Analysis of Scanning Characteristics of a Two-dimensional Scanning Lidar
二维扫描型激光雷达的扫描特性分析

On the basis of the vector theory of optical reflection and the mirror rotation theorem, the two-dimensional scanning imaging characteristics of a LIDAR are analyzed in terms of the deviation between a rotation axis and the surface of a scanning mirror. The formula of the single point two-dimensional scanning is given and the emulation image is obtained. At the same time, through the theoretical calculation of the reflection of a line-shape laser beam, the coupling matrix of a two-dimensional scanning mirror is given and the length and deflection of the line-shape laser beam projected on the object after being reflected on two scanning mirrors are obtained. This provides a basis for the subsequent data processing. Finally, the shapes of the two-dimensional scanning mirrors are designed. This design utilizes the surface of a scanning mirror maximally while the requirement of the receiving field of view is satisfied. Thus, the rotation inertia of the scanning mirrors and the power of the load motor are reduced.