| 激光干涉条纹锁定系统测量地面低频振动谱 |
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| 引用本文： | 易迎彦,刘德明.激光干涉条纹锁定系统测量地面低频振动谱[J].激光与红外,2011,41(4):394-397. |
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| 作者姓名： | 易迎彦 刘德明 |
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| 作者单位： | 1. 武汉理工大学理学院物理系,湖北,武汉,430070;华中科技大学光电子科学与工程学院,湖北,武汉,430074
2. 华中科技大学光电子科学与工程学院,湖北,武汉,430074 |
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| 摘 要： | 地面振动噪声是在地面高精度实验中一个重要的误差来源,安静环境下地面振动噪声水平的幅度为纳米量级,通常干涉仪无法直接测量.设计并制作用于了纳米精度测量的激光干涉仪反馈控制系统,该系统由激光器及稳频装置、干涉系统、检测及控制电路和位移反馈执行机(压电陶瓷)组成.采用一个长周期的折叠摆对水平方向0.3 Hz以下的振动频率进行...
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| 关 键 词： | 激光干涉仪 折叠摆 低频振动 反馈控制 |
Low-frequency seismic spectrum measured by a laser interference fringe locking system |
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| YI Ying-yan,LIU De-ming.Low-frequency seismic spectrum measured by a laser interference fringe locking system[J].Laser & Infrared,2011,41(4):394-397. |
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| Authors: | YI Ying-yan LIU De-ming |
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| Affiliation: | Department of Physics,School of Science,Wuhan University of Technology,Wuhan 430070,China;College of Opto-electronic Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China |
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| Abstract: | Seismic noise is one of the crucial problems for terrestrial precision experiment.It can not be measured by the general interferometric method because the seismic noise usually has the level of nanometer.A laser in interferometer control system,which consists of a laser interferometer,a detector,a control circuit,and a displacement feedback actuator (piezoelectric ceramic),has been built up.The low-frequency (0.3~3 Hz) seismic noise level is measured using the lock-in laser interferometer combined with a long period folded pendulum.The results show that the maximum vibration noise level is 10-9m/Hz at 1 Hz. |
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| Keywords: | laser interference folded pendulum seismic noise feedback control |
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