Demonstrating the Working Principle of Flash LiDAR

Nowadays, LiDAR technology has been applied in not only the professional areas but also in the consumer products. As an example, the flash LiDAR is found of great use in the smart devices because of their capability of fast and accurate 3D distance detection and measurement. In this example, we demonstrate the working principle of a typical flash LiDAR, which is composed of an array of sources, collimation lens system, and diffractive grating as beam splitter. Analysis is done in both the spatial and the spatial frequency domains.