针对激光探测小型化收发系统的设计难点, 提出了一种大视场小型化设计方案。将激光器与驱动电路集成在氮化铝基板上, 达到提高性能和压缩尺寸的目的。经过理论计算和ZEMAX光学仿真, 采用光纤、自由曲面阵列柱透镜及球面柱透镜实现光的整形和会聚, 减小轴向尺寸。设计了带放大电路的小体积接收模块。对小型化系统中脉冲电流带来的电磁干扰问题进行分析, 采用多种措施屏蔽电磁干扰。最后加工制作了原理样机并进行了测试实验, 结果表明: 该系统有效抑制了电磁干扰, 并能有效探测距离为5 m的目标, 验证了小型化技术的可行性。

Aiming at the design difficulty of miniaturized laser transmitting-receiving detection system, a solution for large field of view, miniaturization was proposed. Laser chip and driving circuit were integrated on aluminum nitride substrate, which achieved the purpose of improving performance and dimension compression. According to theoretical calculation and ZEMAX optical simulation, the optical fiber, free surface array cylindrical lens and spherical cylindrical lens were used to realize shaping and convergence of light, which reduced the axial dimension. A small size receiving module with amplified circuit was designed. The electromagnetic interference caused by the pulse current was analyzed in the miniaturized system, further more, a variety of electromagnetic compatibility measures were adopted to shield electromagnetic interference. At last, the initial prototype was made and the experiment of measurement was done. Results show that the system can effectively suppress the electromagnetic interference, and detect the target at the distance of 5 m. Therefore, it verifies the feasibility of the miniaturization technology.