US 11,906,820 B2
Spectacle lens and a method for producing a spectacle lens
Katharina Rifai, Tübingen (DE); Siegfried Wahl, Donzdorf (DE); and Timo Kratzer, Aalen (DE)
Assigned to Carl Zeiss Vision International GmbH, Aalen (DE)
Filed by Carl Zeiss Vision International GmbH, Aalen (DE)
Filed on Mar. 28, 2023, as Appl. No. 18/191,053.
Application 18/191,053 is a division of application No. 18/166,064, filed on Feb. 8, 2023, granted, now 11,809,023.
Application 18/166,064 is a continuation of application No. PCT/EP2021/072138, filed on Aug. 9, 2021.
Claims priority of application No. 20190303 (EP), filed on Aug. 10, 2020.
Prior Publication US 2023/0236438 A1, Jul. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G02C 7/02 (2006.01); G02C 13/00 (2006.01)
CPC G02C 7/027 (2013.01) [G02C 13/003 (2013.01); G02C 2202/20 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A spectacle lens for at least one eye of a user, the spectacle lens comprising:
a lens body having at least one permanent marking, wherein the at least one permanent marking is or contains at least one diffractive structure, wherein at least one diffractive pattern generated by illumination of the diffractive structure is configured to be invisible upon a first kind of illumination and configured to be visible only upon a second kind of illumination, wherein being visible is a property of the at least one diffractive pattern of being perceived by the at least one eye of the user, and wherein being invisible is a property of the at least one diffractive pattern of not being perceived by the at least one eye of the user,
wherein the at least one diffractive pattern is configured to be visible only under illumination in at least one of a near-infrared spectral region and a near-ultraviolet spectral region, wherein the at least one permanent marking is configured to provide information about at least one of a location on the lens body, and wherein the information about the at least one location on the lens body is selected from at least one of:
a distance reference point;
at least one near reference point;
a fitting cross;
a prism reference point; and
an alignment reference marking.