Ms. Yurong Ren Profile

Yurong Ren

at Fudan Univ.

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Proceedings Article | 19 November 2021 Paper

Extension of measurement area of stereo deflectometry

Yurong Ren, Xiangchao Zhang, Wei Wang, Shaoliang Li, Xinyue Liu, Haoran Meng

Proceedings Volume 12059, 120590M (2021) https://doi.org/10.1117/12.2611735

KEYWORDS: Deflectometry, Calibration, Optics manufacturing, Optical testing

Read Abstract +

Stereo deflectometry can specify the position of a workpiece and reduce the difficulty of geometrical calibration. But the measurement scope is limited, and this issue is especially severe for the measurement of complex surfaces. A method is proposed to extend the measuring scope of stereo deflectometry. The nominal model of the surface under test is aligned with the overlapped measurement area of the stereo vision system, and the other areas outside overlapped region are measured using the monoscopic SCOTS approach with each camera, respectively. This method effectively combines the advantages of stereo and monoscopic deflectometry, and the measuring accuracy and flexibility can be improved.

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