18 January 2019 Experiment on phase correction of reflection fringe based on camera calibration
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Proceedings Volume 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment; 108390A (2019) https://doi.org/10.1117/12.2504865
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China
Abstract
In order to improve the accuracy of phase extraction in 3D surface profile measurement of fringe reflection, combined with the phase-shifting technology and the calibration method of plane calibration target, the phase extraction and calibration experiments are carried out based on the establishment of a complete detection system and a non-linear camera model. For a plane mirror with a diameter of 100mm and a thickness of 25mm, first, according to the calibration method of the plane calibration target, the intrinsic and extrinsic parameters of camera are obtained; then, the images of the distortion stripes are obtained by the fringe reflection system, and they are corrected based on the camera calibration results; finally, the phase distribution before and after image correction is calculated by digital phase-shifting and phase unwrapping technique respectively. Experimental results show that the maximum phase extraction error is 0.1026 rad when only considering the second-order radial distortion coefficient: k1=-0.06068, k2=-0.09116.
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Lu Han, Ailing Tian, Bingcai Liu, Xueliang Zhu, and Hongjun Wang "Experiment on phase correction of reflection fringe based on camera calibration ", Proc. SPIE 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 108390A (18 January 2019); doi: 10.1117/12.2504865; https://doi.org/10.1117/12.2504865
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