半主动寻的激光制导系统的干涉编码方法
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摘要
提出一种半主动寻的激光制导干涉编码方法,在传统时序编码基础上加入多子光束相干发射系统产生的空间干涉图样,形成时空域相融合的编码信号。设计一种多子光束相干发射系统,依据子光束良好的空间相干性进行空间构图,形成编码可控的空间干涉图样。计算结果表明:当参数K值(子光束对角线之比)在2.5～3.5之间时,干涉图样明暗相间程度最为明显,干涉图样最为纯净;当子光束相干发射系统中分束镜的位置偏移小于0.1λ(λ为激光波长),角度偏离小于0.1 θ_0(θ_0为光束发散角)时,发射系统机械振动对制导系统的影响可忽略不计。
The interference encoding method of semi-active homing laser-guided system based on multiple sub-beams interference was proposed. The spatial interference pattern was combined with the temporal coded signal to produce a new temporal-spatial coded signal. A coherent emission system of multiple sub-beams was designed, the laser was divided into several equal power sub-beams which could produce an effective spatial interference pattern due to their coherence. Calculation results show that the interference pattern presents special distribution features of alternating brightness and darkness.When the value of(the ratio of diagonal) is between 2.5 to 3.5, the interference pattern is most obvious and pure. When the position offset and angle deviation of the beam splitter are less than 0.1λ(λ is the wavelength) and 0.1 θ_0(θ_0 is the beam divergence angle) in the sub-beams coherent emission system, respectively, the effect of mechanical vibration on the interference emission system could be ignored.
The interference encoding method of semi-active homing laser-guided system based on multiple sub-beams interference was proposed. The spatial interference pattern was combined with the temporal coded signal to produce a new temporal-spatial coded signal. A coherent emission system of multiple sub-beams was designed, the laser was divided into several equal power sub-beams which could produce an effective spatial interference pattern due to their coherence. Calculation results show that the interference pattern presents special distribution features of alternating brightness and darkness.When the value of(the ratio of diagonal) is between 2.5 to 3.5, the interference pattern is most obvious and pure. When the position offset and angle deviation of the beam splitter are less than 0.1λ(λ is the wavelength) and 0.1 θ_0(θ_0 is the beam divergence angle) in the sub-beams coherent emission system, respectively, the effect of mechanical vibration on the interference emission system could be ignored.
引文
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[2]Wang Kuangbiao.Status quo,key technology and development of laser guided weapon[J].Infrared and Laser Engineering,2007,36(5):651-655.(in Chinese)
[3]Miao Xikui,Zhao Wei,Zhang Hengwei,et al.Research of laser encoding method based on time-controlled pulse interval[J].Infrared and Laser Engineering,2016,45(10):1006002.(in Chinese)
[4]Li Jianzhong,Peng Qixian,Li Zeren,et al.Technology of missile-borne laser active imaging guidance[J].Infrared and Laser Engineering,2014,43(4):1117-1123.(in Chinese)
[5]Zhang Xin,Du Zhiyuan,Qiao Yanfeng,et al.Study on linear field of strapdown semi-active laser seeker[J].Chinese Journal of Optics,2015,8(3):415-421.(in Chinese)
[6]Luo Haibo,Xu Lingyun,Hui Bin,et al.Status and prospect of target tracking based on deep learning[J].Infrared and Laser Engineering,2017,46(5):0502002.(in Chinese)
[7]Yang Fang,Zhang Xin,He Yan,et al.Fiber laser ranging system based on different pseudorandom code modulation[J].Chinese Journal of Lasers,2014,41(6):270-275.(in Chinese)
[8]Shen Shanshan,Chen Qian,He Weiji,et al.Research on performance of random bitstream ranging system based on single photon detection theory[J].Acta Optica Sinica,2014,34(10):131-138.
[9]Fan Jinping,Xu Xiaofei,Zhang Wangping,et al.Multiwavelength phase-shifting interferometry based on principal component analysis[J].Chinese Journal of Lasers,2015,42(10):221-230.(in Chinese)
[10]Guo Fudong,Tang Feng,Lu Yunjun,et al.Rapid adjustment and measurement for subaperture stitching interferometry[J].Optics and Precision Engineering,2017,25(10):2682-2688.(in Chinese)
[11]Lian Tianhong,Wang Shiyu,Cai Defang,et al.Coherent emitting of multiple sub-beams for small target detection[J].Acta Physica Sinica,2014,63(3):136-144.(in Chinese)
[12]Chen Fei,Chai Jinhua,Liu Xin.Laser jamming scheme and experiment research of quasi parallel light interference[J].Infrared and Laser Engineering,2017,46(7):0706001.(in Chinese)
[13]Han Yongchang,Hu Wenhui,Yu Jie,et al.Interference of dissociating wave packets in the I2 molecule driven by femtosecond laser pulses[J].Chinese Physics B,2009,18(11):4834-4839.(in Chinese)
[14]Wang Leijie,Zhang Ming,Lu Sen,et al.Ultraprecision control of homodyne frequency-shifting interference pattern phase locking system[J].Optics and Precision Engineering,2017,25(5):1213-1221.(in Chinese)
[15]Gao Hongyi,Chen Jianwen,Xie Honglan,et al.A new method for building an atomic matter-wave interferometry[J].Acta Physica Sinica,2002,51(8):1696-1699.(in Chinese)
[16]Qi Ziwen,Liu Bingguo,Zhang Zhonghai,et al.Comparison of phase extraction algorithms in testing of phase defects with two-point interference[J].Chinese Journal of Optics,2016,9(4):483-490.(in Chinese)