摘要
衍射光学设计已经成为人工晶状体设计领域的新兴技术。本文首先分析了衍射多焦点人工晶状体的具体设计流程,提出了联合非球面衍射基底矫正像质的衍射多焦点人工晶状体设计;其次针对多焦点衍射光学元件相位结构提出并分析了基底参数对衍射效率的影响的数学模型;最后通过实例对人工晶状体设计中非球面衍射基底的影响作出了优化。结果表明,设计流程可用于设计高成像质量多焦点人工晶状体,基底影响模型可用于分析并优化衍射基底参数对衍射效率的影响。
Objective Given the lack of research on the complete design and optimization of multifocal intraocular lenses(IOLs),we propose the design process of diffractive multifocal IOLs focusing on the intermediate distance,and then analyze and optimize the effect of substrate parameters on diffraction efficiency.Multifocal IOLs are mostly based on the superposition of different diffractive optical elements(DOEs)design from inside to outside.When human eyes are in a bright environment,the pupil is relatively small and the edge diffraction periods may not be involved in imaging.Meanwhile,the imaging changes in the transition region and the light interference in adjacent focal points lead to deteriorated visual quality.Thus the multifocal design method with pupil size independent into the IOL optical design becomes a research hotspot,on which many scholars have conducted research.Additionally,as the common view distance of human eyes is intermediate in daily life,optimization of the intermediate distance in multifocal IOL design has also become the focus.On the other hand,DOEs in IOL systems are usually designed with large curvature substrates to carry more diopters due to design space limitations.Combined with the softer material,the diffractive structure is mostly tilted and inclined to be perpendicular to the large curvature substrates,and then the effect of the substrates cannot be ignored.With the continuously improving requirements for visual quality,the future design of IOL substrates will certainly be more inclined to aspheric substrate as a method to improve image quality.In this way,the analysis and optimization of the effect of aspheric substrate parameters on the diffraction performance can bridge the gap between theory and practice in ophthalmic lens design.Through theoretical modeling and simulation analysis,we put forward the analysis and solutions in the above two aspects and hope that our study could serve as a model for the design of diffractive ophthalmic lenses such as multifocal IOLs.Methods On one hand
作者
董博
杨迎
薛常喜
Dong Bo;Yang Ying;Xue Changxi(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,Jilin,China;Key Laboratory of Advanced Optical System Design and Manufacturing Technology of Universities of Jilin Province,Changchun University of Science and Technology,Changchun 130022,Jilin,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2023年第19期42-50,共9页
Acta Optica Sinica
基金
吉林省自然科学基金(20220101124JC)。
关键词
衍射光学
人工晶状体
多焦点
衍射效率
diffraction optics
intraocular lens
multi focus
diffraction efficiency
