Three-dimensional surface contouring of macroscopic objects by means of phase-difference images
Fecha
2006-04-16
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OSA
Resumen
We report a technique to determine the 3D contour of objects with dimensions of at least 4 orders of magnitude larger than the illumination optical wavelength. Our proposal is based on the numerical reconstruction of the optical wave field of digitally recorded holograms. The required modulo 2 phase map in any contouring process is obtained by means of the direct subtraction of two phase-contrast images under different illumination angles to create a phase-difference image of a still object. Obtaining the phase-difference images is only possible by using the capability of numerical reconstruction of the complex optical field provided by digital holography. This unique characteristic leads us to a robust, reliable, and fast procedure that requires only two images. A theoretical analysis of the contouring system is shown, with verification by means of numerical and experimental results. © 2006 Optical Society of America
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Reconstrucción 3D
Citación
Daniel Velásquez Prieto and Jorge Garcia-Sucerquia, "Three-dimensional surface contouring of macroscopic objects by means of phase-difference images," Appl. Opt. 45, 6381-6387 (2006) http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-25-6381