A Hartmann wavefront sensor is a type of wavefront detection instrument that has been widely used in various fields. Traditional Hartmann wavefront sensors usually comprise a monofocal refraction lenslet array to segment the wavefront at the entrance pupil. Each wavelet is focused at the focal plane along the projection of the lenslet, forming the foci array. Unlike the multifocal self-interference Taiji-lenslet array, a type of multifocal diffraction Taiji-lenslet array was proposed in this study to improve the measurement accuracy using the weighted centroid location algorithm of these multifocal spots, where the latter is more easily designed than the former. An optical experiment was implemented using the multifocal diffraction Taiji-lenslet array to verify its effectiveness. As a type of diffractive lens, a large-aperture Taiji-lenslet array can be easily fabricated via lithography, which has great potential for application in the measurement of large-scale laser beams and optical elements.

哈特曼波前传感器是一种广泛应用于各个领域的波前检测仪器。传统的哈特曼波前传感器通常包括一个单焦折射小透镜阵列，以在入瞳处分割波前。每个小波沿着小透镜的投影聚焦在焦平面上，形成焦点阵列。与多焦点自干涉太极小透镜阵列不同，本研究提出了一种多焦点衍射太极小透镜阵列，以利用这些多焦点光斑的加权质心定位算法来提高测量精度，后者比传统方法更容易设计。以前的。使用多焦点衍射太极小透镜阵列进行了光学实验以验证其有效性。作为衍射透镜的一种，