Patent ID: 11880094
Assignee: HOYA LENS THAILAND LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An eyeglass lens configured to cause rays from a point source at infinity that enter the eyeglass lens at an object side of the eyeglass lens to exit the eyeglass lens from an eyeball side of the eyeglass lens and converge at a predetermined position A, the eyeglass lens comprising:
a lens base material having an object-side surface and an eyeball-side surface, at least one of the object-side surface and the eyeball-side surface including a plurality of base material convex portions; and
a coating film covering the at least one of the object-side surface and the eyeball-side surface that includes the plurality of base material convex portions,
wherein the coating film includes a plurality of coating film convex portions, and
wherein, for each of the plurality of coating film convex portions:
a shape of an outermost surface of the coating film convex portion originates from a shape of an outermost surface of a corresponding one of the plurality of base material convex portions, and
the coating film convex portion is configured to cause rays from a point source at infinity that have entered the eyeglass lens to converge at a corresponding one of the plurality B of positions that is closer to the object than the predetermined position A is, and
a maximum absolute value of differences in a lens thickness direction between a spherical surface that is optimally approximated to a shape of the coating film convex portion and the shape of the actual coating film convex portion is 0.1 μm or less

wherein, at the at least one of the object-side surface and the eyeball-side surface that includes the plurality of base material convex portions, a corresponding outermost surface of the eyeglass lens includes a plurality of convex portions, and
wherein, for each of the plurality of convex portions, a shape of the convex portion approximates a shape of a corresponding one of the plurality of base material convex portions, and
wherein the plurality of base material convex portions is configured to cause rays from a point source at infinity that have entered the eyeglass lens to converge at a plurality of positions B that are closer to the object than the predetermined position A is.