Abstract
Light detection and ranging (LiDAR) that detects three-dimensional information of surrounding objects
are attracting much attention in these years with topics on autonomous vehicles, robots and drones.
However, conventional LiDAR devices are large and costly, mainly because of using a mechanical beam
steering device, which hampers their wide range of applications. Therefore, various nonmechanical
LiDAR devices, such as flash-type, phased-array-type and slow-light-type, are being developed extensively.
This paper explains principles of different types of LiDAR devices, their performance and essential
constrains, and requirements for each LiDAR component. The paper also focuses on a challenge toward
the realization of stamp-size nonmechanical LiDAR.
