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1.河北工业大学 机械工程学院, 天津 300401
2.西安交通大学 机械工程学院, 陕西 西安 710049
3.中国飞机强度研究所 强度与结构完整性全国重点实验室, 陕西 西安 710065
Received:08 May 2026,
Revised:2026-06-02,
Online First:14 August 2026,
Published:10 August 2026
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靳钰,倪育博,高楠等.双镜面物体面形三维测量的虚拟基准标定[J].光学精密工程,2026,34(15):2359-2368.
JIN Yu,NI Yubo,GAO Nan,et al.Virtual datum calibration for surface shape 3D measurement of double mirror objects[J].Optics and Precision Engineering,2026,34(15):2359-2368.
靳钰,倪育博,高楠等.双镜面物体面形三维测量的虚拟基准标定[J].光学精密工程,2026,34(15):2359-2368. DOI: 10.37188/OPE.20263415.2359. CSTR: 32169.14.OPE.20263415.2359.
JIN Yu,NI Yubo,GAO Nan,et al.Virtual datum calibration for surface shape 3D measurement of double mirror objects[J].Optics and Precision Engineering,2026,34(15):2359-2368. DOI: 10.37188/OPE.20263415.2359. CSTR: 32169.14.OPE.20263415.2359.
在先进装备制造和复杂光学仪器中存在一类双镜面物体,其两工作面法向夹角大,整体三维面形测量难度较高。采用相位偏折术分别测量两工作面时,由于所测数据位于不同坐标系,且缺少统一的实体基准,故难以确定对应两面数据之间的关系。该问题会直接影响两侧点云的坐标统一与后续拼接精度,使双镜面整体面形重建受到限制。为此,本文提出一种虚拟基准标定方法,以子系统标定过程中形成的虚拟参考面构建虚拟基准,并结合多姿态平面镜相位重建结果与转台坐标系约束,确定两虚拟参考面之间的空间变换关系,实现双镜面测量数据统一。实验结果表明,所提标定方法能够完成双镜面点云拼接,右表面相对于标准平面的均方根误差为0.059 mm,实现了双镜面物体的整体三维面形重建。
Double-mirror components are widely used in advanced manufacturing equipment and complex optical instruments. However, complete three-dimensional (3D) surface-form measurement is challenging because the two functional surfaces typically have a large angle between their surface normals. When phase-measuring deflectometry (PMD) is applied separately to the two surfaces, the reconstructed point clouds are expressed in independent coordinate systems. The lack of a common physical datum prevents determination of their relative spatial transformation and degrades point-cloud registration accuracy. A virtual-datum calibration method is proposed to establish a common coordinate system without requiring a physical reference shared by the two subsystems. The method uses virtual reference planes retained during subsystem calibration as datum-transfer carriers. Phase-reconstructed measurements of a plane mirror acquired at multiple poses are combined with turntable-coordinate-system constraints to determine the spatial transformation between the two virtual reference planes. The two surface datasets are thereby transformed into a unified coordinate system for 3D reconstruction. Experimental validation achieved point-cloud registration of the double-mirror surfaces. The right surface exhibited a root-mean-square (RMS) deviation of 0.059 mm relative to a reference plane, confirming the feasibility of complete 3D surface-form reconstruction. The method provides a practical calibration strategy for precision measurement of multi-surface reflective components.
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