用于激光周向探测的发射光学系统  

Emission Optical System for Laser Circumferential Detection

作　　者：王泽宇 谢洪波[1] 段文浩 杨童[1] 陈洁 杨磊[1] Wang Zeyu;Xie Hongbo;Duan Wenhao;Yang Tong;Chen Jie;Yang Lei(Key Laboratory of Optoelectronics Information Technology,Ministry of Education,School of Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;National Key Laboratory of Electromagnetic Space Security,Tianjin 300308,China)

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室,天津300072 [2]电磁空间安全全国重点实验室,天津300308

出　　处：《光学学报》2023年第23期130-137,共8页Acta Optica Sinica

基　　金：电磁空间安全全国重点实验室基金。

摘　　要：为了提高激光周向探测中出射光场的均匀度,增加其有效作用区域,本文提出了一种采用圆锥型视场的前倾探测方案。基于六象限分区的布局方式,该系统利用非球面透镜对激光二极管的输出光束在子午和弧矢两个方向同时进行准直,通过鲍威尔棱镜实现弧矢方向扩束匀光,采用偏转棱镜保证光束前倾角为60°,并借助弧矢方向上的柱面镜进行完整的圆锥型视场拼接。在不同距离处的模拟仿真结果表明,系统在子午方向上出射视场角为±0.75°,在弧矢方向上可以覆盖360°视场完成周向探测。系统出射光场在四个目标平面上的照度均匀度均大于90%,能量利用率可达98%以上。该系统结构紧凑,整体仅由三片透镜构成,实现了一体化设计,为激光周向探测系统中的光学设计提供了参考。Objective Laser circumferential detection systems actively detect all-round targets by emitting laser beams and feature good initiative,good directionality,and less susceptibility to electronic interference.The emission optical system is an important part that determines the detection range of the system and affects the detection accuracy.In the emission optical system,cylindrical lenses and aspherical lenses are usually adopted to change the divergence of semiconductor laser light sources,and the complex surface spliced by prisms and cylindrical mirrors and aspherical cylindrical lens arrays make the energy uniform within the active area.However,the outgoing light field of the above method is still a linear beam,and the areas where the emission fields meet are prone to non-crossing or excessive crossing,which will damage the energy uniformity within the entire field of view(FOV)and affect the anti-interference ability and detection accuracy of laser circumferential detection.To improve the uniformity of the outgoing light field and enhance its effective area,we propose a forward-tilt detection scheme using a conical FOV.Methods The partition scheme of the laser circumferential detection system generally places the transmitting and receiving system evenly in the radial missile direction,usually divided into four to eight quadrants.We use a six-partition layout and set the beam's forward tilt angle to 60°,detecting the target in advance and obtaining relevant information.A single partition is mainly divided into three parts:fast-axis and slow-axis collimation,slow-axis beam expansion and homogenization,and forward-tilt detection.Firstly,the output beam of the semiconductor laser is collimated in both meridional and sagittal directions by employing an aspheric lens.Then,a Powell prism is utilized to realize beam expansion and homogenization in the sagittal direction.Finally,a deflection prism is leveraged to ensure that the forward tilt angle of the beam is 60°,and a complete conical FOV is assembled by a cylindr

关 键 词：周向探测 六象限分区 激光 前倾探测 圆锥型视场 

分 类 号：TJ430[兵器科学与技术—火炮、自动武器与弹药工程]