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Proceedings Paper

New interferometric method to assess intraocular lens (IOL) characteristics
Author(s): Gilles Bos; Jean-Marc Vanzo; Jean Maufoy; J. L. Gutzwiller
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Paper Abstract

To assess the images formed by a lens, we have to know first its focal length and its transfer function, characteristic of the quality of the theoretical focused image. At this time, aberrant lenses cannot be perfectly characterized. Several optical benches have been built in order to measure focal length and MTF of these lenses, but repeatability was very poor. Corneal and Supelec then conceived of a new method based mainly on calculations instead of mechanical device adjustments. A preliminary study proved the feasibility of a new method, which we call the 'speckle' method. Several tests have shown that power and imaging quality were included into the two-dimensional signal measured by a CCD. Mathematical theory was then conceived to assess power and imaging quality with good repeatability. We will present here the theoretical basis of the speckle method, then present the practical bench. Results will be given after a second applied research program, which will be completed by the end of 1994.

Paper Details

Date Published: 26 May 1994
PDF: 5 pages
Proc. SPIE 2127, Ophthalmic Lens Design and Fabrication II, (26 May 1994); doi: 10.1117/12.176835
Show Author Affiliations
Gilles Bos, Corneal SA (France)
Jean-Marc Vanzo, Ecole Superieure d'Electricite (France)
Jean Maufoy, Ecole Superieure d'Electricite (France)
J. L. Gutzwiller, Ecole Superieure d'Electricite (France)

Published in SPIE Proceedings Vol. 2127:
Ophthalmic Lens Design and Fabrication II
Donn Michael Silberman, Editor(s)

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