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Proceedings Paper

Novel approach to estimate fringe order in Moire profilometry
Author(s): Mahesh Kondiparthi
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Paper Abstract

A novel approach to estimate fringe order in Moire topography is proposed. Along with the light source used to create shadow of the grating on the object (as in conventional moiré), proposed method uses a second light source which illuminates the object with color bands from the side. Width of each colored band is set to match that height which leads to a 2π phase shift in moiré fringes. This facilitates one to rule the object with colored bands, which can be used to estimate fringe order using a color camera with relatively low spatial resolution with out any compromise in height sensitivity. Current proposal facilitates one to extract 3D profile of objects with surface discontinuities. It also deals with the possible usage of moiré topography (when combined with the proposed method) in extracting 3D surface profile of many objects with height discontinuities using a single 2D image. Present article deals with theory and simulations of this novel side illumination based approach.

Paper Details

Date Published: 14 May 2010
PDF: 9 pages
Proc. SPIE 7690, Three-Dimensional Imaging, Visualization, and Display 2010 and Display Technologies and Applications for Defense, Security, and Avionics IV, 769014 (14 May 2010); doi: 10.1117/12.858620
Show Author Affiliations
Mahesh Kondiparthi, Indian Institute of Science (India)


Published in SPIE Proceedings Vol. 7690:
Three-Dimensional Imaging, Visualization, and Display 2010 and Display Technologies and Applications for Defense, Security, and Avionics IV
Bahram Javidi; Jung-Young Son; John Tudor Thomas; Daniel D. Desjardins, Editor(s)

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