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公开(公告)号：US12099260B2
公开(公告)日：2024-09-24
申请号：US17280953
申请日：2019-09-27
Applicant: HOYA LENS THAILAND LTD.
Inventor： Hiroshi Asami , Yasunori Izawa , Tadashi Kaga
IPC: G02C7/06
CPC classification number: G02C7/063
Abstract: A progressive addition lens includes: a near portion for viewing a near distance, a distance portion for viewing a distance farther than the near distance, and an intermediate portion between the near portion and the distance portion and having a progressive refraction function. A transmission astigmatism is added to at least the near portion and the intermediate portion, and in the near portion and the intermediate portion to which the transmission astigmatism is added, after subtracting the refractive power for astigmatism correction, the progressive addition lens further includes a portion where the amount of vertical refractive power is greater than the amount of horizontal refractive power.
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公开(公告)号：US10401649B2
公开(公告)日：2019-09-03
申请号：US15576262
申请日：2016-05-26
Applicant: HOYA LENS THAILAND LTD. , Hiroshi Asami , Ayumu Ito
Inventor： Hiroshi Asami , Ayumu Ito
Abstract: When an addition power at a position corresponding to a fitting point within a prescription addition power is greater than a target addition power set according to a target distance, the target addition power is set as an addition power between a progression-start point and a progression-end point on a principal meridian, and in addition the average gradient of an addition power between the progression-start point and the fitting point is set to differ from an average gradient of an addition power between the fitting point and the progression-end point. When the addition power at the position corresponding to the fitting point within the prescription addition power is equal to or smaller than the target addition power, a gradient of the addition power is made constant in a partial region including at least the fitting point between the progression-start point and the progression-end point on the principal meridian.
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公开(公告)号：US12140821B2
公开(公告)日：2024-11-12
申请号：US17280997
申请日：2019-09-27
Applicant: HOYA LENS THAILAND LTD.
Inventor： Hiroshi Asami , Yasunori Izawa , Tadashi Kaga
Abstract: A progressive addition lens and the related technology, the progressive addition lens including a near portion for viewing a near distance, a distance portion for viewing a distance farther than the near distance, and an intermediate portion between the near portion and the distance portion and having a progressive refraction function, in which the transmission astigmatism is added to the near portion and the intermediate portion of the distance portion, the near portion, and the intermediate portion, and in the near portion and the intermediate portion to which the transmission astigmatism is added, the progressive addition lens further includes a portion where an amount of horizontal refractive power is greater than an amount of vertical refractive power after subtracting the refractive power for astigmatism correction.
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公开(公告)号：US10545354B2
公开(公告)日：2020-01-28
申请号：US15576266
申请日：2016-05-26
Applicant: HOYA LENS THAILAND LTD.
Inventor： Hiroshi Asami , Ayumu Ito
Abstract: A vision simulation, on assumption that spectacles are worn, is performed for a first model designed by setting a target additional power of a desirable value at a position corresponding to a fitting point on a principal meridian. A correction amount is computed for correcting the difference between a simulation value obtained for the additional power at the position corresponding to the fitting point on the principal meridian through the vision simulation and the target additional power. A second model is designed by replacing the additional power with a value obtained by the addition of the calculated correction amount to the target additional power.
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