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Title:	Reducing speckle in double-pass systems using focus tunable lenses
Author:	García Guerra, Carlos Enrique; Aldaba Arévalo, Mikel; Arjona Carbonell, Mª Montserrat; Pujol Ramo, Jaume
Other authors:	Universitat Politècnica de Catalunya. Departament d'Òptica i Optometria; Universitat Politècnica de Catalunya. GREO - Grup de Recerca en Enginyeria Òptica
Abstract:	Speckle arises in double-pass systems when coherent light is reflected by the retina. Since it degrades the images that are used to characterize the eye, there is special attention in reducing speckle when working with instruments based on retinal reflection. We present in this work the results of reducing speckle in a double-pass system by varying the vergence of the beam entering the eye with an electro-optical liquid lens during the recording of images. An artificial and a real eye were measured, observing a speckle reduction when the method was applied.
Subject(s):	-Àrees temàtiques de la UPC::Ciències de la visió -Speckle -Quality control--Optical methods -Lenses -Retina -Eye--Accommodation and refraction -speckle -double-pass -optical quality -tunable lens -Retina -Lents -Ulls -- Acomodació i refracció -Òptica -- Mesuraments
Rights:	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Conference Object
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