Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Walter Haimerl0
Gregor Esser0
Helmut Altheimer0
Martin Zimmerman0
Andrea Welk0
Edda Wehner0
Date of Patent
May 1, 2007
0Patent Application Number
111283020
Date Filed
May 13, 2005
0Patent Primary Examiner
Patent abstract
A double-progressive spectacle lens in which the progressive action is distributed over the front and rear surfaces of the double-progressive spectacle lenses and described by the quotient QQ=Addvfl/AddGesamtwhere Addvfl represents the increase in the surface dioptric power along the principal line on the front surface between the distance area and the near area, and ADDGesamt represents the increase in the total dioptric power along the principal line between the distance area and the near area, and the fraction Q increases with growing distance area effect F:
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