针对空间三维坐标的测量需求, 设计了3D激光雷达光学系统。系统采用发射/接收共光路的结构形式, 以高斯光学为理论基础, 采用Zemax光学设计软件进行仿真。该结构形式不仅提高了系统同轴度、减小外部干扰, 而且简化了系统结构、缩小仪器体积。系统采用扩束准直结构, 实现8倍扩束比。通过微小的调焦, 调整发射光学系统的第一片和第二片透镜之间距离在28.203～14.671 mm之间变化时, 实现了2～18 m的测量范围内, 测距精度0.02 mm+10 μm/m。

For the measurement needs of space three-dimensional coordinates, a 3D laser radar optical system was designed. This system used the structure of transmitting/receiving common path and based on Gaussian optics theory. It can not only improve system concentricity, reduced external interference, and also simplify the system structure, reduce the volume of the instrument. The system uses expanded beam collimation structure to achieve eight times beam expander. Through small defocus, by changing the distance between 28.203-14.671 mm of the transmission optical system between a first lens and the second, it can achieve ranging accuracy 0.02 mm+10 μm/m when the measuring range of 2-18 m.