Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate
2006-03-07
2006-03-07
Schwartz, Jordan N. (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
C351S164000, C351S169000
Reexamination Certificate
active
07008058
ABSTRACT:
A progressive spectacle lens having two aspherical and in particular progressive surfaces, i.e. surfaces contributing to the rise in the effect (addition Add.) from the distance vision portion to the near vision portion, in which the sagittal heightsin-line-formulae description="In-line Formulae" end="lead"?zi=zi(x,y)in-line-formulae description="In-line Formulae" end="tail"?of at least one (i) progressive surface (i=1,2) are chosen such that the sagittal height z of this respective surface at the edge of the spectacle lens given byin-line-formulae description="In-line Formulae" end="lead"?yi=fi1(x) fory≧0 andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?yi=fi2(x) fory<0in-line-formulae description="In-line Formulae" end="tail"?assume predefined values without this surface (i) or the other surface (j) having a reversal of curvature forming a supporting edge.
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Altheimer Helmut
Esser Gregor
Haimerl Walter
Pfeiffer Herbert
Crowell & Moring LLP
Rodenstock GmbH
Schwartz Jordan N.
Stultz Jessica
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