地月激光测距角反射器研制进展  

Progress on the design of retroreflector for lunar laser ranging

作　　者：刘祺[1] 何芸 段会宗 叶贤基 徐家豪 艾凌皓 LIU Qi;HE Yun;DUAN Huizong;YEH Hsienchi;XU Jiahao;AI Linghao(MOE Key Laboratory of TianQin Mission,TianQin Research Center for Gravitational Physics&School of Physics and Astronomy,Frontiers Science Center for TianQin,CNSA Research Center for Gravita-tional Waves,Sun Yat-sen University(Zhuhai Campus),Zhuhai 519082,China;School of Electronic Information,Wuhan University,Wuhan 430072,China;State Observatory for Atmospheric Remote Sensing,Wuhan 430072,China)

机构地区：[1]“天琴计划”教育部重点实验室,中山大学天琴中心&物理与天文学院,天琴前沿科学中心,国家航天局引力波研究中心,广东珠海519082 [2]武汉大学电子信息学院,湖北武汉430072 [3]武汉大气遥感国家野外科学观测研究站,湖北武汉430072

出　　处：《中山大学学报（自然科学版）》2021年第1期239-246,共8页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省基础与应用基础重大项目(2019B030302001);国家自然科学基金(11655001)。

摘　　要：月球激光测距在广义相对论的检验以及地月系统的理解上做出了巨大贡献。然而由于月球天平动效应的影响,约50年前安置在月球上的阵列式角反射器将单个回波光子对应的测距精度限制在了厘米级的水平。为了进一步提升测距精度,需要部署新一代单体大孔径的激光角反射器。本文主要介绍我们170 mm有效孔径的中空激光角反射器的研制进展。测试结果表明,我们实现了空心激光角反射器三个二面角的精度分别为0.10″,0.30″和0.24″。远场衍射图样模拟表明,该样机能够达到理想Apollo 11/14反射器阵列68.5%返回信号强度。我们期望这种空心激光角反射器可以应用于新一代的月球激光测距。Lunar laser ranging has made great contributions to the tests of general relativity and the understanding of the Earth-Moon system.However,because of the lunar libration,corner cube retroreflector arrays installed on the Moon about 50 years ago currently limit the laser-ranging precision for a single photon received to centimeter level.Here we mainly introduce the latest progress of developing a 170 mm aperture single and hollow corner cube retroreflector.The measurement shows that three dihedral angle offsets realize 0.10,0.30,and 0.24 arcsec,respectively.According to the simulation of far field diffraction pattern,this prototype can achieve about 68.5%optical intensity reflected from ideal Apollo 11 or 14 arrays.We anticipate that this hollow corner cube retroreflector can be applied to the next generation lunar laser ranging.

关 键 词：地月激光测距 激光角反射器 

分 类 号：O435.1[机械工程—光学工程]