双压电片变形镜的人眼像差拟合能力分析

Analysis on fitting capability to human aberrations of bimorph deformable mirrors

针对三种不同空间分辨率的双压电片变形镜(BimorphDM),采用仿真实验分析其对3～35项Zernike静态像差和实际人眼(包括疾病人眼)像差的拟合能力。实验表明,Bimorph变形镜特别适用于校正低阶像差,拟合误差小于0.15,随着空间分辨率的增加,Bimorph变形镜对Zernike像差和人眼像差的拟合能力总体表现为增强的趋势,其中,35单元的Bimorph变形镜的像差拟合能力最优,对前20项Zernike像差的拟合误差稍优于传统分立式压电变形镜。通过对Bimorph变形镜像差拟合能力的实验分析,为人眼视网膜高分辨率系统的Bimorph变形镜选型提供了分析方法,也为进一步提升Bimorph变形镜的像差校正能力奠定了研究基础。

This study adapted simulations to analyze the fitting capabilities to human aberration of three kinds of Bimorph Deformable Mirrors （DMs） with different spatial resolutions, especially the capability to fit to 3- 35th orders of Zernike static aberrations and the human aberrations, including the eye of diseases. It’s shown that Bimorph DM is well suitable for fitting to low-order aberrations with the error less than 0.15. As the spatial resolution increased, the capability of fitting aberrations enhanced totally. Compared with traditional discrete piezoelectric DM, 35-element Bimorph DM had smaller fitting error on the first 20th Zernike aberration. This simulated analysis provided an analytical method for the selection of Bimorph DMs for high-resolution human eye imaging systems. In addition, it provided a research foundation of further improvement of the Bimorph DM in fitting aberrations capability.