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19 November 2021 Extension of measurement area of stereo deflectometry
Yurong Ren, Xiangchao Zhang, Wei Wang, Shaoliang Li, Xinyue Liu, Haoran Meng
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Proceedings Volume 12059, Tenth International Symposium on Precision Mechanical Measurements; 120590M (2021) https://doi.org/10.1117/12.2611735
Event: Tenth International Symposium on Precision Mechanical Measurements, 2021, Qingdao, China
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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Yurong Ren, Xiangchao Zhang, Wei Wang, Shaoliang Li, Xinyue Liu, and Haoran Meng "Extension of measurement area of stereo deflectometry", Proc. SPIE 12059, Tenth International Symposium on Precision Mechanical Measurements, 120590M (19 November 2021); https://doi.org/10.1117/12.2611735
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KEYWORDS
Deflectometry
Calibration
Optical testing
Optics manufacturing
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