Document Detail


Tomographic method for measurement of the gradient refractive index of the crystalline lens. I. The spherical fish lens.
MedLine Citation:
PMID:  15770979     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We present an iterative tomographic algorithm to reconstruct refractive-index profiles for meridional planes of the lens of the spherical fish eye from measurements of deflection angles of refracted rays. Numerical simulations show that the algorithm allows accuracy up to the fourth decimal place, provided that the refractive index can be regarded as an analytical function of the radial coordinate and the experimental errors are neglected. An experimental demonstration is given by applying the algorithm to retrieve the refractive-index profile of a spherical fish lens. The method is conceptually simple and does not require matching of the index of the surrounding medium to that of the surface of the lens, and the related iterative algorithm rapidly converges.
Authors:
Eva Acosta; Daniel Vazquez; Leon Garner; George Smith
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  22     ISSN:  1084-7529     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-03-17     Completed Date:  2005-05-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9800943     Medline TA:  J Opt Soc Am A Opt Image Sci Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  424-33     Citation Subset:  IM    
Affiliation:
Area de Optica, Departamento de Fisica Aplicada, Campus Sur, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain. fagoeva@usc.es
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MeSH Terms
Descriptor/Qualifier:
Animals
Corneal Topography / methods*
Fishes
Image Interpretation, Computer-Assisted / methods*
Lens, Crystalline / anatomy & histology,  physiology*
Refraction, Ocular / physiology*
Refractometry / methods*
Retinoscopy / methods*
Tomography, Optical / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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