针对传统数字散斑干涉难以实现简便快速的动态测量的问题, 本文提出一种基于偏转角的空间载波相位检测技术。该方法根据散斑干涉测量中反射镜的偏转实现空间载波, 物光与偏转参考光干涉形成干涉光场, 记录了载波信息。干涉光照射到CCD 靶面, 采用CCD 阵列上相邻三个像素计算得到光干涉场的相位信息, 从而通过单幅散斑干涉图像解算光干涉场的相位信息。实验结果表明, 与传统的相位检测技术相比节省了测量和计算时间, 简化了测量系统结构, 算法相对简单, 达到快速相位检测的目的。

A spatial carrier phase detection technology based on deflection angle will be introduced in order to achieve dynamic phase simply and quickly in the measurement of digital speckle interference. Firstly, deflecting mirror was used to realize space carrier. Interference optical field was formed between object and deflection reference beams, as well as the information of carrier recorded. Then, three adjacent pixels on the CCD array were calculated to obtain interference phase information of the optical field. Finally, fast phase detection was implemented through a single speckle interference image. The method saves calculation times, simplifies the structure of the measuring system as well as algorithms, besides, and achieves the goal of fast phase detection compared with traditional phase detection technology.