Patent ID: 11947191
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,
wherein the eyeglass lens has a configuration for reducing, from among light 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, a proportion of the light rays that pass through neither inside of the radius of 0.1 mm of the predetermined position A nor inside of the radius of 0.1 mm of any of a plurality B of positions that are closer to the object than the predetermined position A is;
a coating film covering the at least one of the object-side surface and the eyeball-side surface including 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

wherein, out of a number of rays from a point source at infinity that evenly enter a predetermined range of the object side of the eyeglass lens and pass through the coating film, the proportion that pass through neither inside of the radius of 0.1 mm of the predetermined position A nor inside of the radius of 0.1 mm of any of the plurality B of positions is less than or equal to 30% of the number of rays;
wherein, for at least one of the plurality of coating film convex portions, a relationship between a protruding length Lc of the coating film convex portion and a protruding length Ll of the corresponding base material convex portion satisfies Formula (1) below,

0.6≤Lc/Ll≤1.5  Formula (1).