic metasurface waveguide and artificial-intelligence-driven holographic algorithms represents a significant advancement in creating visually compelling 3D AR experiences in a compact wearable device. We develop a method for providing high-quality, holographic, three-dimensional augmented-reality images in a small form factor suitable for incorporation in eyeglass-scale wearables, using high-refraction-index glass waveguides with nanoscale metasurfaces, and incorporating artificial intelligence.

xMEMS Labs has expanded its µCooling fan-on-a-chip platform into XR smart glasses.

US 20250199317 A1 - Head-Mounted Display With Volume Substrate-Guided Holographic Continuous Lens Optics

Published 19.06.2025: 

recording set-up here

This application relates to a see-through head-mounted display using recorded substrate-guided holographic continuous lens (SGHCL) and a microdisplay with laser illumination. The high diffraction efficiency of the volume SGHCL creates very high luminance of the virtual image.

https://www.projectaria.com

"Project Aria is a research program from Meta, to help build the future responsibly. Project Aria unlocks new possibilities of how we connect with and experience the world.

US20220215375 - Smart-glasses based contactless automated teller machine (“ATM”) transaction processing

A method for touchless communication between an ATM and a smartglasses device worn by a user is provided. The method may be executed at the smartglasses device. The method may include identifying a current global positioning system (“GPS”) location of the ATM. The method may include communicating with an external database to determine an ATM identifier associated with the ATM. The ATM identifier may include ATM communication data. The method may include transmitting an external smartglasses identifier to the ATM via the ATM communication data. The method may include receiving a communication from the ATM. The communication may include an interactive payment interface. The method may include displaying the interactive payment interface on the smartglasses. The method may include receiving one or more commands from the user. The method may include transmitting the one or more commands from the smartglasses to the ATM.

news press here:

https://semiconductors.einnews.com/pr_news/818883084/voy-expands-tunable-lens-technology-to-android-xr-and-ai-glasses-while-launching-an-upgraded-cadore-eyewear-line

Our award-winning lens inserts for XR provide sharp vision for both nearsighted and farsighted individuals with a simple slide, unlocking extended reality for individuals, families, and enterprises, eliminating the need to purchase multiple specialized—and wasteful—lenses. Embrace convenience and cost savings with an adjustable solution that can be shared by multiple users. This pioneering product is helping people experience the future together through adaptive VR/XR optimization. Currently compatible with Meta Quest 2, 3, and Lenovo VRX, additional models for Apple Vision Pro and HTC VIVE are in development.

Revolutionary new material for nano-imprint lithography promises to redefine augmented reality with enhanced performance and lower costs.

Solnil has developed original inks enabling the preparation of dense high index (2 < n@520nm < 2.6) TiO2 material with very high transparency (loss < 0.1%).

Selected as a recipient of the Horizon Europe EIC Transition Grant for the revolutionary METAPRINT project. METAPRINT was one of 40 projects chosen from over 400 submissions across 21 country participants. This initiative, titled "Nano-Imprint Lithography of Titania-Based Metaoptics," aims to redefine augmented reality (AR) by delivering next-generation smart-glass displays through unprecedented advances in nano-imprinting of nano-ceramics.

WO2025005768 - WEARABLE DISPLAY APPARATUS AND CONTROL METHOD THEREOF

"Abstract

NUGGETS OF Augmented Reality #5 - DIFFRACTION GRATINGS Theorytowards couple modes H. Kogelnik and C. V. Shank 1971 - Download as a PDF or view online for free

US20160034679 -

Wearable device and method of operating the same - SAMSUNG ELECTRONICS CO., LTD.

Samsung has filed a patent for a wearable sensor that can read the user's veins to establish his or her identity. If implemented, this allows Samsung's future wearables to double as keys for doors and cars.
"The sensor takes a picture of the user’s vein structure and characteristics, then compares it to a vein image in its memory that it knows belongs to the user. The sensor might also detect the user’s pulse rate, which is also unique from person to person."Check also, from 2016
https://www.fastcompany.com/3056357/this-samsung-patent-lets-smartwatches-recognize-you-by-your-veins 

EssilorLuxottica has is the undisputed leader on everything to do with vision. How does a company commanding an entire industry continue to grow?

US20250181182

- Electronic Device Display With Array of Discrete Light-Emitting Diodes

An electronic device may include a display. The display may be formed by an array of light-emitting diodes mounted to the surface of a substrate. The substrate may be a silicon substrate. Circuitry may be located in spaces between the light-emitting diodes. Circuitry may also be located on the rear surface of the silicon substrate and may be coupled to the array of light-emitting diodes using through-silicon vias. The circuitry may include integrated circuits and other components that are attached to the substrate and may include transistors and other circuitry formed within the silicon substrate. Touch sensor electrodes, light sensors, and other components may be located in the spaces between the light-emitting diodes. The substrate may be formed from a transparent material that allows image light to reach a lens and image sensor mounted below the substrate.

US20250172815 - WAVEGUIDE COMBINER ASSEMBLIES FOR AUGMENTED REALITY OR VIRTUAL REALITY DISPLAYS 

SNAP inc. Pubblication of Application  29.05.2025

According to a first aspect of the invention, there is provided a waveguide combiner assembly for an augmented reality or virtual reality display, comprising:

a waveguide combiner, having front and rear surfaces which are each substantially parallel to a waveguide plane, the direction normal to the waveguide plane being the waveguide axis, and the distance between the front and rear surfaces along the waveguide axis being the thickness of the waveguide combiner;

a chassis including a support arm for supporting the waveguide combiner, the support arm defining a cavity between front and rear walls of the support arm which are spaced along a first direction by a distance greater than the thickness of the waveguide combiner, the waveguide axis and the first direction defining an offset angle between them which may be zero or non-zero, an edge portion of the waveguide combiner extending into the cavity; and

at least one actively adjustable mounting structure configured to hold a respective point of the edge portion of the waveguide combiner at a selected position relative to the support arm, thereby enabling adjustment of the offset angle.

In this way, the waveguide combiner integrated within the claimed waveguide combiner assembly can be spatially adjusted relative to the support arm of the chassis, thanks to the at least one actively adjustable mounting structure and without the external assistance of an external intricate optical jig and the use of glue to lock the waveguide combiner in position, which significantly eases the process of positioning the waveguide combiner and reduces the associated cost.

Optical arrangement for a display -

US12222503B2 granted 02/2025

A folded optical arrangement to transmit an image from an image plane to a user's eye through a folded optical transmission path including a collimating element having a first optical element with optically powered surfaces and a second optical element with at least one optically powered surface to receive light from an image source and to collimate and output the light. The first optically powered surfaces and the second optically powered surface to define multiple interfaces along the folded optical path. A refractive index change at each interface controls a direction of light passing through each interface. One surface of the first optical element and the second optical element are adjacent to one another. The adjacent surfaces have dissimilar shapes and each defines an angle with a respective other surface of the relevant optical element at opposing ends of the adjacent surfaces. The opposing angles are not equal.

US20250028166 -

APPARATUS FOR OPTICAL SEE-THROUGH HEAD MOUNTED DISPLAY WITH MUTUAL OCCLUSION AND OPAQUENESS CONTROL

The invention consist of an optical see-through head mounted display (OST-HMD) device with opaqueness control and mutual occlusion capability

The present invention comprises a compact optical see-through head-mounted display capable of combining, a see-through image path with a virtual image path such that the opaqueness of the see-through image path can be modulated and the virtual image occludes parts of the see-through image and vice versa.

WO2025023933 -

HYBRID REFLECTIVE AND DIFFRACTIVE WAVEGUIDE ARCHITECTURE
A hybrid waveguide system employs reflective grating structures to couple display light into and out of the hybrid waveguide system, and a diffractive grating structure to expand the display light in an orthogonal direction. In some embodiments, the hybrid waveguide system includes a reflective waveguide with segmented mirrors that is bonded to a diffractive waveguide including a one-dimensional (1D) diffractive grating.

To further minimize any image gaps at high frequencies, some embodiments of the hybrid waveguide system include a partially reflective thin film coating between the a high-refractive index substrate of a diffractive waveguide including the diffractive grating and a lower refractive index substrate of a reflective waveguide including the reflective grating structures.
Embodiments described herein leverage the advantages of reflective waveguides while avoiding the challenges of image gap artifacts and visibility of mirror structures. In an embodiment, a waveguide system includes a reflective incoupler to couple display light into the waveguide system, a diffractive exit pupil expander to expand an exit pupil of the display light, and a reflective outcoupler to couple the expanded exit pupil out of the waveguide system. In some embodiments, the waveguide system includes a reflective waveguide comprising the reflective incoupler and the reflective outcoupler and a diffractive waveguide comprising the diffractive exit pupil expander.

US20250005620 - INDIVIDUAL-BASED MARKETING APPROACH IN THE METAVERSE

ABSTRACT and CLAIMS

"A method includes enabling a plurality of users to interact with a virtual world, each of the users represented as one or more avatars in the virtual world, obtaining preferences and consent of each of the users, displaying promotional messages to a user of the plurality of users in the virtual world based on the user's preferences and consent, and after displaying the promotional messages to the user, filtering the user's preferences and consent from the virtual world to remove transaction footprints."

1. A method comprising:

enabling a plurality of users to interact with a virtual world, each of the users represented as one or more avatars in the virtual world, using respective virtual reality headsets;

obtaining preferences and consent of each of the users, including combining preferences and consent for multiple avatars of a user concurrently participating in the virtual world;

displaying messages to the user in the virtual world based on the user's combined preferences and consent; and

after displaying the messages to the user, filtering the user's preferences and consent from the virtual world to remove transaction footprints.

2. The method of claim 1, wherein each of the users is represented as a virtual token in the virtual world.

3. The method of claim 1, wherein each of the preferences and consent of each of the users is represented as a virtual token in the virtual world.

4. The method of claim 1, wherein the user triggers an activity to initiate the displaying of the messages.

5. The method of claim 1, wherein an advertiser initiates the displaying of the messages based on the user's preferences and consent.

6. (canceled)

7. The method of claim 1, wherein the user's preferences include allowing the user to control placement of the messages within the virtual world.

8. The method of claim 1, wherein the user's preferences include allowing the user to control timing of the messages within the virtual world.

9. The method of claim 1, wherein the user's preferences include allowing the user to control a length of the promotional messages within the virtual world.

10. The method of claim 1, wherein the user's preferences and consent, and the messages are implemented in a blockchain configuration to generate an individual avatar marketing network.

11. A computer program product for implementing individual-based marketing approaches in a virtual world, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to:

enable a plurality of users to interact with a virtual world, each of the users represented as one or more avatars in the virtual world, using respective virtual reality headsets;

obtain preferences and consent of each of the users, including combining preferences and consent for multiple avatars of a user concurrently participating in the virtual world;

display messages to the user in the virtual world based on the user's combined preferences and consent; and

after the messages are displayed to the user, filter the user's preferences and consent from the virtual world to remove transaction footprints.

12. The computer program product of claim 11, wherein each of the users is represented as a virtual token in the virtual world.

13. The computer program product of claim 11, wherein each of the preferences and consent of each of the users is represented as a virtual token in the virtual world.

14. The computer program product of claim 11, wherein the user triggers an activity to initiate the displaying of the messages.

15. The computer program product of claim 11, wherein an advertiser initiates the displaying of the messages based on the user's preferences and consent.

16. (canceled)

17. The computer program product of claim 11, wherein the user's preferences include allowing the user to control placement of the messages within the virtual world.

18. The computer program product of claim 11, wherein the user's preferences include allowing the user to control timing of the messages within the virtual world.

19. A system for implementing individual-based marketing approaches in a virtual world, the system comprising:

a memory; and

one or more processors in communication with the memory configured to:

enable a plurality of users to interact with a virtual world, each of the users represented as one or more avatars in the virtual world, using respective virtual reality headsets;

obtain preferences and consent of each of the users, including combining preferences and consent for multiple avatars of a user concurrently participating in the virtual world;

display messages to the user in the virtual world based on the user's combined preferences and consent; and

after the messages are displayed to the user, filter the user's preferences and consent from the virtual world to remove transaction footprints.

US20250008656 - WIRE BONDING FOR MINIATURIZING PRINTED CIRCUIT INTERCONNECTION

SUMMARY and CLAIMS

Described herein are techniques for enabling wire bonding between different printed circuit modules. More specifically, printed circuit modules, including inflexible modules (e.g., having a printed circuit board (PCB) substrate) and/or flexible modules (e.g., having a flexible printed circuit (FPC) substrate) may be electrically connected using wire bonding. To do so, embodiments may utilize certain alignment techniques, reinforcement plates, and/or protective structures for the wire bonds, as described in the embodiments provided herein. Because wire bonding can have a pitch of less than 150 μm, the techniques herein can enable electronics to be miniaturized, which may enable devices (e.g., wearable devices) to have smaller form factors.

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