| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 10, 2015
|
|
|---|---|---|
| Article Number | 15001 | |
| Number of page(s) | 6 | |
| DOI | https://doi.org/10.2971/jeos.2015.15001 | |
| Published online | 29 January 2015 | |
Regular paper
Speckle reduction in double-pass retinal images using variable-focus lenses
Centre of Sensors, Instruments and Systems Development (CD6). Polytechnic University of Catalonia (UPC). Rambla Sant Nebridi 10, 08222, Terrassa, Barcelona, Spain
* carlos.enrique.garcia@cd6.upc.edu
Received:
10
October
2014
Revised:
4
January
2015
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.
Key words: Speckle / visual optics / metrology
© The Author(s) 2015. All rights reserved.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.