Experimental Mechanics

, Volume 12, Issue 5, pp 216–222 | Cite as

Application of profile projectors to moiré analysis

Attachment of adjustable screen grids in the image plane of two profile projectors makes them sensitive and accurate instruments for moiré measurements in the elastic range of most materials
  • A. R. Luxmoore


Two profile projectors have been modified for moiré applications by the addition of adjustable screens which contain magnified master grids. The instruments have been examined for any errors they may introduce into the measurements and the screen adjustments have been calibrated. Their use and application are described briefly.


Mechanical Engineer Fluid Dynamics Profile Projector Master Grid Adjustable Screen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



pitch of specimen grid before straining


change in pitch of specimen grid


pitch of magnified specimen grid


pitch of master grid in image plane


basic magnification of optical system


change in magnification of optical system


mismatch strain


fringe spacing in image plane


strain in specimen


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  1. 1.
    Dantu, P., “Investigating Deformation by Means of Gratings,” Ann. Inst. Techn. du Bat. et des Trav. Publics, (121), 78 (C.E.G.B. translation No. 3089), (1958).Google Scholar
  2. 2.
    Chiang, F. P., “A Method to Increase the Accuracy of Moiré Method,”J. Engg. Mech. Div., Proc. A.S.C.E.,91,137 (1965).Google Scholar
  3. 3.
    Luxmoore, A. R. andEder, W. E., “Modifying a Profile Projector for Strain Measurements Using the Moiré Technique,”J. Sci. Inst.,44,908 (1967).CrossRefGoogle Scholar
  4. 4.
    Luxmoore, A. R., “Applications of the Telecentric Principle in Optical Strain Measurements,” Proc. conf. on Recent Advances in Stress Analysis, Roy. Aero. Soc., London, 5–19 (March 1968).Google Scholar
  5. 5.
    Holister, G. S. andWatts, D., “Telecentric Systems for Moiré Analysis,”Experimental Mechanics,10 (1),31–38 (1970).CrossRefGoogle Scholar
  6. 6.
    Holister, G. S. andLuxmoore, A. R., “Production of High-density Moiré Grids,Experimental Mechanics,8 (5),210–216 (1968).CrossRefGoogle Scholar
  7. 7.
    Zandman, F., Holister, G. S. andBrcic, V., “The Influence of Grid Geometry on Moiré Fringe Properties,”J. Strain Anal.,1,1 (1965).Google Scholar
  8. 8.
    Post, D., “Sharpening and Multiplication of Moiré Fringes,”Experimental Mechanics,7 (4),154–159 (1967).CrossRefGoogle Scholar
  9. 9.
    Luxmore, A. R. and House, C., “Utilisation of Diffraction Effects in Moiré Strain Analysis.” To be published.Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1972

Authors and Affiliations

  • A. R. Luxmoore
    • 1
  1. 1.Department of Civil EngineeringUniversity CollegeSwanseaUK

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