Experimental Mechanics

, Volume 44, Issue 2, pp 128–135 | Cite as

Design and evaluation of the poleidoscope: A novel digital polariscope

  • J. Lesniak
  • S. J. Zhang
  • E. A. Patterson


The goal of recent research in digital photoelasticity has been fast, reliable, and accurate full-field photoelastic data that will allow the technique to play a valued role in assessing material and structural integrity. A novel design for a polariscope that allows simultaneous capture of multiple images is described, and a prototype instrument is evaluated using both transmission and reflection photoelasticity. The design offers the potential for real-time data acquisition and processing of high-speed events, using a number of different approaches to digital photoelasticity. The evaluation of the instrument arranged for the phase-stepping method demonstrated that it was capable of providing results of comparable quality and accuracy to manual analysis and more conventional methods of acquiring phase-stepped images.

Key Words

Digital photoelasticity poleidoscope ellipsometry 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Ramesh, K., Digital photoelasticity—Advanced Techniques and Applications, Springer-Verlag, Berlin (2000).Google Scholar
  2. 2.
    Cloud, G., Optical Methods of Engineering Analysis, Cambridge University Press, Cambridge (1995).Google Scholar
  3. 3.
    Zandman, F., Redner, S., andDally, J.W., Photoelastic Coatings, SESA Monograph, No. 3, Iowa State University Press, Ames. (1977).Google Scholar
  4. 4.
    Fessler, H., “An Assessment of Frozen Stress Photoelasticity,”Journal of Strain Analysis,27,123–126 (1992).Google Scholar
  5. 5.
    Ajovalasit, A., Barone, S., andPetrucci, G., “Towards RGB Photoelasticity: Full-field Automated Photoelasticity in White Light”, EXPERIMENTAL MECHANICS,35,193–200 (1995).CrossRefGoogle Scholar
  6. 6.
    Buckberry, C. andTowers, D., “New Approaches to the Full-field Analysis of Photoelastic Fringe Patterns”,Optics and Lasers in Engineering,24,415–428 (1996).CrossRefGoogle Scholar
  7. 7.
    Ajolavisit, A., Barone, S., andPetrucci, G., “A Review of Automated Methods for the Collection and Analysis of Photoelastic Data,”Journal of Strain Analysis,33 (2),75–92 (1998).CrossRefGoogle Scholar
  8. 8.
    Patterson, E.A. andWang, Z.F., “Simultaneous Observation of Phasestepped Images for Automated Photoelasticity,”Journal of Strain Analysis,33 (1),1–18 (1998).CrossRefGoogle Scholar
  9. 9.
    Hobbs, J.W., Greene, R.J., andPatterson, E.A.A Novel Instrument for Dynamic Photoelasticity,” EXPERIMENTAL MECHANICS,43, (4),403–409 (2003).See also experimentalstress. com for dynamic results.Google Scholar
  10. 10.
    Lesniak, J.R. and Zickel, M.J., “Applications of Automated Grey-field Polariscope,” in Proceedings of the SEM Spring Conference on Experimental and Applied Mechanics, Houston, TX, 298–301 (1998).Google Scholar
  11. 11.
    Lesniak, J.R., “Status Report on Grey-field Polariscope,” in Proceedings of the Annual SEM Conference on Experimental and Applied Mechanics, Portland, Oregon, 836–838 (2001).Google Scholar
  12. 12.
    Ji, W. andPatterson, E.A.Simulation of Errors in Automated Photoelasticity,” EXPERIMENTAL MECHANICS,38 (2),132–139 (1998).CrossRefGoogle Scholar
  13. 13.
    Wang, Z.F. andPatterson, E.A., “Use of Phase Stepping with Demodulation and Fuzzy Sets for Birefringence Measurement,”Optics and Lasers in Engineering,22,91–104 (1995).CrossRefGoogle Scholar
  14. 14.
    Patterson, E.A. andWang, Z.F., “Towards Full-field Automated Photoelastic Analysis of Complex Components,”Strain,27 (2),49–56 (1991).Google Scholar
  15. 15.
    Patterson, E.A., “Digital Photoelasticity: Principles, Practice And Potential,”Strain,38,27–39 (2002).CrossRefGoogle Scholar
  16. 16.
    Den Hartog, J.P., Advanced Strength of Materials, Dover, New York (1952).Google Scholar
  17. 17.
    Haake, S.J., Wang, Z.F., andPatterson, E.A., “Evaluation of Full-field Automated Photoelastic Analysis Based on Phase-stepping,”Experimental Techniques,17 (6),19–25 (1993).Google Scholar
  18. 18.
    Frocht, M.M., Photoelasticity, Vol. I, Chapters 5 and 6, Wiley, New York (1941).Google Scholar
  19. 19.
    Tamrakar, D.K. andRamesh, K., “Simulation of Error in Digital Photoelasticity by Jones Calculus,”Strain,37 (3),105–112 (2001).CrossRefGoogle Scholar
  20. 20.
    Zhang, S.J. and Patterson, E.A., “Image Enhancement in Digital Reflection Photoelasticity Using a Butterworth Filter,” in Proceedings of the SEM IX International Congress on Experimental Mechanics, 865–868 (2000).Google Scholar
  21. 21.
    Ramesh, K. andGanapathy, V., “Phase-shifting Methodologies in Photoelastic Analysis—The Application of Jones Calculus,”Journal of Strain Analysis,31 (6),423–432 (1996).Google Scholar

Copyright information

© Society for Experimental Mechanics 2004

Authors and Affiliations

  • J. Lesniak
    • 1
  • S. J. Zhang
    • 2
  • E. A. Patterson
    • 2
  1. 1.Stress Photonics IncMadisonUSA
  2. 2.Department of Mechanical EngineeringUniversity of SheffieldSheffieldUK

Personalised recommendations