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Title: Imaging photorefractive optical vibration measurement method and device

Abstract

A method and apparatus are disclosed for characterizing a vibrating image of an object of interest. The method includes providing a sensing media having a detection resolution within a limited bandwidth and providing an object of interest having a vibrating medium. Two or more wavefronts are provided, with at least one of the wavefronts being modulated by interacting the one wavefront with the vibrating medium of the object of interest. The another wavefront is modulated such that the difference frequency between the one wavefront and the another wavefront is within a response range of the sensing media. The modulated one wavefront and another wavefront are combined in association with the sensing media to interfere and produce simultaneous vibration measurements that are distributed over the object so as to provide an image of the vibrating medium. The image has an output intensity that is substantially linear with small physical variations within the vibrating medium. Furthermore, the method includes detecting the image. In one implementation, the apparatus comprises a vibration spectrum analyzer having an emitter, a modulator, sensing media and a detector configured so as to realize such method. According to another implementation, the apparatus comprises a vibration imaging device.

Inventors:
 [1];  [1];  [2]
  1. (Idaho Falls, ID)
  2. (Los Alamos, NM)
Issue Date:
Research Org.:
Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
OSTI Identifier:
873321
Patent Number(s):
6134006
Assignee:
Becthel BWXT Idaho, LLC (Idaho Falls, ID) INEEL
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
imaging; photorefractive; optical; vibration; measurement; method; device; apparatus; disclosed; characterizing; vibrating; image; providing; sensing; media; detection; resolution; limited; bandwidth; medium; wavefronts; provided; modulated; interacting; wavefront; difference; frequency; response; range; combined; association; interfere; produce; simultaneous; measurements; distributed; provide; output; intensity; substantially; linear; physical; variations; furthermore; detecting; implementation; comprises; spectrum; analyzer; emitter; modulator; detector; configured; realize; according; substantially linear; spectrum analyzer; imaging device; apparatus comprises; difference frequency; sensing media; response range; apparatus comprise; limited bandwidth; output intensity; measurement method; optical vibration; detector configured; refractive optical; detection resolution; /356/

Citation Formats

Telschow, Kenneth L., Deason, Vance A., and Hale, Thomas C. Imaging photorefractive optical vibration measurement method and device. United States: N. p., 2000. Web.
Telschow, Kenneth L., Deason, Vance A., & Hale, Thomas C. Imaging photorefractive optical vibration measurement method and device. United States.
Telschow, Kenneth L., Deason, Vance A., and Hale, Thomas C. Sat . "Imaging photorefractive optical vibration measurement method and device". United States. https://www.osti.gov/servlets/purl/873321.
@article{osti_873321,
title = {Imaging photorefractive optical vibration measurement method and device},
author = {Telschow, Kenneth L. and Deason, Vance A. and Hale, Thomas C.},
abstractNote = {A method and apparatus are disclosed for characterizing a vibrating image of an object of interest. The method includes providing a sensing media having a detection resolution within a limited bandwidth and providing an object of interest having a vibrating medium. Two or more wavefronts are provided, with at least one of the wavefronts being modulated by interacting the one wavefront with the vibrating medium of the object of interest. The another wavefront is modulated such that the difference frequency between the one wavefront and the another wavefront is within a response range of the sensing media. The modulated one wavefront and another wavefront are combined in association with the sensing media to interfere and produce simultaneous vibration measurements that are distributed over the object so as to provide an image of the vibrating medium. The image has an output intensity that is substantially linear with small physical variations within the vibrating medium. Furthermore, the method includes detecting the image. In one implementation, the apparatus comprises a vibration spectrum analyzer having an emitter, a modulator, sensing media and a detector configured so as to realize such method. According to another implementation, the apparatus comprises a vibration imaging device.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

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