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Reducing speckle in double-pass systems using focus tunable lenses
García Guerra, Carlos Enrique; Aldaba Arévalo, Mikel; Arjona Carbonell, Mª Montserrat; Pujol Ramo, Jaume
Universitat Politècnica de Catalunya. Departament d'Òptica i Optometria; Universitat Politècnica de Catalunya. GREO - Grup de Recerca en Enginyeria Òptica
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.
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
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
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