Accuracy of the reconstruction of the crystalline lens gradient index with optimization methods from Ray Tracing and Optical Coherence Tomography data

作     者：de Castro, Alberto Barbero, Sergio Ortiz, Sergio Marcos, Susana 

作者机构：CSIC Inst Opt Daza de Valdes Madrid 28006 Spain 

出 版 物：《OPTICS EXPRESS》 (Opt. Express)

年 卷 期：2011年第19卷第20期

页      面：19265-19279页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Ministerio de Ciencia e Innovacion [FIS2008-02065, EURYI-05-102-ES (EUROHORCs-ESF)] Ramon y Cajal program CSIC 

主　　题：Crystalline lens Fiber optic sensors Image processing algorithms Magnetic resonance imaging Ray tracing Refractive index 

摘      要：The accuracy of the reconstruction of the Gradient Refractive Index (GRIN) of the crystalline lens from optimization methods was evaluated. Different input data, including direction cosines of deflected rays, ray impacts obtained from ray tracing and optical path differences from Optical Coherence Tomography (OCT) were studied. Three different GRIN models were analyzed. The experimental errors of the different experimental input data were estimated from comparisons of measurements and simulations using artificial lenses of known geometries. The experimental errors in the surfaces shape measurement and the influence of the number of rays were also considered. OCT-based input data produced the most accurate GRIN reconstructions. We found that optimization methods (combining global and local search algorithms) allow GRIN reconstructions with acceptable accuracies for moderate noise level. (C) 2011 Optical Society of America