Zhang Shuai, Hou Xi, Yan Wei, Hu Xiaochuan, Zhao Yuancheng, Li Mengfan
Opt Lett. 2024 Jul 15;49(14):3962-3965. doi: 10.1364/OL.526027.
In interferometry with a computer-generated hologram (CGH), the substrate error of the CGH limits its high-precision aspheric measurement application. The propagation form of the substrate error is still ambiguous although 0th-order calibration can partly correct it. We established the ray propagation in a three-dimensional model in order to solve the ambiguity of substrate error propagation. This method shows the modulation process of the CGH substrate error on the transmitted wavefront for the first time, until now, to the best of our knowledge. The experiments show that the propagation of the substrate error can be accurately analyzed, and the CGH design efficiency also is significantly improved after applying this method.
在利用计算机生成全息图（CGH）的干涉测量中，CGH的基底误差限制了其在高精度非球面测量中的应用。尽管零阶校准可以部分校正基底误差，但其传播形式仍不明确。为了解决基底误差传播的不确定性，我们建立了三维模型中的光线传播。据我们所知，该方法首次展示了CGH基底误差在透射波前上的调制过程。实验表明，该方法能够准确分析基底误差的传播情况，应用该方法后，CGH的设计效率也显著提高。
