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:
Aug. 10, 2021
Filed:
Jan. 20, 2021
Carl Zeiss Vision International Gmbh, Aalen, DE;
Carl Zeiss Vision International GmbH, Aalen, DE;
Abstract
A progressive spectacle lens includes a substrate which has a front face and a rear face and is made from a material with a regionally varying refractive index, wherein the front face and/or the rear face has/have a free-form surface geometry. The progressive spectacle lens complies with the following optical requirements: (1) a prescribed dioptric power in the distance reference point within the permissible limit deviations in accordance with EN ISO 8980-2:2004 and a prescribed dioptric power in the near reference point within the permissible limit deviations in accordance with EN ISO 8980-2:2004, (2) a monotonically steady increase in the dioptric power between the distance reference point and near reference point along a principal line of vision, and (3) a progression channel. The progressive spectacle lens has a free-form surface geometry of the front face and/or rear face.