Patent · US Active

Set of spectacle lens semifinished products, apparatus for making spectacle lenses and method therefor

US9733492B2 · kind B2 · utility

1Cited by

12References

16Claims

0Family size

Assignee

Carl Zeiss Vision International GmbH · DE

Inventors

Georg Michels · Aalen, DE
Timo Kratzer · Aalen, DE
Gerd Nowak · Schwarzenbek, DE

Key dates

Filing date	Oct 31, 2016
Grant date	Aug 15, 2017
Priority date	—
Expiry date	Oct 31, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG02C2202/08
WIPO fieldOptics
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.