提出了一种提取两幅条纹图像间离面变形相位的新方法。由数字散斑相关方法(DSCM)测得两帧连续图像间的运动场，根据光流基本等式，运用初始图像的条纹频率与该运动场计算全场变形相位分布。介绍了基于DSCM变形相位方法的原理，对周边固定、中心加载圆盘的变形相位测量进行了实验和计算机模拟，验证了该方法的有效性。模拟结果和实验结果表明，该算法能够将直观的面内运动场和离面变形相位的提取联系起来，能够解调出物体全场离面变形相位信息。该方法优点是操作过程简单方便，既不需要将条纹图像转换到频域，也不需要相位解包络运算，且在条纹越密集处提取的变形相位信息更准确。该方法为计算物体全场变形相位分布和动态测量物体形变提供了新的途径。

A novel algorithm is proposed to extracts the out-of-plane component of deformation-phase from two continuous fringe patterns. The velocity field between two consecutive frames is estimated by digital speckle correlation method (DSCM). According to the optical flow constrained equation, the whole-field deformation-phase map is obtained by the estimations of the velocity field and the fringe frequency of the original image. The principle of measuring deformation-phase method is introduced based on DSCM. The experiment and computer simulation are done on the deformation-phase measurement of disk center loading and fixed around. The effectiveness of this method is verified. Simulation and experimental results show that the proposed method can connect the visible in-plane velocity field and the extraction of out-of-plane deformation-phase and demodulate the out-of-plane component of deformation-phase from the whole-field. The proposed method has advantages in the operation process as easy and convenient, and it neither need conversion of fringe image to frequency domain, also do not need phase envelope operation. The deformation-phase information extracted from denser fringe place is more accuracy. The proposed algorithm provides a new approach for whole-field deformation-phase measurement and dynamic object deformation measurement.