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Applied Optics

Applied Optics


  • Vol. 22, Iss. 6 — Mar. 15, 1983
  • pp: 850–855

Projection moire with moving gratings for automated 3-D topography

M. Halioua, R. S. Krishnamurthy, H. Liu, and F. P. Chiang  »View Author Affiliations

Applied Optics, Vol. 22, Issue 6, pp. 850-855 (1983)

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A method is presented that permits a vast increase in the capability of projection moire topography. It involves simultaneous translation of the reference and object gratings to generate high-definition contour fringes without any of the artifacts associated with ordinary moire. Experimental results are presented for single- and double-projection arrangements for a general 3-D object and an inclined-plane test surface. Clear contouring fringes for angles of inclination up to 80° are shown, and fringe densities higher than the grating frequency are obtained. Coupled with the flexibility of projection moire, this technique is shown to be particularly suited for computer-assisted moire fringe pattern analysis. Means of practical implementation in on-line processing system are proposed.

© 1983 Optical Society of America

Original Manuscript: September 21, 1982
Published: March 15, 1983

M. Halioua, R. S. Krishnamurthy, H. Liu, and F. P. Chiang, "Projection moire with moving gratings for automated 3-D topography," Appl. Opt. 22, 850-855 (1983)

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