激光光镊技术是一项在许多科学领域有广阔应用前景的技术。本文详细给出构建一台红外半导体激光光镊的设计思想及实例。由于采用了独特的对大功率多模红外激光选模整形和双透镜陷阱操纵技术等性能价格最优化选择 ,该系统易于构建 ,陷阱操作方便 ,其构建价格仅一般光镊的几十分之一 ,非常适合光镊技术的推广和一般实验室构建 Laser optical tweezers technology is a promising technology in many fields of science. This article gives detailed design ideas and examples of building an infrared semiconductor laser tweezers. Due to its unique performance-price optimization options such as high-power multi-mode infrared laser mode selection and dual-lens trap manipulation, the system is easy to build and easy to operate with traps, and its construction cost is only a few tenths of that of optical tweezers , Is very suitable for the promotion of optical tweezers technology and general laboratory construction