半主动激光导引头光学系统设计及线性度分析

Design of optical system for semi-active laser seeker and related linearity analysis

摘要: 文章阐述半主动激光导引头的工作原理，分析四象限探测器输出信号与目标位置之间的关系，并对四象限探测器光斑能量分布关系与线性度进行推导；设计单片透镜、双片透镜组、三片透镜组3款不同的光学系统，以光斑能量照度信息为基础，分析特定视场角范围内光学系统的线性度，最后得到在±15°视场角中线性视场可达±8°的光学系统。

Abstract: Based on the working principle of the semi-active laser seeker, this paper analyses the relationship between the output signal of the four-quadrant detector and the position of the target. The distribution of the spot energy detected by the four-quadrant detector is obtained, and its linearity is analyzed.Three different optical systems featured by a single-lens, a double-lens group, and a triple-lens group are designed, respectively. Taking the spot illumination information as a reference, the linearity of the optical system in a certain scope of view angle is analyzed. Finally, an optical system with a linear field view up to ±8° at a view angle of ±15° is developed.