提出了一种测量渐进多焦点镜片屈光度的方法，可用于精确测量大量程的单焦点镜片和渐进多焦点镜片的屈光度。基于泰伯干涉仪法研究镜片屈光度的测量原理，推导出最优屈光度测量公式，针对-8~8 D范围量程设计了泰伯干涉仪的主要参数，主要参数分别为光栅周期、光栅夹角、光栅间距。构建了移相式泰伯干涉仪测量系统，采用基于靶面坐标系和光栅坐标系的标定方法，并使用五步移相算法对莫尔条纹进行求解。对多种屈光度和渐进多焦点镜片进行多次实验测量，数据结果表明其测量误差优于0.1%。

In this paper, we present a method for accurately measuring the diopter of both progressive multi-focus and large-range single focal lens. Based on Talbot interferometer methods, we investigated the principle of lens diopter measurement and deduced the formula of optimal diopter measurement. The main parameters of the Talbot interferometer were designed for the range of -8 D to 8 D, and include the grating period, grating angle, and grating spacing. Furthermore, a phase-shifting Talbot interferometer measuring system was constructed and we adopted the calibration method, which uses the target coordinate and grating coordinate systems. Here we applied a five-step phase-shifting algorithm to solve the moiré fringe. The multiple experimental results of multiple diopters and progressive multi-focus lens show that the measurement error is better than 0.1%.