Title :
Speckle methodology with liquid crystal television and position sensitive device
Author :
Okada, E. ; Enomoto, H. ; Minamitani, H.
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
Speckle photography is a simple and versatile technique to derive deformation and strain in solid mechanics except for the tedious developing process of a photographic film. Since a liquid crystal television (LC-TV) has the function of a spatial light modulator just like a photographic film, the LC-TV can be used instead of a photographic film in the speckle metrology. Electronic speckle methodology can be expected to reduce the processing time. In this study, utilization of LC-TV to the speckle methodology and a new method of automatic Young´s fringe analysis with LC-TV and a position sensitive device (PSD) are proposed. Results of preliminary experiments proved the efficiency of utilizing the LC-TV and PSD for the speckle methodology
Keywords :
displacement measurement; electronic speckle pattern interferometry; light interferometry; liquid crystal displays; spatial light modulators; speckle; strain measurement; television applications; Young´s fringe analysis; deformation; electronic speckle methodology; liquid crystal television; photographic film; position sensitive device; processing time; solid mechanics; spatial light modulator; speckle metrology; strain; Adaptive optics; Displacement measurement; Liquid crystal devices; Optical films; Optical filters; Optical recording; Optical sensors; Photography; Speckle; TV;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1994. IECON '94., 20th International Conference on
Conference_Location :
Bologna
Print_ISBN :
0-7803-1328-3
DOI :
10.1109/IECON.1994.397905
