大量程激光位移传感器的成像系统设计

为了解决目前国内自主研发的激光位移传感器基准工作距离短和测量范围小的问题，设计了一种适用于远距离测量的大量程激光位移传感器成像光学系统。基于激光三角测量原理，结合具体使用要求计算了大量程激光位移传感器的性能指标和成像光学系统的设计参数。选择5片式透镜结构作为系统的初始结构，利用光学设计软件对大量程激光位移传感器成像光学系统进行了仿真，完成了系统优化和性能分析，实现了基准工作距离为1 000 mm、量程为±500 mm、分辨率为0.4 mm的大量程激光位移传感器成像系统设计。结果表明，在测量范围±500 mm内，系统均可以满足成像质量要求。该激光位移传感器成像系统具有工作距离远、测量量程大、结构简单的特点，可满足1 000 mm远距离处大量程范围的测量使用要求。

Design of imaging system for wide-range laser displacement sensor

In order to solve the problems of short reference working distance and small measuring range of laser displacement sensors developed independently in China at present, an imaging optical system for a wide-range laser displacement sensor was designed, which was suitable for the long distance measurement. Based on the laser triangulation principle, combined with specific application requirements, the performance indicators of a wide-range laser displacement sensor and parameters of an imaging optical system were calculated. The five-piece lens structure was selected as the initial structure of the system, and the imaging optical system of wide-range laser displacement sensor was designed with optical design software. The optimal design and performance analysis of the system were completed, and the system with reference working distance of 1 000 mm, measuring range of ±500 mm and resolution of 0.4 mm was developed. The simulation results show that the system can achieve good imaging quality within the measuring range of ±500 mm. The proposed laser displacement sensor imaging system has the advantages of long working distance, wide measuring range and simple structure, which can meet the requirements of wide-range measurement at 1 000 mm.