Abstract In the present study, a brief, efficient and synchronous 3D (three-dimensional) deformation measurement method based on digital speckle pattern interferometry (DSPI) and digital shear speckle interference (DSSPI) was proposed. Comparing with traditional multi-laser and multi-CCD DSPI methods, this method used a single CCD and two lasers to capture the speckle patterns from three sensitive directions simultaneously, which simplified the optical arrangement, reduced the system cost, and improved the detection efficiency effectively. Based on the proposed method, the phase maps could be obtained by space carrier method, and the phase maps included both out-of-plane deformation and in-plane strain information (vertical in-plane, horizontal in-plane and out-of-plane). According to the deformation and strain information, the 3D deformation distribution could be obtained through an integral operation. In the present study, the measuring algorithm and optical arrangement were described in detail, and experiments were carried out to verify the validity.

中文翻译：

---

基于数字散斑干涉技术的三维变形同步测量

摘要 在本研究中，提出了一种基于数字散斑干涉测量（DSPI）和数字剪切散斑干涉（DSSPI）的简洁、高效、同步的3D（三维）形变测量方法。与传统的多激光器和多CCD DSPI方法相比，该方法使用单个CCD和两个激光器同时捕获三个敏感方向的散斑图案，简化了光学布置，降低了系统成本，有效提高了检测效率. 基于所提出的方法，可以通过空间载体方法获得相位图，相位图包括面外变形和面内应变信息（垂直面内、水平面内和面外）。飞机）。根据变形和应变信息，可以通过积分运算获得 3D 变形分布。在本研究中，详细描述了测量算法和光学布置，并进行了实验以验证其有效性。