Panoramic fringe projection by using a conical mirror

Víctor H. Flores; Luciana Casaletto; Katia Genovese; Juan A. Rayas; Amalia Martinez

doi:10.1117/12.2021677

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18 November 2013 Panoramic fringe projection by using a conical mirror

Víctor H. Flores, Luciana Casaletto, Katia Genovese, Juan A. Rayas, Amalia Martinez

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Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 87859M (2013) https://doi.org/10.1117/12.2021677
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

Abstract

In this work, we present a novel Panoramic Fringe Projection system (PFP) to retrieve the three-dimensional topography of quasi-cylindrical objects along their full length and around the entire circumference. The proposed procedure uses a 45° concave conical mirror to project a circular sinusoidal fringe pattern onto a specimen placed coaxially to the mirror and at the same time to image the modulated fringe pattern diffused from the object surface. In order to obtain the required sensitivity, an axicon is used to create a divergent fringe pattern with constant pitch. By processing the phase map, information on the radius over the full 360° surface of the sample can be obtained by using a single-view series of images captured from a single camera. To verify the feasibility of the PFP technique, a tubular sample with shape discontinuities has been tested. The proposed method demonstrated to be able to retrieve the accurate topography of quasi-axial-symmetric samples with complex geometries for a large variety of applications.

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Víctor H. Flores, Luciana Casaletto, Katia Genovese, Juan A. Rayas, and Amalia Martinez "Panoramic fringe projection by using a conical mirror", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 87859M (18 November 2013); https://doi.org/10.1117/12.2021677

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