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US 12,645,098 B2Granted
Mold manufacturing method, optical member manufacturing method, and spectacle lens
AssigneeHoya Lens Thailand Ltd.
InventorsShigeki Ookubo, Takako Ishizaki
Life of this patent
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Abstract
There is provided a mold manufacturing method, including: preparing a glass mold formed of a glass material, as a molding mold for manufacturing an optical member having convex defocus portions on at least one of optical surfaces (S11); and irradiating a surface of the glass mold for forming the optical surface, with a short-pulse laser beam to form concave portions corresponding to the defocus portions (S12).
Claims12
A mold manufacturing method, comprising:
- preparing a glass mold formed of a glass material, as a molding mold for manufacturing an optical member having convex defocus portions on at least one of optical surfaces;
- and
- irradiating a surface of the glass mold for forming the optical surface, with a short-pulse laser beam to form concave portions corresponding to the defocus portions,
- wherein one of the concave portions is formed by multiple shots of the short-pulse laser beam, and a depth of forming the concave portion is controlled by an overlap between shots.
1 more element
A spectacle lens having optical surfaces on an object side and an eyeball side respectively, the spectacle lens comprising:
- defocus regions where defocus portions are formed, and base regions where the defocus portions are not formed, on at least one of the optical surfaces,
- wherein the defocus portions are formed at a plurality of locations, and when the defocus portions have a shape of X-fold rotational symmetry and an arrangement of the defocus portions is Y-fold rotational symmetry, both X and Y are multiples of 3 or both X and Y are multiples of 4.
Dependencies are inferred from the claim text.