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US 2019/0293967 A1Published application
Spectacle lens, spectacle lens producing apparatus, spectacle lens designing method, and spectacle lens designing program
AssigneeHoya Lens Thailand Ltd.
InventorHua QI
Life of this patent
Estimating the term…
Abstract
A pair of right and left spectacle lenses each includes: a distance vision region and a near vision region; and a progressive region in which a refractive power progressively changes between the distance vision region and the near vision region. In the pair of right and left spectacle lenses mounted in a spectacle frame, a height position of a distance eye point that is a reference point of the distance vision region is different between right and left, and a corridor length connecting the distance vision region and the near vision region is different between right and left.
Claims14
A spectacle lens wherein
- in the pair of right and left spectacle lenses,
- the pair of right and left spectacle lenses each includes:
- a distance vision region and a near vision region;
- and a progressive region in which a refractive power progressively changes between the distance vision region and the near vision region;
- and
- in the pair of right and left spectacle lenses mounted in a spectacle frame,
- a height position of a distance eye point that is a reference point of the distance vision region is different between right and left, and
- a corridor length connecting the distance vision region and the near vision region is different between right and left.
5 more elements
A spectacle lens producing apparatus for producing a pair of right and left spectacle lenses each including:
- a distance vision region and a near vision region;
- and a progressive region in which a refractive power progressively changes between the distance vision region and the near vision region, the spectacle lens producing apparatus comprising:
- a reference lens setting means to set a reference lens common to right and left based on prescription information of a wearer;
- a reference object surface setting means to set a reference object surface formed of a plurality of object points arranged at different object distances based on the reference lens on right and left;
- and
- a designing means to set right and left prescription lenses based on prescription information of the wearer, set the right and left prescription lenses such that a height position of a distance eye point that is a reference point of the distance vision region is different between right and left in a state of being mounted in a spectacle frame, and design, for each prescription lens of the set right and left prescription lenses, a corridor of the prescription lens based on a principal ray from each object point on the reference object surface.
3 more elements
A spectacle lens designing method for designing a pair of right and left spectacle lenses each including:
- a distance vision region and a near vision region;
- and a progressive region in which a refractive power progressively changes between the distance vision region and the near vision region, the spectacle lens designing method comprising:
- a reference lens setting step of setting a reference lens common to right and left based on prescription information of a wearer;
- a reference object surface setting step of setting a reference object surface formed of a plurality of object points arranged at different object distances based on the reference lens on right and left;
- and
- a designing step of setting right and left prescription lenses based on prescription information of the wearer, setting the right and left prescription lenses such that a height position of a distance eye point that is a reference point of the distance vision region is different between right and left in a state of being mounted in a spectacle frame, and designing, for each prescription lens of the set right and left prescription lenses, a corridor of the prescription lens based on a principal ray from each object point on the reference object surface.
3 more elements
A spectacle lens designing program for designing a pair of right and left spectacle lenses each including:
- a distance vision region and a near vision region;
- and a progressive region in which a refractive power progressively changes between the distance vision region and the near vision region, the spectacle lens designing program causing a computer to execute:
- a reference lens setting step of setting a reference lens common to right and left based on prescription information of a wearer;
- a reference object surface setting step of setting a reference object surface formed of a plurality of object points arranged at different object distances based on the reference lens on right and left;
- and
- a designing step of setting right and left prescription lenses based on prescription information of the wearer, setting the right and left prescription lenses such that a height position of a distance eye point that is a reference point of the distance vision region is different between right and left in a state of being mounted in a spectacle frame, and designing, for each prescription lens of the set right and left prescription lenses, a corridor of the prescription lens based on a principal ray from each object point on the reference object surface.
3 more elements
Dependencies are inferred from the claim text.