激光与光电子学进展, 2020, 57 (21): 213301, 网络出版: 2020-10-26
基于我国人眼数据的人工晶体模型及其三维打印技术研究 下载: 1155次
Intraocular Lens Model and Its Three-Dimensional Printing Technology Based on Human Eye Data in China
视觉光学 人工晶体 三维打印技术 人眼模型 vision optics intraocular lens three-dimensional printing technology lens model
摘要
针对人眼个性化差异,建立符合我国人眼数据的晶体光学模型,并实现相应的数字化加工工艺,具有十分重要的价值与意义。三维打印技术可根据晶状体的三维数字模型进行加工制造,步骤简单,成本低廉。依据实测角膜参数、眼内间距、各介质折射率以及人眼像差,重构晶体光学模型,建立以聚甲基丙烯酸甲酯(PMMA)、聚乳酸(PLA)为材料,1 mm厚的渐变折射率晶体模型,和以光敏树脂为材料,1 mm厚的单一折射率晶体模型。利用光固化成型(SLA)工艺打印单一折射率晶体模型,熔融沉积成型(FDM)工艺打印渐变折射率晶体模型。结果表明:FDM工艺打印的渐变折射率晶体模型台阶效应严重;SLA工艺打印的单一折射率晶体模型,应力大小为87.9 nm/mm,焦距与理论值偏差4.98%,表面粗糙度达120 nm量级。
Abstract
Aiming at the individual differences of human eye, it is important to establish a lens optical model that is consistent to human eye data in China and implement the corresponding digital processing technology. According to the three-dimensional(3D) digital model of the lens, 3D printing technology can print the lens model with simple steps and low cost. Based on the measured corneal parameters, intraocular distances, refractive index of each medium, and eye aberration, the lens optical model is reconstructed. We establish a 1 mm-thick gradient refractive index lens model with polymethylmethacrylate (PMMA) and polylactic acid (PLA) as materials, and a 1 mm-thick single refractive index lens model with photosensitive resin as the material. The single refractive index lens model is printed by stereo lithography appearance (SLA) technology and the gradient refractive index lens model is printed by fused deposition molding (FDM) technology. The results show that the gradient refractive index lens model printed by FDM technology has serious step effects. The single refractive index lens model printed by SLA technology has a stress of 87.9 nm/mm. The difference between the focal length of the lens model and the theoretical value is 4.98% and the roughness of the surface is about 120 nm.
王丹琦, 袁群, 殷长俊, 高志山, 李新华. 基于我国人眼数据的人工晶体模型及其三维打印技术研究[J]. 激光与光电子学进展, 2020, 57(21): 213301. Wang Danqi, Yuan Qun, Yin Changjun, Gao Zhishan, Li Xinhua. Intraocular Lens Model and Its Three-Dimensional Printing Technology Based on Human Eye Data in China[J]. Laser & Optoelectronics Progress, 2020, 57(21): 213301.