中国物理B ›› 2001, Vol. 10 ›› Issue (8): 730-734.doi: 10.1088/1009-1963/10/8/312

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A SENSITIVE AND STABLE CONFOCAL FABRY－PéROT INTERFEROMETER FOR SURFACE ULTRASONIC VIBRATION DETECTION

陈赓华1, 丁红胜2, 童莉葛3   

  1. (1)Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; (2)Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; Department of Physics, University of Science and Technology, Beijing 100083, China; (3)Mechanical Engineering School, University of Science and Technology, Beijing 100083, China
  • 收稿日期:2001-03-02 修回日期:2001-02-23 出版日期:2001-08-15 发布日期:2005-06-12
  • 基金资助:
    Project supported in part by the Ministry of Science and Technology of China (NKBRSF-G 19990646).

A SENSITIVE AND STABLE CONFOCAL FABRY－PéROT INTERFEROMETER FOR SURFACE ULTRASONIC VIBRATION DETECTION

Ding Hong-sheng (丁红胜)ab, Tong Li-ge (童莉葛)c, Chen Geng-hua (陈赓华)a   

  1. a Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Department of Physics, University of Science and Technology, Beijing 100083, China; c Mechanical Engineering School, University of Science and Technology, Beijing 100083, China
  • Received:2001-03-02 Revised:2001-02-23 Online:2001-08-15 Published:2005-06-12
  • Supported by:
    Project supported in part by the Ministry of Science and Technology of China (NKBRSF-G 19990646).

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摘要： A new confocal Fabry－Pérot interferometer (CFPI) has been constructed. By using both of the conjugate rays, the sensitivity of the system was doubled. Moreover, the negative feedback control loop of a single-chip microcomputer (MCS-51) was applied to stabilize the working point at an optimum position. The system has been used in detecting the piezoelectric ultrasonic vibration on the surface of an aluminium sample.

Abstract: A new confocal Fabry－Pérot interferometer (CFPI) has been constructed. By using both of the conjugate rays, the sensitivity of the system was doubled. Moreover, the negative feedback control loop of a single-chip microcomputer (MCS-51) was applied to stabilize the working point at an optimum position. The system has been used in detecting the piezoelectric ultrasonic vibration on the surface of an aluminium sample.

Key words: confocal Fabry－Pérot interferometer, ultrasonic detection, sensitivity, stability

中图分类号:  (Interferometers)

  • 07.60.Ly
81.70.Fy (Nondestructive testing: optical methods) 43.35.Yb (Ultrasonic instrumentation and measurement techniques) 43.38.Fx (Piezoelectric and ferroelectric transducers) 42.62.Eh (Metrological applications; optical frequency synthesizers for precision spectroscopy) 42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation)