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| 共焦法布里珀罗干涉仪灵敏度和稳定性研究 | |
| 引用本文： | 丁红胜,童莉葛,尹红,龚育良.共焦法布里珀罗干涉仪灵敏度和稳定性研究[J].北京科技大学学报,2001,23(5):445-448. |
| 作者姓名： | 丁红胜 童莉葛 尹红 龚育良 |
| 作者单位： | 1. 中国科学院低温中心;北京科技大学物理系 2. 北京科技大学机械工程学院 3. 北京科技大学物理系 |
| 摘 要： | 共焦法布里－珀罗干涉仪（Confocal Fabry-Perot Interferometer,CFPI）是用光学方法探测固体表面超声振动的解调器件，它的灵敏度和稳定性决定了整个系统的灵敏度和稳定性。通过使用干涉仪的共轭输入光，使系统探测超声振动的灵敏度可提高至少2倍；同时详细给出通过干涉环来粗调干涉仪的共焦点，并提出使用单片机（MCS－51）反馈控制系统来稳定最佳工作点的方法。利用该系统实现了对铝样品表面压电超声振动的检测，得到了较好的实验结果。 |
| 关 键 词： | 共焦法布里－珀罗干涉仪 超声振动探测 灵敏度 稳定性 |
| 修稿时间： | 2001年1月12日 |
Methods to Improve the Sensitivity and Stability of CFPI for Surface Ultrasonic Vibration Detection |
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| DING Hongsheng TONG Lige,GONG Yuliang Cryogenic Center,Chinese Acadymy of Science,Beijing.Methods to Improve the Sensitivity and Stability of CFPI for Surface Ultrasonic Vibration Detection[J].Journal of University of Science and Technology Beijing,2001,23(5):445-448. | |
| Authors: | DING Hongsheng TONG Lige GONG Yuliang Cryogenic Center Chinese Acadymy of Science Beijing |
| Institution: | DING Hongsheng TONG Lige,GONG Yuliang 1)Cryogenic Center,Chinese Acadymy of Science,Beijing 100080 2)Department of Physics,UST seijing,Beijing 100083 3)Mechanical Engineering School,UST Beijing Beijing 100083 |
| Abstract: | Confocal Fabry-Perot Interferometer (CFPI) is the demdulation device for surfce ultrasonic vibration detection. Its sensitivity and stability play very driportant roles in whole system. In this paper, a new detection system is introduced. By using both conjugate rays, the system sensitivity is doubled. Moreover, a single chip microcomputer (MCS-51) feedback control loop is applied to stabilize the working point at opti- mum position. The system has performed in detecting piezoelectric ultrasonic on surface of an aluminum sam- ple. |
| Keywords: | Confocal Fabry-Perot Interferometer (CFPI) ultrasonic vibraion deection sensitivity stability |
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