设计了一套用于导弹精确制导的激光及可见双模导引头, 采用RC复杂化设计双路共用主、次镜和多次光路折转的形式来减小结构体积。激光光路设计焦距为300 mm、视场为0.6°, 用于激光引导后最终目标的确认; 可见光光路焦距为100 mm、视场为3°, 用于较大区域内初始目标的搜索。设计过程采用计算机软件进行优化分析, 总质量控制在600 g以内, 在满足体积小、质量轻的同时确保了热稳定性和结构可靠性。环境试验结果表明, 可见光路的光学传递函数优于0.3@50 lp/mm, 满足最终使用要求。

Laser/visible dual-mode seeker used for precise guidance of missile was designed. In order to reduce the structure volume, RC complex structure of double-channel was used, which shared main mirror and secondary mirror together, and multiple-folding for light transforming was adopted. The focal length and field angle of the visible light path are 100 mm and 3° separately, which are designed for searching the initial goal of the larger region. The focal length and field angle of the laser light path are 300 mm and 0.6° separately, which are designed for confirmation of the final target guided by laser. The computer software was used to optimize the analysis of design. The total quality is less than 600 g. These characteristics of structure design make certain the thermal stability and structural reliability. The results of environmental tests show that the visible MTF is better than 0.3@50 lp/mm, satisfying the end requirements.