基于液晶相控阵和体全息光栅的激光多目标指示技术

Laser Multi-Target Indication Technique Based on Liquid Crystal Optical Phased Array and Volume Holographic Grating

为解决现今激光制导武器指示器指示效率低下、单次指示集群目标能力差等问题,从光束偏转控制和光束角度放大技术的原理出发,以液晶相控阵和多路复用体全息光栅为控件,设计了可用于多目标指示的大角度激光光束偏转控制系统;分析了影响液晶相控阵光束偏转特性的参数的选取规则,确定了大角度光束偏转系统的设计方法,模拟了激光多目标指示系统的指示过程,并对系统误差来源和误差修正方法进行了理论分析和仿真。结果表明:该系统可以快速地对光束实现最大偏转角度为15.63°的二维准连续、可编程控制的偏转;误差修正方法可有效提高激光光束的指示精度,使误差角度下降50%左右。所提出的激光多目标指示系统的设想,可实现对二维平面内多目标的准连续、准同时的精确指示,可为激光多目标指示器的设计提供参考。

To address the problems of low efficiency and lack of ability of single indicating cluster target of a laser-guided weapon indicator, a large-angle laser deflection control system used for multi-target indication is designed based on the beam deflection control and beam-angle amplification techniques, and a liquid crystal-phased array and multiplex volume holographic grating are used as controls. The selection rules of the parameters affecting the deflection characteristics of the liquid crystal optical phased array and the design method of the large angle beam deflection system are analyzed in this study. Additionally, the indication process of the laser multi-target indication system is simulated and the error source and correction method are simulated and theoretically analyzed. Results indicate that the proposed system can rapidly achieve quasi-continuum and programmable deflection control of the laser beam in two-dimensional space with a maximum light beam deflection angle of 15.63°. Furthermore, the proposed error correction method can effectively improve the indicated precision of the laser and reduce the error angle by about 50%. Overall, the proposed laser multi-target indication system can be used to realize quasi-continuum and the precise quasi-instantaneous indication of multiple targets in two-dimensional space, thus offering theoretical support for the design of a laser multi-target indicator.