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Chinese Physics, 2001, Vol. 10(8): 730-734    DOI: 10.1088/1009-1963/10/8/312
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

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
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
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.
Keywords:  confocal Fabry-Pérot interferometer      ultrasonic detection      sensitivity      stability  
Received:  02 March 2001      Revised:  23 February 2001      Accepted manuscript online: 
PACS:  07.60.Ly (Interferometers)  
  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)  
Fund: Project supported in part by the Ministry of Science and Technology of China (NKBRSF-G 19990646).

Cite this article: 

Ding Hong-sheng (丁红胜), Tong Li-ge (童莉葛), Chen Geng-hua (陈赓华) A SENSITIVE AND STABLE CONFOCAL FABRY-PéROT INTERFEROMETER FOR SURFACE ULTRASONIC VIBRATION DETECTION 2001 Chinese Physics 10 730

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