【摘要】 为了突破常规激光投影仪由于单一波长的局限性造成应用场景的限制，同时实现对不同零件、不同材料、不同装配工艺的分图层投影，设计并搭建了多色分图层激光扫描自聚焦投影系统。系统采用2种波长的激光作为光源，根据二向色镜的位置不同，提出了多色共光轴和分光路2种激光扫描自聚焦投影方案，并推导了相应的光学系统数学模型。通过系统的自聚焦功能调节镜组间距，均可以实现在不同距离的投影面上聚焦出不同颜色的最小光斑。利用ZEMAX光学设计软件对2种投影光学系统进行仿真，并从系统可靠性和投影效果上对2种系统进行比较分析。实验结果表明：在3 m处的投影面上，共光轴系统各种波长的光斑直径均在0.8 mm以内，且光斑大小均匀，可以实现多色分图层的扫描自聚焦投影功能。更多还原

【Abstract】 In order to break through the restriction of application scene caused by the limitation of single wavelength of conventional laser projector and realize the layer projection of different parts, different materials and different assembly processes, a multi-color layer laser scanning and auto-focus projection system was designed and established. Two wavelengths of laser were adopted as the light source, and according to the different positions of dichromatic mirror, the two laser scanning and auto-focus projection schemes of multicolor co-optical axis and separate optical paths were proposed, and the corresponding mathematical models of optical system were deduced. By adjusting the distance between mirror groups through the auto-focus function of the system, the minimum light spots of different colors could be focused on the projectors at different distances. Two kinds of projection optical systems were simulated by ZEMAX optical design software, and the reliability and projection effect of the two systems were compared and analyzed. The experimental results show that on the projection plane at 3 m, the spot diameter of various wavelengths of the co-optical axis system is within 0.8 mm and the spot size is uniform, which can achieve the scanning and auto-focus projection function of multi-color layers.更多还原