Real-time ToF depth sensor for 3D long-distance measurements
The Hyperlux ID family of real-time, indirect time-of-flight (iToF) depth sensors just released by onsemi deliver high-precision long-distance measurements and 3D imaging of fast-moving objects.
By employing a new proprietary global shutter pixel architecture and onboard storage, the depth sensors can capture an entire scene while simultaneously processing depth measurements in real time. Hyperlux ID sensors enable depth sensing up to 30 metres, which is four times further than standard iToF sensors, all within a smaller form factor. Additionally, the sensor family is capable of producing both monochrome (black and white) images and depth information concurrently. By combining these two outputs, the sensor can provide a comprehensive view of the environment without the need for separate sensors for visual and depth data.
Hyperlux ID sensors enable a simplified design, the farthest depth sensing in the industry, operation under dynamic scene conditions, and the ability to capture fast-moving objects, which was previously impossible. As automation and robotics become pervasive in industrial markets, the ability to obtain highly accurate depth information quickly and efficiently is becoming critical to improve productivity and safety in these complex environments.
Providing precision measurements of moving objects and high-resolution images, the Hyperlux ID sensors can help reduce errors and downtime and optimize processes in manufacturing systems to lower operational costs. Additionally, they can enhance facial recognition, gesture detection and 3D video conferencing in commercial applications.
How the depth sensor works
The depth sensors utilise global shutter architecture and indirect Time-of-Flight (iToF) technology to provide precise and rapid depth sensing. Employing iToF technology, they detect depth by measuring the phase shift of the reflected light emitted from one or more VCSELs (Vertical-Cavity Surface-Emitting Lasers). The proprietary pixel architecture enables the sensors to capture and store four different phases of light simultaneously in one exposure, instantaneously capturing the entire scene and enhancing depth measurement accuracy. Furthermore, the global shutter technology aligns all sensor pixels with the VCSEL to significantly minimise ambient infrared noise from other lighting sources. The integration of on-board depth processing also facilitates 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 ideal for object detection for better navigation and collision avoidance to improve safety on factory floors. For manufacturing and quality control, the sensors measure the volume and shape of objects, detect defects, and ensure that products meet quality standards. The sensors are also ideal for logistics and material handling, measuring the positions, sizes, and content ratios of pallets and cargo to optimize storage and transportation processes.
In agriculture, these sensors can also help monitor crop growth and health by measuring plant height, detecting diseases, and optimizing irrigation and fertilisation processes. Utilised in access control systems, they can also provide highly detailed and accurate facial recognition for payment terminals, residential and commercial entry systems, and more.
The Hyperlux ID family includes 1.2MP global shutter 3.5µm BSI pixel sensors. The AF0130 model also features onboard processing to simplify integration and reduce system costs. For customers who prefer to integrate their own depth algorithms, the AF0131 allows this capability for added flexibility.
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