Earlier this year, we announced our latest research glasses, Aria Gen 2, marking the continuation of Project Aria’s mission to enable researchers across the world to advance the state of the art in machine perception, contextual AI, and robotics through access to cutting-edge research hardware and open source datasets, models, and tooling. Today, we’re excited to share more about the technology inside Aria Gen 2. This includes an in-depth overview of the form factor, audio capabilities, battery life, upgraded cameras and sensors, on-device compute, and more.
What Is Aria Gen 2?
Aria Gen 2 is a wearable device that combines the latest advancements in computer vision, machine learning, and sensor technology. Aria Gen 2’s compact form factor and lightweight design make it an ideal choice for researchers who need to collect data or build prototypes in a variety of settings. The glasses contain a number of improvements when compared to Aria Gen 1, its research predecessor, announced back in 2020.
Aria Gen 2: Advancements and Features
The transition from Aria Gen 1 to Gen 2 marks a significant leap in wearable technology, offering enhanced features and capabilities that cater to a broader range of applications and user needs. Below, we explore the key differences and improvements introduced in Aria Gen 2.
1. Wearability
Aria Gen 2 boasts superior wearability, characterized by enhanced comfort and fit, while accommodating a wider range of face morphologies and a rich sensor suite for research. The glasses maintain a lightweight design (weighing in at 74 – 76g, depending on size) and now include folding arms for easier storage and transport for everyday use. To ensure each wearer has an optimal physical and functional fit, we’ve introduced eight size variations of the device—accounting for a number of human factors including head breadth and nose bridge variation.
Eight size variations of our Aria Gen 2 devices.
2. Computer Vision (CV) Camera Enhancements
High Dynamic Range (HDR): Aria Gen 2’s global shutter camera sensor offers a high dynamic range of 120 dB, compared to the 70 dB range in Gen 1. This allows for superior computer vision tasks across diverse lighting conditions.
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The video illustrates that the CV camera is able to capture highly dynamic scenes with an LED light’s filament being resolved along with the rest of the details from the scene.
Wide Field of View (FOV): Aria Gen 2 is equipped with four computer vision (CV) cameras, doubling the number of CV cameras in Gen 1, to provide a wider field of view and enable advanced 3D hand and object tracking.
Stereo Overlap: The stereo overlap in Gen 2 is increased to 80° from Gen 1’s 35°, facilitating stereo-based foundation models that enhance depth perception and spatial awareness.
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The example here illustrates how the increased stereo overlap enables methods such as NVIDIA’s FoundationStereo to generate depth maps based on rectified stereo images. The depth maps can be fused to generate geometric reconstructions of the scene only using Aria Gen 2’s stereo pair data.
3. New Sensor Integrations
Ambient Light Sensor (ALS): Aria Gen 2 includes a calibrated ALS, enabling better exposure control algorithms and unlocking new capabilities at low frame rates. The ALS’s ultraviolet mode can be used to distinguish between indoor and outdoor lighting as illustrated by the video.
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Contact Microphone: Aria Gen 2 includes a contact microphone embedded in the nosepad of the device, enhancing audio capture in noisy environments.
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The video showcases a wearer in a wind tunnel to simulate a windy scenario where the contact microphone is able to pick up the wearer’s whisper when the acoustic microphones cannot.
Heart Rate: Aria Gen 2 includes a photoplethysmography (PPG) sensor embedded in the nosepad of the device, that enables estimation of heart rate of the person wearing the device.
4. Device Time Alignment
Aria Gen 2 has an onboard hardware solution that utilizes Sub-GHz radio technology to broadcast timing information, enabling precise time alignment with other Aria Gen 2 devices or compatible devices that support Sub-GHz radio. This technology achieves time alignment with an accuracy of sub-millisecond, marking a significant improvement over the software-based alignment of Gen 1.
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The video shows how Aria Gen 2 uses device time alignment for tasks like writing from distributed captures from two Aria Gen 2 devices.
5. On-device Realtime Machine Perception (MP) Signals
Aria Gen 2 features advanced on-device machine perception algorithms that run on Meta’s energy-efficient custom coprocessor. These cutting-edge capabilities enable the device to generate precise and accurate data, tracking how we interact with our surroundings.
Visual Inertial Odometry (VIO)
One of the key features of Aria Gen 2 is its ability to track the glasses in six degrees of freedom (6DOF) within a spatial frame of reference using Visual Inertial Odometry (VIO). This allows for seamless navigation and mapping of the environment, opening up new possibilities for research in contextual AI and robotics.
Eye Tracking
Aria Gen 2 also boasts an advanced camera-based eye tracking system that tracks the wearer’s gaze with unparalleled accuracy. This system provides a wealth of information, including: gaze per eye, vergence point, blink detection, pupil center estimation, pupil diameter, corneal center, etc.
These advanced signals enable a deeper understanding of the wearer’s visual attention and intentions, unlocking new possibilities for human-computer interaction.
Hand Tracking
Aria Gen 2 also features a hand tracking solution that tracks the wearer’s hand in 3D space. This produces articulated hand-joint poses in the device frame of reference, facilitating accurate hand annotations for datasets and enabling applications such as dexterous robot hand manipulation that require high precision.
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Demonstration of Aria Gen 2’s sensors and machine perception capabilities, as well as off-device algorithms built on them.
The Future of Aria Is Here: Stay Informed
Aria Gen 2 glasses pave the way for future innovations that will define the next computing platform. Applications to work with Aria Gen 2 will open later this year, and researchers who are interested in staying informed can join the Aria Gen 2 interest list. Meanwhile, applications for Aria Research Kit with Aria Gen 1 glasses are still being accepted on a rolling basis—apply now to get started immediately.
Join us at CVPR 2025 in Nashville, Tennessee, this June, where the team will showcase Aria Gen 2 glasses through interactive demos. Visit the Meta booth to experience the latest advancements and learn more about the innovative features of Aria Gen 2.
