Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate
2005-12-13
2005-12-13
Schwartz, Jordan M. (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
C351S159000
Reexamination Certificate
active
06974214
ABSTRACT:
A method for optimizing an atoroidal surface of an optical lens, in particular a spectacle lens, having at least one plane of symmetry is characterized by a combination of the following features: dividing the atoroidal surface having at least one plane of symmetry into at least two regions separated by the at least one plane of symmetry; representing one of the separate regions (represented region) of this surface by a set of coefficients of B spline functions; computing sagittal heights of the represented region by B spline interpolation; computing sagittal heights in at least one other region by mirroring coefficients or coordinates at the at least one plane of symmetry; and optimizing the atoroidal surface only by varying the set of B spline coefficients of the represented region.
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patent: 6752497 (2004-06-01), Esser et al.
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patent: 0886166 (1998-12-01), None
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C. Fuerter, “Optik-Konstruktion mit Splines” Optik, vol. 70, No. 1, 1985, pp. 19-28.
Altheimer Helmut
Baumbach Peter
Dorsch Rainer
Esser Gregor
Haimerl Walter
Crowell & Moring LLP
Rodenstock GmbH
Schwartz Jordan M.
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