Mr. Weiwei Li Profile

Weiwei Li

at Inner Mongolia University of Science & Technology

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Proceedings Article | 19 October 2016 Paper

Full-field optical coherence tomography apply in sphere measurements

Wei Shi, Weiwei Li, Juncheng li, Jingyu Wang, Jianguo Wang

Proceedings Volume 10154, 101540Y (2016) https://doi.org/10.1117/12.2246616

KEYWORDS: Optical coherence tomography, Optical spheres, Tomography

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The geometry of a spherical surface, for example that of a precision optic, is completely determined by the radius –of-curvature at one point and the deviation from the perfect spherical form at all other points of the sphere. Full-field Optical Coherence Tomography (FF-OCT) is a parallel detection OCT technique that utilizes a 2D detector array. This technique avoids mechanical scanning in imaging optics, thereby speeding up the imaging process and enhancing the quality of images. The current paper presents an FF-OCT instrument that is designed to be used in sphere measurement with the principle of multiple delays (MD) OCT to evaluate the curvature and radius of curved objects in single-shot imaging. The optimum combination of the MD principle with the FF-OCT method was evaluated, and the radius of a metal ball was measured with this method. The generated 2n-1 contour lines were obtained by using an MDE with n delays in a single en-face OCT image. This method of measurement, it engaged in the measurement accuracy of spherical and enriches the means of measurement, to make a spherical scan techniques flexible application.

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