多节点激光通信天线紧凑型摆镜组件设计
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摘要
为了减小多节点激光通信天线的工作包络尺寸并提高二维摆镜的运动控制精度,提出了一种紧凑型摆镜组件。采用高体分铝基碳化硅(SiC/Al)支撑板与H-K9L反射镜直接黏接的方案,提高了摆镜面形的热稳定性,摆镜回转中心至镜面的距离被缩短至20mm。黏接面采用三点薄圆环的设计,在保证摆镜组件动态刚度的前提下有效降低了黏接应力对摆镜面形的影响。有限元分析结果表明,摆镜组件的基频为1319.96Hz,在(20±5)℃工作温度范围内,面形峰谷(PV)值优于λ/4(λ=632.8nm),面形均方根(RMS)值优于λ/22。使用ZYGO激光干涉仪对摆镜的面形进行检测,结果表明,在(20±5)℃温度范围内,摆镜面形的PV值优于λ/4,RMS值优于λ/29,满足激光通信天线RMS为λ/15的指标要求。
In order to reduce the working envelope size of multi-node laser communication antennas and improve the motion control accuracy of two-dimensional tip-tilt mirror,a compact mirror assembly is proposed.A scheme of directly bonding between a high volume fraction Al-based SiC(SiC/Al)supporter and a H-K9 L plane mirror is adopted.The thermal stability of the tip-tilt mirror surface shape is improved,and the distance between the tip-tilt mirror assembly rotation center and the mirror surface is shortened to 20 mm.The design of three-point thin ring is used on the bonding surface.The influence of the bonding stress on the mirror surface is effectively reduced on the basis of ensuring the dynamic stiffness of the tip-tilt mirror assembly.The results of finite element analysis show that the fundamental frequency of the tip-tilt mirror assembly is 1319.96 Hz.The tip-tilt mirror surface shape peak-valley(PV)value is better thanλ/4(λ=632.8 nm)and the root mean square(RMS)value is better thanλ/22 in the working temperature range of(20±5)℃.A ZYGO laser interferometer is used for testing the mirror surface shape,and the test results show that the PV value of the tip-tilt mirror surface shape is better thanλ/4 and the root mean square(RMS)value is better thanλ/29 in the temperature range of(20±5)℃.These results are better than tip-tilt mirror surface shape RMS value ofλ/15 and meet the laser communication antenna requirement.
In order to reduce the working envelope size of multi-node laser communication antennas and improve the motion control accuracy of two-dimensional tip-tilt mirror,a compact mirror assembly is proposed.A scheme of directly bonding between a high volume fraction Al-based SiC(SiC/Al)supporter and a H-K9 L plane mirror is adopted.The thermal stability of the tip-tilt mirror surface shape is improved,and the distance between the tip-tilt mirror assembly rotation center and the mirror surface is shortened to 20 mm.The design of three-point thin ring is used on the bonding surface.The influence of the bonding stress on the mirror surface is effectively reduced on the basis of ensuring the dynamic stiffness of the tip-tilt mirror assembly.The results of finite element analysis show that the fundamental frequency of the tip-tilt mirror assembly is 1319.96 Hz.The tip-tilt mirror surface shape peak-valley(PV)value is better thanλ/4(λ=632.8 nm)and the root mean square(RMS)value is better thanλ/22 in the working temperature range of(20±5)℃.A ZYGO laser interferometer is used for testing the mirror surface shape,and the test results show that the PV value of the tip-tilt mirror surface shape is better thanλ/4 and the root mean square(RMS)value is better thanλ/29 in the temperature range of(20±5)℃.These results are better than tip-tilt mirror surface shape RMS value ofλ/15 and meet the laser communication antenna requirement.
引文
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[2]Jiang Huilin,Jiang Lun,Song Yansong,et al.Research of optical and APT technology in one-point to multi-point simultaneous space laser communication system[J].Chinese J Lasers,2015,42(4):0405008.姜会林,江伦,宋延嵩,等.一点对多点同时空间激光通信光学跟瞄技术研究[J].中国激光,2015,42(4):0405008.
[3]Wang Zhongsu,Zhai Yan,Mei Gui,et al.Design of flexible support structure of reflector in space remote sensor[J].Optics and Precision Engineering,2010,18(8):1833-1841.王忠素,翟岩,梅贵,等.空间光学遥感器反射镜柔性支撑的设计[J].光学精密工程,2010,18(8):1833-1841.
[4]Bao Qihong,Sha Wei,Chen Changzheng,et al.Characteristics of rear support in centre for space SiC mirror[J].Acta Photonica Sinica,2017,46(2):0222003.包奇红,沙巍,陈长征,等.空间SiC反射镜背部中心支撑特性研究[J].光子学报,2017,46(2):0222003.
[5]Li Haixing,Ding Yalin,Zhang Hongwen.Support system study of rectangular mirror[J].Acta Optica Sinica,2015,35(5):0523002.李海星,丁亚林,张洪文.矩形反射镜结构支撑技术研究[J].光学学报,2015,35(5):0523002.
[6]Xu Xinxing,Gao Yunguo,Yang Hongbo,et al.Large-diameter fast steering mirror on rigid support technology for dynamic platform[J].Optics and Precision Engineering,2014,22(1):117-124.徐新行,高云国,杨洪波,等.车载大口径刚性支撑式快速反射镜[J].光学精密工程,2014,22(1):117-124.
[7]Dong Deyi,Li Zhilai,Li Ruigang,et al.Simulation and experiment of influence of adhesive curing on reflective mirror surface[J].Optics and Precision Engineering,2014,22(10):2698-2707.董得义,李志来,李锐钢,等.胶层固化对反射镜面形影响的仿真与试验[J].光学精密工程,2014,22(10):2698-2707.
[8]Zhou Ziyun,Gao Yunguo,Shao Shuai,et al.Design of fast steering mirror using flexible hinge[J].Optics and Precision Engineering,2014,22(6):1547-1554.周子云,高云国,邵帅,等.采用柔性铰链的快速反射镜设计[J].光学精密工程,2014,22(6):1547-1554.
[9]Qi Guang,Wang Shuxin,Li Jinglin.Design of high volume fraction SiC/Al composite mirror in space remote sensor[J].Chinese Optics,2015,8(1):99-106.齐光,王书新,李景林.空间遥感器高体份SiC/Al复合材料反射镜组件设计[J].中国光学,2015,8(1):99-106.
[10]Jia Shuqiang,Huang Wei,Pang Wubin.Influence of adhesive thickness on surface deformation of mirror supported by three-point mount[J].Optics and Precision Engineering,2015,23(7):2005-2012.贾树强,黄玮,庞武斌.胶层厚度对三点支撑反射镜面形的影响[J].光学精密工程,2015,23(7):2005-2012.
[11]Liu Qiang,He Xin,Zhang Feng,et al.Calculation and control of adhesive layer in reflector athermal mount[J].Optics and Precision Engineering,2012,20(10):2229-2236.刘强,何欣,张峰,等.反射镜无热装配中胶层厚度的计算及控制[J].光学精密工程,2012,20(10):2229-2236.
[12]Yoder Jr P R.Opto-mechanical systems design[M].Florida:CRC Press,2005:396-398.