光学学报, 2019, 39 (4): 0412012, 网络出版: 2019-05-10   

基于满周期等相移算法的改进双频在线相位测量轮廓术 下载: 851次

Improved Dual-Frequency On-Line Phase Measuring Profilometry Based on Full-Cycle Equal Phase-Shift Algorithm
作者单位
1 湖北大学物理与电子科学学院铁电压电材料与器件湖北省重点实验室, 湖北 武汉 430062
2 四川大学光电科学技术系, 四川 成都 610064
3 太原科技大学电子信息工程学院, 山西 太原 030024
摘要
基于在线三维(3D)测量中被测物体与高频条纹的相对位置关系,提出了一种改进的双频在线3D测量方法,通过控制被测物体运动时的采集点,使各帧像素匹配后变形条纹图中的高频条纹光强分布完全一致。直接利用满周期等相移算法进行相位计算,从而避开滤波过程,提升3D重构精度。高频条纹光强分量被设计为远小于低频条纹光强分量,可将其看成是微弱的背景光,进一步减小高频条纹对相位计算的干扰。仿真与实验结果表明:相比其他方法,所提方法可有效提升重构精度。
Abstract
Based on the relative position relationship between the measured object and the high-frequency fringe in the on-line three-dimensional (3D) measurement, an improved dual-frequency on-line 3D measurement method is proposed. By controlling the acquisition points when the measured object moves, the light intensity distribution of the high-frequency fringe in each deformed pattern after pixel matching can be exactly consistent. The full-cycle equal phase-shift algorithm is directly applied for phase calculation so that the filtering process is avoided and the 3D reconstruction accuracy is improved. The light intensity component of the high-frequency fringe is designed to be much smaller than that of the low-frequency fringe, and it can be considered as faint background light and the interference of high-frequency fringe on phase calculation is further reduced. The simulated and experimental results show that compared with other methods, the proposed method can improve the reconstruction accuracy effectively.

彭旷, 曹益平, 武迎春. 基于满周期等相移算法的改进双频在线相位测量轮廓术[J]. 光学学报, 2019, 39(4): 0412012. Kuang Peng, Yiping Cao, Yingchun Wu. Improved Dual-Frequency On-Line Phase Measuring Profilometry Based on Full-Cycle Equal Phase-Shift Algorithm[J]. Acta Optica Sinica, 2019, 39(4): 0412012.

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