Lens blanks, process of manufacture therefor and eyewear incorporating lenses made therefrom
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United States of America Patent
Stats
-
Sep 8, 1998
Grant Date -
N/A
app pub date -
Oct 15, 1996
filing date -
Oct 20, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention concerns an optically non correcting lens blank for the manufacture of an optically non correcting lens, having a high curvature, corresponding to an average radius of curvature at most equal to about 90 mm, said lens blank comprising a transparent blade, and having on the one hand, a geometrical axis, passing through said blade and defining a geometrical center, and on the other hand, an optical axis defining an optical center, the blade, when seen in elevation, further having a generally non circular contour, the optical axis and geometrical axis, and thus the optical and geometrical centers, being physically separated by a predetermined distance from each other and angularly displaced, the blade further comprising stacking correction means, which are integrated with or affixed to the contour of the blank.
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Family
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Cited Art Landscape
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