Set of spectacle lens semifinished products, apparatus for making spectacle lenses and method therefor
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United States of America Patent
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Aug 15, 2017
Issued Date -
N/A
app pub date -
Oct 31, 2016
filing date -
Jul 10, 2014
priority date (Note) -
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Abstract
A set of eyeglass lens semifinished products is provided and is composed of at least three series of eyeglass lens semifinished products having spherical or rotationally symmetric aspherical front surfaces. The series of eyeglass lens semifinished products differ in pairs in the base material of the series. Each of the series includes at least three types of eyeglass lens semifinished products which differ in pairs and the front surface shapes. The front surface shapes of the at least three types are identical on a central partial surface within the actual surface refractive power range of the front surface of the series in relation to a standard index of refraction of 1.53 between 3.2 D and 6.7 D.
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