Light Detection and Ranging (LiDAR) is a technology that measures the distance to an object by scanning a laser over the object and detecting the reflected light with an optical sensor. It has been applied in a wide range of fields such as geological surveys and surveying, replacing radar.

In recent years, it has also been applied to automated automobile driving technology. There are two types of 3D LiDAR for automotive use: solid-state and MEMS.

The solid-state method replaces the motor-based mechanism with semiconductors and optical technology. In conventional 3D-LiDAR, the laser and detector are mechanically rotated. However, the solid-state method does not use a rotation mechanism. Although the detection area is smaller due to the limited laser beam angle, it is smaller, can be installed in a limited space, and is less fragile. However, it is small, can be installed in a limited space, and is not easily broken. By using multiple sensors, it can cover 360°C in the horizontal direction, and has become the mainstream for automotive applications.

In the MEMS method, a MEMS mirror is used to scan the laser beam. The MEMS mirror is rotated using a coil and magnet, and the laser beam is scanned by reflection from the mirror.

Matsusada provides avalanche photodiodes (APD) used as a photodetector for LiDAR, and also high voltage power supplies for APD are available. Furthermore, Matsusada offers high voltage power supplies used in laser diode experiments, etc. As for mirror positioning for laser scanning, Matsusada Precision's piezo actuators are available.

TOF System
Light Detection and Ranging (LiDAR)
Related words:
  • Automated driving
  • Radar
  • Optical sensor
  • MEMS