Optical digital spherometer based in structured light perfilometry

Valentin Sarmiento; N. Mauricio; M. Zamalloa; M. Asmad; Guillermo Baldwin-Olguin

doi:10.1117/12.437176

14 August 2001 Optical digital spherometer based in structured light perfilometry

Valentin Sarmiento, N. Mauricio, M. Zamalloa, M. Asmad, Guillermo Baldwin-Olguin

Proceedings Volume 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications; (2001) https://doi.org/10.1117/12.437176
Event: IV Iberoamerican Meeting of Optics and the VII Latin American Meeting of Optics, Lasers and Their Applications, 2001, Tandil, Argentina

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.

Citation Download Citation

Valentin Sarmiento, N. Mauricio, M. Zamalloa, M. Asmad, and Guillermo Baldwin-Olguin "Optical digital spherometer based in structured light perfilometry", Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); https://doi.org/10.1117/12.437176

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