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Proceedings Paper

Cylinder stitching interferometry: with and without overlap regions
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Paper Abstract

Since the cylinder surface is closed and periodic in the azimuthal direction, existing stitching methods cannot be used to yield the 360° form map. To address this problem, this paper presents two methods for stitching interferometry of cylinder: one requires overlap regions, and the other does not need the overlap regions. For the former, we use the first order approximation of cylindrical coordinate transformation to build the stitching model. With it, the relative parameters between the adjacent sub-apertures can be calculated by the stitching model. For the latter, a set of orthogonal polynomials, termed Legendre Fourier (LF) polynomials, was developed. With these polynomials, individual sub-aperture data can be expanded as composition of inherent form of partial cylinder surface and additional misalignment parameters. Then the 360° form map can be acquired by simultaneously fitting all sub-aperture data with LF polynomials. Finally the two proposed methods are compared under various conditions. The merits and drawbacks of each stitching method are consequently revealed to provide suggestion in acquisition of 360° form map for a precision cylinder.

Paper Details

Date Published: 13 June 2017
PDF: 7 pages
Proc. SPIE 10449, Fifth International Conference on Optical and Photonics Engineering, 1044932 (13 June 2017); doi: 10.1117/12.2270910
Show Author Affiliations
Junzheng Peng, Jinan Univ. (China)
Dingfu Chen, Shanghai Univ. (China)
Yingjie Yu, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 10449:
Fifth International Conference on Optical and Photonics Engineering
Anand Krishna Asundi, Editor(s)

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