1. Spanish National Research Council

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    1. Mentioned In 39 Articles

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

      Accuracy of the reconstruction of the crystalline lens gradient index with optimization methods from Ray Tracing and Optical Coherence Tomography data
      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 ...
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    3. Postdoctoral Position in Ocular imaging and Visual Optics, Institute of Optics, CSIC, Madrid

      Postdoctoral Position in Ocular imaging and Visual Optics, Institute of Optics, CSIC, Madrid
      Two 3-year postdoctoral positions are available at the Institute of Optics (CSIC), Madrid, Spain through the JAE-CSIC Postdoctoral Program (JAE-DOC). Application Deadline: February 8, 2011   Estimated starting date:  July-September 2011   The Visual Optics and Biophotonics Lab (http://www.vision.csic.es) at the Institute of Optics seeks candidates with a Ph.D. in Visual Science or Applied Optics, willing to work on Ocular Imaging and Visual Optics. Candidates with strong ...
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    4. Distortions of the posterior surface in optical coherence tomography images of the isolated crystalline lens: effect of the lens index gradient

      Distortions of the posterior surface in optical coherence tomography images of the isolated crystalline lens: effect of the lens index gradient
      We quantify the posterior surface distortions in optical coherence tomography (OCT) images of isolated crystalline lenses. The posterior radius of curvature and asphericity obtained from OCT images acquired with the beam incident first on the anterior, and then the posterior, surface were compared. The results were compared with predictions of a ray-tracing model which includes the index gradient. The results show that the error in the radius of curvature is ...
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    5. Three-dimensional reconstruction of the crystalline lens gradient index distribution from OCT imaging

      Three-dimensional reconstruction of the crystalline lens gradient index distribution from OCT imaging
      We present an optimization method to retrieve the gradient index (GRIN) distribution of the in-vitro crystalline lens from optical path difference data extracted from OCT images. Three-dimensional OCT images of the crystalline lens are obtained in two orientations (with the anterior surface up and posterior surface up), allowing to obtain the lens geometry. The GRIN reconstruction method is based on a genetic algorithm that searches for the parameters of a ...
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    6. Optical distortion correction in Optical Coherence Tomography for quantitative ocular anterior segment by three-dimensional imaging

      Optical distortion correction in Optical Coherence Tomography for quantitative ocular anterior segment by three-dimensional imaging
      A method for three-dimensional 3-D optical distortion (refraction) correction on anterior segment Optical Coherence Tomography (OCT) images has been developed. The method consists of 3-D ray tracing through the different surfaces, following denoising, segmentation of the surfaces, Delaunay representation of the surfaces, and application of fan distortion correction. The correction has been applied theoretically to realistic computer eye models, and experimentally to OCT images of: an artificial eye with a ...
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    7. Optical coherence tomography for quantitative surface topography

      Optical coherence tomography for quantitative surface topography
      We address the measurement and correction of fan distortion in optical coherence tomography (OCT). This effect arises from the scanning system configuration and prevents one, in general, from obtaining quantitative topographic data from OCT. Computer simulations allowed us to quantify the effect and evaluate its dependence on the scanning mirror separation and design of the collimating lens, as well as to estimate the optimal axial position of that lens to ...
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    8. Anterior segment imaging with Spectral OCT system using a high-speed CMOS camera

      Anterior segment imaging with Spectral OCT system using a high-speed CMOS camera
      We describe a new ultrahigh speed Spectral OCT instrument making use of a CMOS camera and demonstrate high quality in vivo imaging of the anterior segment of the human eye. The high flexibility of the designed imaging system allows a wide range of imaging protocols. Two- and three-dimensional high ... [Opt. Express 17, 4842-4858 (2009)]
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    9. Postdoctoral Position in Visual Optics and Biophotonics - Spain

      We seek candidates to apply for one 3-year postdoctoral JUAN DE LA CIERVA position (Spanish Ministry of Science and Innovation) at the Visual Optics and Biophotonics Lab. The Visual Optics and Biophotonics Lab (http://www.vision.csic.es) at the Institute of Optics seeks candidates with a Ph.D. in Visual Science or Applied Optics, willing to work on Ocular Imaging and Visual Optics. Candidates with strong motivation on experimental ...
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    10. Postdoctoral Position at Institute of Optics, Madrid, Spain

      The Visual Optics and Biophotonics Lab (http://www.vision.csic.es) at the Institute of Optics seeks candidates with a Ph.D. in Visual Science or Applied Optics, willing to work on Ocular Imaging and Visual Optics. Candidates with strong motivation on experimental research, and ophthalmic and ocular biology applications are encouraged to apply. The selection committee will value scientific merits of the candidate as well as the opportunity of ...
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    11. 31-39 of 39 « 1 2 3
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  2. About Spanish National Research Council

    Spanish National Research Council

    Spanish National Research Council (Consejo Superior de Investigaciones Cientificas - CSIC) is the largest public institution dedicated to research in Spain and the third largest in Europe. Belonging to the Spanish Ministry of Science and Innovation through the Secretary of State for Research, its main objective is to develop and promote research that will help bring about scientific and technological progress, and it is prepared to collaborate with Spanish and foreign entities in order to achieve this aim. Also see Visual Optics and Biophotonics Lab at CSIC.