Mitsubishi Electric Corporation announced that it has developed a compact light-detection and ranging (LiDAR) solution incorporating a micro-electromechanical system (MEMS) that achieves an extra-wide horizontal scanning angle to accurately detect the shapes and distances of objects ahead in autonomous driving systems.
The new LiDAR solution irradiates objects by laser and uses a dual-axis (horizontal and vertical) MEMS mirror to scan for the reflected light, generating three-dimensional images of vehicles and pedestrians. Mitsubishi Electric expects this compact, low-cost solution to contribute to the realisation of safe, secure autonomous driving.
Large dual-axis electromagnetic mirror with unique lightweight design enabling wide scanning angle: After objects are irradiated by laser, the maximum amount of reflected light must be collected in order to obtain the most precise three-dimensional images, particularly of vehicles and pedestrians. LiDAR systems therefore require mirrors with a large surface area in order to maximise light collection. Additionally, a wide scanning angle is required for accurate vehicle periphery monitoring. Mitsubishi Electric’s new development incorporates the industry’s largest electromagnetic MEMS mirror, measuring 7mm by 5mm, in a lightweight design which is able to scan horizontally and vertically. Despite its size, the unique structure of the MEMS mirror facilitates a reduction in weight without sacrificing rigidity. The lightweight design and high electromagnetically generated driving force allows the mirror to achieve large horizontal movement of ±15 degrees. Vertical movement is currently ±3.4 degrees, and Mitsubishi Electric aims to increase this to ±6.0 degrees or more by improving the beam structure of the MEMS.
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