Real-time ToF depth sensor for 3D long-distance measurements

The Hyperlux ID family of real-time, indirect time-of-flight (iToF) depth sensors recently introduced by onsemi offers high-precision long-distance measurements and 3D imaging of fast-moving objects. These sensors utilize a new proprietary global shutter pixel architecture and onboard storage to capture an entire scene while processing depth measurements in real time. With a depth sensing capability of up to 30 meters, four times further than standard iToF sensors, the Hyperlux ID sensors come in a compact form factor. Moreover, they can generate both monochrome images and depth information simultaneously, providing a comprehensive view of the environment without the need for separate sensors.

Enabling a simplified design and offering the farthest depth sensing in the industry, the Hyperlux ID sensors operate effectively under dynamic scene conditions and can capture fast-moving objects, a feat previously unattainable. As automation and robotics continue to expand in industrial markets, the demand for highly accurate depth information to enhance productivity and safety in complex environments is escalating.

Delivering precision measurements of moving objects and high-resolution images, the Hyperlux ID sensors contribute to reducing errors and downtime while optimizing processes in manufacturing systems to lower operational costs. Additionally, they enhance applications such as facial recognition, gesture detection, and 3D video conferencing in commercial settings.

How the depth sensor works

The depth sensors leverage global shutter architecture and indirect Time-of-Flight (iToF) technology to provide rapid and precise depth sensing. By employing iToF technology, they determine depth by measuring the phase shift of reflected light emitted from one or more VCSELs (Vertical-Cavity Surface-Emitting Lasers). The proprietary pixel architecture allows the sensors to capture and store four different phases of light simultaneously in one exposure, capturing the entire scene instantly and enhancing depth measurement accuracy. Additionally, the global shutter technology aligns all sensor pixels with the VCSEL to significantly reduce ambient infrared noise from other light sources. The integration of on-board depth processing enables real-time results without the need for expensive external memory or a high-performance processor.

Applications

In automation and robotics, Hyperlux ID depth sensors are valuable for object detection to enhance navigation and collision avoidance, thereby improving safety on factory floors. For manufacturing and quality control purposes, the sensors measure object volume and shape, detect defects, and ensure products meet quality standards. They are also beneficial in logistics and material handling, measuring pallet and cargo positions, sizes, and content ratios to optimize storage and transportation processes.

In agriculture, these sensors aid in monitoring crop growth and health by measuring plant height, detecting diseases, and optimizing irrigation and fertilization processes. When integrated into access control systems, they offer detailed and accurate facial recognition for payment terminals, residential and commercial entry systems, and more.

The Hyperlux ID family comprises 1.2MP global shutter 3.5µm BSI pixel sensors. The AF0130 model features onboard processing for simplified integration and reduced system costs. For customers desiring to integrate their own depth algorithms, the AF0131 model allows this capability for added flexibility.