A sensitive and stable confocal Fabry-Perot interferometer for surface ultrasonic vibration detection

Authors
Ding, HS Tong, LG Chen, GH
Citation
Hs. Ding et al., A sensitive and stable confocal Fabry-Perot interferometer for surface ultrasonic vibration detection, CHIN PHYS, 10(8), 2001, pp. 730-734
Citations number
6
Categorie Soggetti
Physics
Journal title
CHINESE PHYSICS
ISSN journal
10091963 → ACNP
Volume
10
Issue
8
Year of publication
2001
Pages
730 - 734
Database
ISI
SICI code
1009-1963(200108)10:8<730:ASASCF>2.0.ZU;2-#
Abstract
A new confocal Fabry-Perot interferometer (CFPI) has been constructed. By u sing both of the conjugate rays, the sensitivity of the system was doubled. Moreover, the negative feedback control loop of a single-chip microcompute r (MOS-51) was applied to stabilize the working point at an optimum positio n. The system has been used in detecting the piezoelectric ultrasonic vibra tion on the surface of an aluminium sample.