The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 2021
Filed:
Apr. 10, 2019
Carl Zeiss Vision International Gmbh, Aalen, DE;
Ray Steven Spratt, Petaluma, CA (US);
Carl Zeiss Vision International GmbH, Aalen, DE;
Abstract
A series of spectacle lenses is disclosed, wherein each lens has a spherical front surface and an aspheric, atoric, or freeform back surface. Further, each lens of the series provides a focal power Pbetween −6 D and +4 D; and at least one lens of the series provides a focal power Pbetween at least one of (a) −0.75 D and +2.25 D and (b) −0.5 D and +2.00 D. For an upper range of focal powers, lenses having the same nominal front surface power are provided; and for a lower range of trough powers, lenses having the same minimum nominal back surface power are provided. The spherical front surface has a nominal front surface power Pand the back surface has a minimum nominal back surface power P; wherein 15.5 D≤|P|+|P|+|P|≤31.5 D applies for each spectacle lens of the series.