透射显示双屏偏折系统中透明屏折射误差补偿方法  

Compensation Method of Refraction Error Caused by Transparent Display Screen in Transmissive Display Dual-Screen Deflectometric System

作　　者：王月霞 张宗华[1] 高楠[1] 孟召宗 Wang Yuexia;Zhang Zonghua;Gao Nan;Meng Zhaozong(School of Mechanical Engineeriyig,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学机械工程学院,天津300130

出　　处：《光学学报》2022年第5期78-85,共8页Acta Optica Sinica

基　　金：国家自然科学基金(52075147,51675160)。

摘　　要：透射显示双屏偏折系统解决了传统方法无法测量非连续镜面三维形貌的难题,其使用透明显示屏,既增大了测量视场又减小了系统结构的复杂性。但透明显示屏的折射效应会导致三维测量结果产生误差。在分析透射显示双屏系统中折射光路的基础上,提出一种透明显示屏折射误差补偿方法。首先分析透射显示双屏系统测量原理及折射误差产生原因。在参数标定过程中,从相位角度对透明显示屏引入的折射误差进行补偿。在所研制的测量系统上验证所提出的折射误差补偿方法。实验结果表明,该方法消除了折射效应带来的误差,提高了镜面物体三维形貌测量的精度。The proposed transmissive display dual-screen deflectometric system solves the challenging problem that traditional methods fail to obtain the three-dimensional(3 D) shape of a mirror object with a discontinuous surface. The usage of a transparent display screen not only widens the measurement field of view but also reduces the complexity of the system structure. However, the refraction effect of the transparent display screen will cause errors in the 3 D measured data. After analyzing the refraction light path in the transmissive display dual-screen system, this paper proposes a method of compensating the refraction error caused by the transparent display screen. To start with, we analyze the measurement principle of the transmissive display dual-screen system and the cause of the refraction error. Then, the refraction error introduced by the transparent display screen is compensated through phase in the parameter calibration process. Finally, the proposed method of refraction error compensation is verified on the developed measurement system. The experimental results show that the proposed method eliminates the error caused by the refraction effect and improves the measurement accuracy of 3 D mirror object shape.

关 键 词：测量 光学三维测量系统 相位测量偏折术 透明显示屏 折射效应 相位计算 

分 类 号：TH741[机械工程—光学工程]