
Proceedings Paper
Characterization of a conical null-screen corneal topographerFormat | Member Price | Non-Member Price |
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Paper Abstract
In this work, we perform the characterization of a conical null-screen corneal topographer. For this, we design a custom
null-screens for testing a reference spherical surfaces with a radius of curvature of 7.8 mm. We also test a 1/2-inch (12.7
mm) diameter stainless steel sphere and an aspherical surface with a radius of curvature of 7.77 mm. We designed some
different target distributions with the same target size to evaluate the shape of the reference surfaces. The shape of each
surface was recovered by fitting the experimental data to a custom shape using the least square methods with an iterative
algorithm. The target distributions were modified to improve the accuracy of the measurements. We selected a
distribution and evaluate the accuracy of the algorithms to measure spherical surfaces with a radius of curvature from 6
mm to 8.2 mm by simulating the reflected pattern. We also simulate the reflected patter by changing the position of the
surface along the optical axis and then we measure the resulting radius of curvature.
Paper Details
Date Published: 26 June 2017
PDF: 11 pages
Proc. SPIE 10330, Modeling Aspects in Optical Metrology VI, 103301E (26 June 2017); doi: 10.1117/12.2270055
Published in SPIE Proceedings Vol. 10330:
Modeling Aspects in Optical Metrology VI
Bernd Bodermann; Karsten Frenner; Richard M. Silver, Editor(s)
PDF: 11 pages
Proc. SPIE 10330, Modeling Aspects in Optical Metrology VI, 103301E (26 June 2017); doi: 10.1117/12.2270055
Show Author Affiliations
Arturo I. Osorio-Infante, Univ. Nacional Autónoma de México (Mexico)
Manuel Campos-García, Univ. Nacional Autónoma de México (Mexico)
Manuel Campos-García, Univ. Nacional Autónoma de México (Mexico)
Cesar Cossio-Guerrero, Univ. Nacional Autónoma de México (Mexico)
Published in SPIE Proceedings Vol. 10330:
Modeling Aspects in Optical Metrology VI
Bernd Bodermann; Karsten Frenner; Richard M. Silver, Editor(s)
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