Speckle reduction in double-pass retinal images using variable-focus lenses
Speckle arises in double-pass images when coherent light is scattered by the retina. Since this noise degrades the images that are used to characterize the eye, there is special attention in reducing speckle when working with instruments based on retina reflections. In this work, we present a method...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/26796 |
| Acceso en línea: | https://hdl.handle.net/2117/26796 https://dx.doi.org/10.2971/jeos.2015.15001 |
| Access Level: | acceso abierto |
| Palabra clave: | Speckle Physical optics Metrology Retina visual optics metrology WAVE-FRONT SENSOR HUMAN EYE QUALITY ABERRATION Òptica física Metrologia Àrees temàtiques de la UPC::Ciències de la visió Àrees temàtiques de la UPC::Enginyeria mecànica::Metrologia |
| Sumario: | Speckle arises in double-pass images when coherent light is scattered by the retina. Since this noise degrades the images that are used to characterize the eye, there is special attention in reducing speckle when working with instruments based on retina reflections. In this work, we present a method for speckle reduction in double-pass retinal images by producing minor periodic variations in the vergence of the beam entering the eye with a variable-focus lens during image recording. Measurements in an artificial and a real eye following the implementation of the method corroborate the speckle reduction. |
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