针对激光测距仪使用的650 nm激光二极管光源的远场发散角特点,结合非球面光学设计理论,使用ZEMAX软件模拟计算了非球面透镜准直系统成像像差并进行了最优化,设计出非球面准直整形系统,给出了系统数据、点列图、横向像差特性曲线和光程差仿真图.给出了一种采用非球面透镜准直系统对激光二极管的发散角进行压缩准直的设计.由计算结果可知,准直整形后的最大发散角压缩为0.1999 mrad,相应的光斑更均匀,能量利用率提高.给出的光学系统结构简单、制作方便、具有很好的球差校正能力、成像精度高且使用方便.% According to the characteristics of divergence angles in far field from 650 nm laser diode light source used in laser range finders and integrated with the theory of aspheric optics design, the image aberration of the aspheric collimating lens is simulated and calculated by ZEMAX software and the optimum design is per⁃formed. The aspheric collimating and shaping system is designed. The system data, spot diagrams, characteristic curves of transverse ray aberration and simulation diagrams are given. A design method which uses the aspheric lens collimating system to compress and collimate the divergence angles of laser diodes is given. The calculation result indicates that the maximum divergence angle after collimated and shaped is compressed into 0.199 9 mrad. The relative light patch becomes more uniform and the energy efficiency is improved. The given optical system has the characteristics of simple structure, easy to produce, excellent spherical aberration correction ability, high imaging accuracy and easy to use.
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