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Proceedings Paper

Optical digital spherometer based in structured light perfilometry
Author(s): Valentin Sarmiento; N. Mauricio; M. Zamalloa; M. Asmad; Guillermo Baldwin-Olguin
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Paper Abstract

In this work, it is present a spherometer based in grating projection techniques and phase evaluation. The optical setup consists in a projector with a Ronchi ruling and a CCD camera interface d with an image processor. The CCD camera registers the images of the fringe-pattern as modulated by the object curvature and purposely-developed software digitally processes these images. The object profile is reconstructed using phase evaluation methods: particularly, were used the fast Fourier transform algorithm and phase stepping algorithms, With the resulting values and using the sagitta calculation the average radius of curvature can be evaluated in any point on the object surface.

Paper Details

Date Published: 14 August 2001
PDF: 4 pages
Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); doi: 10.1117/12.437176
Show Author Affiliations
Valentin Sarmiento, Pontificia Univ. Catolica del Peru (Peru)
N. Mauricio, Pontificia Univ. Catolica del Peru (Peru)
M. Zamalloa, Pontificia Univ. Catolica del Peru (Peru)
M. Asmad, Pontificia Univ. Catolica del Peru (Peru)
Guillermo Baldwin-Olguin, Pontificia Univ. Catolica del Peru (Peru)


Published in SPIE Proceedings Vol. 4419:
4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications

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