OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 7 — Mar. 1, 2002
  • pp: 1323–1329

Optical in-plane strain field sensor

Per Synnergren and Mikael Sjödahl  »View Author Affiliations


Applied Optics, Vol. 41, Issue 7, pp. 1323-1329 (2002)
http://dx.doi.org/10.1364/AO.41.001323


View Full Text Article

Acrobat PDF (357 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A whole-field speckle strain sensor is presented. The speckle strain sensor allows the measurement of all three in-plane components of the strain field simultaneously without touching the surface of the sample. The strain fields are extracted from the in-plane motion of defocused laser speckles in a telecentric imaging system. To distinguish the contribution to the speckle motion from surface translation, rotation, and strain, the speckle motion from three lasers with different illumination directions and wavelengths has to be analyzed separately. Simultaneous acquisition of the three individual speckle patterns is achieved by means of splitting the light from the lasers onto separate but synchronized detectors with the aid of dichroic mirrors. The motion of the speckles is calculated with digital speckle photography (speckle correlation), which enables the strain sensor to measure strain fields with noise levels as low as 10 μstrain.

© 2002 Optical Society of America

OCIS Codes
(110.6150) Imaging systems : Speckle imaging
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments

Citation
Per Synnergren and Mikael Sjödahl, "Optical in-plane strain field sensor," Appl. Opt. 41, 1323-1329 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-7-1323


Sort:  Author  |  Year  |  Journal  |  Reset

References

  1. D. J. Segalman, D. B. Woyak, and R. E. Rowlands, “Smooth spline-like finite-element differentiation of full-field experimental data over arbitrary geometry,” Exp. Mech. 19, 429–437 (1979).
  2. M. A. Sutton, J. L. Turner, H. A. Bruck, and T. A. Chae, “Full-field representation of sampled surface deformation for displacement and strain analysis,” Exp. Mech. 31, 168–177 (1991).
  3. Y. Y. Hung and C. Y. Liang, “Image-shearing camera for direct measurement of surface strains,” Appl. Opt. 18, 1046–1051 (1979).
  4. R. Kästle, E. Hack, and U. Sennhauser, “Multiwavelength shearography for quantitative measurements of two-dimensional strain distributions,” Appl. Opt. 38, 96–100 (1999).
  5. P. K. Rastogi, “Direct determination of large in-plane strains using high-resolution moiré,” Opt. Lasers Eng. 29, 97–102 (1998).
  6. P. K. Rastogi, “Determination of surface strains by speckle shear photography,” Opt. Lasers Eng. 29, 103–116 (1998).
  7. I. Yamaguchi, “A laser-speckle strain gauge,” J. Phys. E 14, 1270–1273 (1981).
  8. M. Sjödahl, “Electronic speckle photography: measurement of in-plane strain fields using defocused laser speckle,” Appl. Opt. 34, 5799–5808 (1995).
  9. P. Johnson, “Strain field measurements with dual-beam digital speckle photography,” Opt. Lasers Eng. 30, 315–326 (1998).
  10. M. Sjödahl, “Accuracy in electronic speckle photography,” Appl. Opt. 36, 2875–2885 (1997).
  11. M. Sjödahl, “Digital speckle photography,” in Digital Speckle Pattern Interferometry and Related Techniques, P. K. Rastogi, ed. (Wiley, Chichester, UK, 2001), CHAP 5, 289–336.

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited