PHOTOREFRACTIVE CORRELATION FILTERING OF TIME-VARYING LASER SPECKLES FOR VIBRATION MONITORING

Citation
Aa. Kamshilin et al., PHOTOREFRACTIVE CORRELATION FILTERING OF TIME-VARYING LASER SPECKLES FOR VIBRATION MONITORING, Applied physics letters, 73(11), 1998, pp. 1466-1468
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
0003-6951
Volume
73
Issue
11
Year of publication
1998
Pages
1466 - 1468
Database
ISI
SICI code
0003-6951(1998)73:11<1466:PCFOTL>2.0.ZU;2-L
Abstract
We proposed and experimentally studied a technique of vibration object monitoring. The technique is based on self-diffraction of the speckle pattern on the adaptive correlation filter recorded in photorefractiv e Bi12TiO20 crystal. This filter is recorded owing to the light-induce d scattering known as fanning effect. The proposed technique is as sen sitive as interferometric systems and it is very simple for implementa tion: neither reference nor readout beam is needed for operation. It i s shown that the system has a linear response on the lateral displacem ent of the object surface and its dynamic range can be easily varied d epending on experimental conditions. (C) 1998 American Institute of Ph ysics.