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WO2010044266A1 - Lentille à puissance progressive et série de lentilles à puissance progressive - Google Patents

Lentille à puissance progressive et série de lentilles à puissance progressive Download PDF

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Publication number
WO2010044266A1
WO2010044266A1 PCT/JP2009/005371 JP2009005371W WO2010044266A1 WO 2010044266 A1 WO2010044266 A1 WO 2010044266A1 JP 2009005371 W JP2009005371 W JP 2009005371W WO 2010044266 A1 WO2010044266 A1 WO 2010044266A1
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WO
WIPO (PCT)
Prior art keywords
power
progressive
lens
distance
addition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2009/005371
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English (en)
Japanese (ja)
Inventor
矢成光弘
水野正朝
内山幸昌
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Nikon Essilor Co Ltd
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Nikon Essilor Co Ltd
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Priority claimed from JP2008265631A external-priority patent/JP5135159B2/ja
Priority claimed from JP2008265630A external-priority patent/JP5135158B2/ja
Application filed by Nikon Essilor Co Ltd filed Critical Nikon Essilor Co Ltd
Publication of WO2010044266A1 publication Critical patent/WO2010044266A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G02C7/061—Spectacle lenses with progressively varying focal power
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/024—Methods of designing ophthalmic lenses
    • G02C7/027—Methods of designing ophthalmic lenses considering wearer's parameters

Definitions

  • the present invention relates to a progressive-power lens used as an aid to eye accommodation, and more particularly to a progressive-power lens and a progressive-power lens series in which both the outer surface and the inner surface of the lens are aspherical.
  • a progressive power lens having a progressive portion which is a connected area.
  • Progressive-power lenses do not need to be exchanged or detached when viewing at a distance or near vision, and the lens has no clear borders and is excellent in appearance. It is like that.
  • progressive-power lenses have used semi-finished lenses with progressive-reflecting surfaces pre-processed on the outer surface because of the need for manufacturing simplicity and cost reduction.
  • the same semi-finished product within a certain prescription power range The lens is shared.
  • an inner surface progressive addition lens in which a progressive surface is arranged on the inner surface as a prescription surface and a progressive addition lens in which both the outer surface and the inner surface are aspherical have been commercialized.
  • a double-sided progressive-power lens that progressively forms the outer surface and inner surface has the potential to improve optical performance and generate progressive-power lenses with new optical performance that were difficult with conventional single-sided progressive-power lenses. Therefore, it is attracting attention as an important technology.
  • Patent Document 1 astigmatism is improved as compared with a conventional progressive-power lens, and the magnification difference due to the difference in refractive power between the distance portion and the near portion is improved.
  • an inner surface progressive addition lens with a progressive surface on the inner surface and a progressive surface with a surface addition of negative or positive value on the outer surface are arranged to increase the positive addition on the inner surface.
  • a technique of a double-sided progressive-power lens in which a progressive surface having the same is arranged is disclosed.
  • Patent Document 2 as a double-sided progressive addition lens in which progressive surfaces are arranged on both the outer surface and the inner surface, one of the surfaces is a progressive surface having a positive addition and the other has a negative addition.
  • a technique has been disclosed in which a progressive surface is used to cancel the astigmatism generated on the progressive surface with the astigmatism generated on the progressive surface, thereby reducing the aberration of light transmitted through the lens.
  • the conventional progressive-power lens has been evaluated mainly by the optical performance of the surface refractive power of the progressive surface such as the distribution of surface astigmatism on the progressive surface and the distribution of surface average refractive power.
  • optical performance of the refractive power of the progressive surface (hereinafter referred to as “optical performance of the refractive surface”) and the light beam equivalent to the line of sight when the wearer uses the progressive power lens.
  • optical performance of transmitted light is almost the same.
  • the optical performance of the refracting surface and the optical performance of the transmitted light are almost equal for light incident at an angle close to perpendicular to the lens surface.
  • the optical performance of the refracting surface and the optical performance of the transmitted light do not match. Such a tendency increases as the incident angle of the light ray on the lens surface increases, and the various aberrations occur on the outer surface and the inner surface of the lens, respectively.
  • This discrepancy between the optical performance of the refracting surface and the optical performance of the transmitted light is due to prescription values such as spherical power, astigmatism power, addition power, prism prescription, and lens usage conditions such as frame shape and object distance.
  • prescription values such as spherical power, astigmatism power, addition power, prism prescription, and lens usage conditions such as frame shape and object distance.
  • the optical performance of the progressive power lens when it is actually worn depends on the outer surface because it varies depending on the combination of various conditions such as lens shape conditions such as base curve and progressive surface addition. It is difficult to simply evaluate the optical performance of the refracting surface of the progressive surface set on the inner surface.
  • the optical performance of the transmitted light in consideration of the prescription and usage of the wearer, not the optical performance of the refracting surface of the progressive surface as in the past, is the target progressive refractive power. It is necessary to optimize the optical performance of so-called transmitted light (hereinafter simply referred to as “optimization”) to improve the lens so that it is closer to the optical performance of the lens, and to determine the shape of the correction surface of the progressive-power lens. is there.
  • the purpose of the aspect of the present invention is to optimize the optical performance of transmitted light in consideration of the wearer's prescription and usage conditions, etc. It is an object of the present invention to provide a progressive power lens and a progressive power lens series which are equal to a specified value and can keep the optical performance of transmitted light good.
  • a progressive-power lens has an outer surface that is a refractive surface on the object side in a worn state and an inner surface that is a refractive surface on the eyeball side in a worn state, and at least of the outer surface and the inner surface One is provided at the upper position of the lens in the wearing state and is relatively suitable for far vision, and the near part is provided at the lower position of the lens in the wearing state and relatively suitable for near vision;
  • One of these is a reference surface having a predetermined surface shape, the other is a correction surface, the distance power specified by the prescription value is S, the astigmatism power specified by the prescription value is C, and the addition power specified by the prescription value Is the add, and the surface average refractive power at the near reference point of the reference surface and the reference surface
  • the surface addition of the reference surface which is the difference from the
  • Progressive-power lenses have the advantage that the greater the add power, the less the adjustment power required for near vision, but the various aberrations that occur in the entire lens occur almost in proportion to the value of the add power. Therefore, the larger the wearing addition, the more aberration and image distortion occur.
  • the sum of the surface addition ADDb (S, C, add) on the reference surface and the surface addition ADDc (S, C, add) on the correction surface is used as the addition of the entire lens. It was found that, when set equal to the addition add designated by the prescription, the wearing addition ADD in the transmitted light when the lens is actually worn becomes larger than the prescription addition add.
  • the addition add in which the sum of the surface addition ADDb (S, C, add) on the reference surface and the surface addition ADDc (S, C, add) on the correction surface is designated by the prescription value.
  • the plurality of progressive-power lenses can be formed such that the surface addition of each of the reference surfaces has a constant value and the surface addition of each of the correction surfaces becomes a variable. .
  • the surface addition on one side is kept constant and the sum of the surface additions on both sides is adjusted while changing the surface addition on the other side. Since it becomes easy to adjust the sum of the degrees, it becomes easy to make the wearing addition ADD of the lens equal to the prescription addition add.
  • the plurality of progressive-power lenses have a constant surface average refractive power at the distance reference point of each of the reference surfaces, and the surface average power at the distance reference point of each of the correction surfaces. It can be configured to be a variable.
  • the surface average refractive power of the distance reference point on one surface is made constant, and the surface average of the distance reference point on both surfaces is changed while changing the surface average refractive power of the distance reference point on the other surface.
  • the progressive-power lens according to the aspect of the present invention is a progressive-power lens included in a progressive-power lens series corresponding to a plurality of different prescriptions, and includes an outer surface serving as a refractive surface on the object side in a worn state, and a worn state And an inner surface which is a refractive surface on the eyeball side, and at least one of the outer surface and the inner surface is provided at a position above the lens in a wearing state, Provided in the lower position of the lens in a state, relatively suitable for near vision, provided between the distance portion and the near portion, between the distance portion and the near portion A progressive portion whose surface refractive power changes progressively, and one of the outer surface and the inner surface is a reference surface having a predetermined surface shape, and the other is a correction surface, and is for distance use specified by a prescription value
  • the power is C (S)
  • the addition power specified by the prescription value is add (S)
  • Sp is the distance power when the addition power ADDc (S) of the correction surface takes the maximum value
  • a first progressive-power lens whose power is the first distance power Sl, and the distance power Is selected as the second progressive power lens having the second distance power Sh larger than the first distance power S1, the astigmatism power C (Sl) and the addition power in the first progressive power lens are selected.
  • the progressive addition lens has an advantage that the greater the addition, the less adjustment power necessary for near vision is required, but various aberrations occurring in the entire lens are almost equal to the addition value. Since they occur proportionally, the larger the wearing addition, the greater the aberrations and image distortion that occur.
  • the wearing power of all progressive power lenses included in the progressive power lens series set so that the optical effects on the lens wear and the basic specifications of the lenses are equal is necessary for the wearer. It is necessary to set it equal to the addition specified by the prescription.
  • the astigmatic power C specified by the prescription value is equal between the first progressive power lens and the second progressive power lens among the plurality of progressive power lenses, and the prescription value
  • the specified addition add is equal and the surface addition ADDb of the reference surface is equal
  • the surface addition ADDc of each correction surface decreases as the distance power S increases
  • Sp ⁇ Sh the surface addition ADDc of each correction surface is set to decrease as the distance power S decreases.
  • the optical performance of the transmitted light in consideration of the wearer's prescription and usage conditions so as to satisfy the above relationship when comparing any two of the plurality of progressive-power lenses It is possible to improve the addition power, which is an important specification in the progressive power lens, to be equal to the value specified in the prescription value and to make the optical performance of the transmitted light closer to the optical performance of the target progressive power lens. It has become possible. As a result, the optical effects on lens wearing and the basic specifications of the lens can be made equal in the lens series. In addition, it is preferable to optimize the optical performance of the transmitted light in the present invention in consideration of the influence of the rotational movement of the eye due to the law of listing. In the above conditional expression, the unit of refractive power is represented by diopter (D) unless otherwise specified.
  • D diopter
  • the progressive-power lens according to the aspect of the present invention is a progressive-power lens included in a progressive-power lens series corresponding to a plurality of different prescriptions, and includes an outer surface serving as a refractive surface on the object side in a worn state, and a worn state And an inner surface which is a refractive surface on the eyeball side, and at least one of the outer surface and the inner surface is provided at a position above the lens in a wearing state, Provided in the lower position of the lens in a state, relatively suitable for near vision, provided between the distance portion and the near portion, between the distance portion and the near portion A progressive portion whose surface refractive power changes progressively, and one of the outer surface and the inner surface is a reference surface having a predetermined surface shape, and the other is a correction surface, and is for distance use specified by a prescription value
  • the power is C (S)
  • the addition power specified by the prescription value is add (S)
  • the astigmatic power C specified by the prescription value is equal between the first progressive power lens and the second progressive power lens among the plurality of progressive power lenses, and the prescription value
  • the specified addition add is equal and the surface addition ADDb of the reference surface is equal
  • the surface addition ADDc of the correction surface is set to decrease as the distance power S increases. It was.
  • the optical performance of the transmitted light in consideration of the wearer's prescription and usage conditions so as to satisfy the above relationship when comparing any two of the plurality of progressive-power lenses It is possible to improve the addition power, which is an important specification in the progressive power lens, to be equal to the value specified in the prescription value and to make the optical performance of the transmitted light closer to the optical performance of the target progressive power lens. It has become possible. As a result, the optical effects on lens wearing and the basic specifications of the lens can be made equal in the lens series.
  • the optimization of the optical performance of the transmitted light in the above aspect of the present invention is preferably performed in consideration of the influence of the rotational movement of the eye due to the law of listing. Also in the above conditional expression, the unit of refractive power is represented by diopter (D) unless otherwise specified.
  • the optical power of the transmitted light is optimized in consideration of the wearer's prescription and usage conditions, and the addition, which is an important specification in the progressive power lens, is determined by the prescription value. It is possible to make the optical performance of the transmitted light closer to the optical performance of the target progressive-power lens by making it equal to the specified value.
  • the unit of refractive power is represented by diopter (D) unless otherwise specified.
  • the glasses are used when the progressive power lens is processed for spectacles. It is based on the positional relationship of the lenses when worn. Also in the following drawings, the positional relationship (up / down / left / right) of the lens is the same as the positional relationship (up / down / left / right) with respect to the paper surface.
  • the object side surface is referred to as an “outer surface” and the eyeball side surface is referred to as an “inner surface”.
  • FIG. 1 is a diagram showing an outline of region division in the progressive-power lens according to the present embodiment.
  • the progressive addition lens LS is in a state before processing the lens according to the shape of the spectacle frame (a state before lashing processing), and is formed in a circular shape in plan view. .
  • the progressive-power lens LS is arranged on the upper side in the figure when worn, and the lower side in the figure is arranged on the lower side when worn.
  • the progressive addition lens LS has a distance portion F, a near portion N, and a progressive portion P.
  • the progressive power lens series according to this embodiment is configured by combining a plurality of such progressive power lenses LS.
  • the distance portion F is disposed above the progressive addition lens LS, and after the progressive addition lens LS is processed for spectacles, it becomes a portion suitable for relatively far vision.
  • the near portion N is disposed below the progressive power lens LS, and becomes a portion suitable for near vision after the progressive power lens LS is processed for spectacles.
  • the progressive portion P is disposed between the distance portion F and the near portion N in the progressive power lens LS, and the surface refractive power between the distance portion F and the near portion N is progressively changed. It is a part to be made.
  • the progressive power lens LS has a plurality of reference points.
  • a reference point examples include an eye point (also called a fitting point) EP, an optical center point OG, a distance reference point OF, and a near reference point ON, as shown in FIG.
  • the eye point EP is a reference point when the wearer wears the lens.
  • the optical center point OG is the center point of the optical characteristics of the lens.
  • the distance reference point OF is a measurement reference point for measuring the distance power of the lens in the distance portion F.
  • the near reference point ON is a measurement reference point for measuring the near power of the lens in the near portion N.
  • the surface average refractive power at the distance reference point OF or the surface average power at the near reference point ON is set based on the distance power or near power specified by the prescription value, respectively.
  • a value obtained by subtracting the surface average refractive power of the near reference point OF from the surface average refractive power of the near reference point ON measured by the progressive addition lens LS is expressed as “surface addition power”.
  • the addition specified by the prescription value is “prescription addition”, and the average refractive power DN of the transmitted light LN passing through the near reference point ON of the lens to the average of the transmitted light LF passing through the distance reference point OF.
  • a value obtained by subtracting the refractive power DF is referred to as “wear addition power”.
  • the progressive addition lens LS has a main gaze MM 'that passes through the distance reference point OF and the near reference point ON and divides the refractive surface of the progressive surface into a nose side region and an ear side region.
  • the main gazing line MM ' is also called a main meridian and is used as an important reference line in designing a progressive surface.
  • the main gazing line is defined as a curve curved to the nose side from the distance portion F to the near portion N in consideration of the convergence at the near vision in the progressive power lens of the asymmetric design, and the progressive power lens of the symmetric design. Is defined as a straight line passing through the distance reference point OF and the near reference point ON.
  • FIG. 2 is a schematic diagram showing how light rays of the progressive-power lens LS pass in the wearing state.
  • an arbitrary light beam L corresponding to the line of sight of the wearer passes through a point O1 on the lens surface M1 that is the outer surface, a point O2 on the lens surface M2 that is the inner surface, and the rotation point RC of the eyeball.
  • An image is formed at a point OR on R.
  • the light ray passes through the point O1 and the point O2, it is refracted according to the incident angle with respect to each point.
  • the light beam LF passing through the distance reference point corresponding to the line of sight of the wearer passes through the distance reference point OF1 on the lens surface M1 which is the outer surface and the distance reference point OF2 on the lens surface M2 which is the inner surface. Further, an image is formed at a point ORf on the retina R of the eyeball through the rotation point RC of the eyeball.
  • the light ray passes through the point OF1 and the point OF2, it is refracted according to the incident angle with respect to each point.
  • the light beam LN passing through the near reference point corresponding to the line of sight of the wearer passes through the near reference point ON1 on the lens surface M1 that is the outer surface and the near reference point ON2 on the lens surface M2 that is the inner surface.
  • An image is formed at a point ORn on the retina R of the eyeball through the rotation point RC of the eyeball.
  • the lens surface M1 that is an outer surface is used as a reference surface
  • the lens surface M2 that is an inner surface is described as a correction surface formed in an aspherical shape in order to correct the optical performance of transmitted light.
  • the light beam L corresponding to the line of sight of the wearer hardly enters the lens surface perpendicularly except for the light beam passing through the vicinity of the optical axis OA of the lens, and the position where the light beam enters the lens surface is the position of the lens.
  • the incident angle on the lens surface tends to increase. In other words, various aberrations are caused by light rays passing through the periphery of the lens surface.
  • the distance reference point OF1 and the near reference point ON1 on the lens surface M1 and the distance reference point OF2 and the near reference point ON2 on the lens surface M2 are usually lens surfaces through which the optical axis OA of the lens passes.
  • the positions are set apart from the optical center OG1 on M1 and the optical center OG2 on the lens surface M2. That is, the light beam LF and the light beam LN do not enter the lens surface perpendicularly, and aberration occurs even in light beams passing through the distance reference point and the near reference point.
  • the lens surface M1 that is the outer surface is used as the reference surface
  • the lens surface M2 that is the inner surface is used as the correction surface
  • the distance power specified by the prescription value is S and is specified by the prescription value.
  • the astigmatism power is C and the prescription addition power is add
  • the surface addition power of the reference surface M1, which is the difference is ADDb (S, C, add)
  • the addition power of the correction surface M2 which is the difference from the average refractive power
  • the progressive addition lens LS is formed so as to satisfy the following conditional expression (1).
  • the progressive addition lens LS is preferably formed so as to satisfy the following conditional expression (2), and satisfies the following conditional expression (3). More preferably, it is formed. Furthermore, it is more preferable that it is formed so as to satisfy the following conditional expression (4).
  • the surface addition ADDb (S, C, (add) is a constant value
  • the surface addition ADDc (S, C, add) of the correction surface M2 can be used as a variable.
  • the surface average refractive power of the reference surface M1 at the distance reference point OF1 is PFb (S, C, add), and the surface average refractive power of the correction surface M2 at the distance reference point OF2 is PFc.
  • the progressive addition lens LS is formed so that the following conditional expression (5) is satisfied when S ⁇ 0, and the following conditional expression (6) is satisfied when S ⁇ 0. It is preferable that
  • the surface average refractive power at the distance reference point OF1 on the reference surface M1 as in the conventional progressive power lens is made equal to the distance power S.
  • the average refractive power DF of the transmitted light beam LF passing through the distance reference points OF1 and OF2 takes a value larger than the distance power S (DF ⁇ S> 0). Therefore, in order to make the average refractive power DF equal to the distance power S, it is necessary to make the sum of the surface average power PFb and the surface average power PFc smaller than the distance power S. It becomes.
  • the progressive addition lens LS is formed so that the conditional expression (7) below is satisfied when S> 0, and the conditional expression (8) below is satisfied when S ⁇ 0. Is preferred.
  • the value of the conditional expression is considered when taking into account the lens tolerance May be zero or a value that can be considered zero.
  • the surface average refractive power PFb (S, C, add) of the distance reference point OF1 is a constant value
  • the surface average refractive power PFc (S, C, add) of the distance reference point OF2 on the correction surface M2 is a variable. Can be adjusted. In this way, the surface average refractive power of the distance reference point OF on one surface is made constant, and the distance reference point OF on both surfaces is changed while changing the surface average power of the distance reference point OF on the other surface.
  • the sum of the surface addition ADDb (S, C, add) on the reference surface and the surface addition ADDc (S, C, add) on the correction surface is designated by the prescription value.
  • the diopter power is an important specification for progressive power lenses. It has become possible to make the addition power equal to the value specified by the prescription value and improve the optical performance of the transmitted light so as to be closer to the optical performance of the target progressive-power lens.
  • the outer surface M1 of the outer surface M1 and the inner surface M2 is the reference surface and the inner surface M2 is the correction surface.
  • the present invention is not limited to this.
  • the inner surface M2 is the reference surface
  • the outer surface M1 is Even in the configuration of the correction surface, the range of the above formulas (1) to (8) can be applied.
  • Table 1 shows the refractive index n of the progressive-power lens, the distance power S specified by the prescription value, the astigmatism power C indicated by the prescription value, the prescription addition add, and the surface addition ADDb (S, C at the reference surface).
  • Add surface addition ADDc (S, C, add) on the correction surface
  • value ADDb (S, C, add) obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface add) + ADDc (S, C, add) ⁇ add, surface average refractive power PFb (S, C, add) at the distance reference point on the reference surface, surface average power PFc (S, C) at the distance reference point on the correction surface C, add), a value obtained by subtracting the distance power S from the sum of the surface average refractive power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface PFb (S, C, add) + PFc (S, C, add)
  • progressive power lenses shown in Examples 1 to 13 were manufactured.
  • the progressive-power lenses shown in Examples 1 to 10 are common in that the optical refractive index n is 1.67 and the astigmatism power C is 0.00.
  • Example 1 In Example 1, the distance power S is 5.00, the prescription addition add is 3.50, the surface addition ADDb (S, C, add) on the reference surface is 4.00, and the surface addition ADDc ( S, C, add) is -1.02, surface average refractive power PFb (S, C, add) at the reference point for distance on the reference surface is 6.27, surface average power PFc at the reference point for distance on the correction surface (S, C, add) was set to ⁇ 1.62.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .52.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was -0.35.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 2 In Example 2, the distance power S is 3.00, the prescription addition add is 1.00, the surface addition ADDb (S, C, add) on the reference surface is 1.50, and the surface addition ADDc ( S, C, add) is ⁇ 0.59, the surface average refractive power PFb (S, C, add) at the reference point for distance on the reference surface is 6.27, and the surface average power PFc at the reference point for distance on the correction surface (S, C, add) was set to -3.44.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .09.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was -0.17.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 3 In Example 3, the distance power S is 2.00, the prescription addition add is 0.75, the surface addition ADDb (S, C, add) on the reference plane is 1.50, and the surface addition ADDc ( S, C, add) is ⁇ 0.88, the surface average refractive power PFb (S, C, add) at the distance reference point of the reference surface is 4.39, and the surface average power PFc at the distance reference point of the correction surface (S, C, add) was set to -2.50.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .13.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was -0.11.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 4 In Example 4, the distance power S is 0.00, the prescription addition add is 2.00, the surface addition ADDb (S, C, add) on the reference surface is 2.50, and the surface addition ADDc ( S, C, add) is ⁇ 0.66, the surface average refractive power PFb (S, C, add) at the distance reference point on the reference surface is 4.39, and the surface average power PFc at the distance reference point on the correction surface is (S, C, add) was set to -4.42.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .16.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was -0.03.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 5 In Example 5, the distance power S is -1.00, the prescription addition add is 3.50, the surface addition ADDb (S, C, add) on the reference surface is 4.00, and the surface addition ADDc on the correction surface. (S, C, add) is -0.83, the surface average refractive power PFb (S, C, add) at the distance reference point of the reference surface is 2.51, and the surface average power at the distance reference point of the correction surface PFc (S, C, add) was set to -3.47.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .33.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.04.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 6 In Example 6, the distance power S is ⁇ 3.00, the prescription addition add 2.00, the surface addition ADDb (S, C, add) on the reference surface is 2.50, and the surface addition ADDc on the correction surface. (S, C, add) is -0.70, surface average refractive power PFb (S, C, add) at the reference point for distance on the reference surface is 2.51, surface average refractive power at the reference point for distance on the correction surface PFc (S, C, add) was set to ⁇ 5.42.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .20.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.09.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 7 In Example 7, the distance diopter S is -5.00, the prescription addition add is 1.00, the surface addition ADDb (S, C, add) on the reference surface is 1.50, and the surface addition ADDc on the correction surface. (S, C, add) is -0.68, surface average refractive power PFb (S, C, add) at the reference point for distance on the reference surface is 2.51, surface average refractive power at the reference point for distance on the correction surface PFc (S, C, add) was set to ⁇ 7.40.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .18.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.11.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 8 In Example 8, the distance power S is ⁇ 6.00, the prescription addition add is 0.75, the surface addition ADDb (S, C, add) on the reference surface is 1.50, and the surface addition ADDc on the correction surface. (S, C, add) is ⁇ 0.91, surface average refractive power PFb (S, C, add) at the reference point for distance on the reference surface is 1.25, surface average refractive power at the reference point for distance on the correction surface PFc (S, C, add) was set to ⁇ 7.08.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .16.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.17.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 9 In Example 9, the distance diopter S is ⁇ 8.00, the prescription addition add is 1.75, the surface addition ADDb (S, C, add) on the reference surface is 2.50, and the surface addition ADDc on the correction surface. (S, C, add) is -1.17, surface average refractive power PFb (S, C, add) at the reference point for distance on the reference surface is 1.25, surface average refractive power at the reference point for distance on the correction surface PFc (S, C, add) was set to ⁇ 9.09.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .42.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.16.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 10 In Example 10, the diopter power S is ⁇ 10.00, the prescription addition add is 3.25, the surface addition ADDb (S, C, add) on the reference plane is 4.00, and the surface addition ADDc on the correction plane. (S, C, add) is -1.51, surface average refractive power PFb (S, C, add) at the distance reference point of the reference surface is 1.25, surface average power at the distance reference point of the correction surface PFc (S, C, add) was set to -11.13.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .76.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.12.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the refractive index n is 1.60
  • the distance diopter S is ⁇ 10.00
  • the prescription addition add is 3.25
  • the surface addition ADDb (S, C, add) at the reference plane is 4.00.
  • the surface addition ADDc (S, C, add) on the correction surface is -1.59
  • the surface average refractive power PFb (S, C, add) at the distance reference point on the reference surface is 1.13
  • the distance on the correction surface is
  • the surface average refractive power PFc (S, C, add) at the reference point for use was set to -11.04.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .84.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.09.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 12 In Example 12, the refractive index n is 1.74, the distance diopter S is ⁇ 10.00, the prescription addition add is 3.25, and the surface addition ADDb (S, C, add) at the reference plane is 4.00.
  • the surface addition ADDc (S, C, add) on the correction surface is -1.44, the surface average refractive power PFb (S, C, add) at the distance reference point on the reference surface is 1.38, the distance on the correction surface is The surface average refractive power PFc (S, C, add) at the reference point for use was set to -11.23.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .69.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.15.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • Example 13 In Example 13, the refractive index n is 1.74, the distance diopter S is ⁇ 12.00, the prescription addition add is 3.25, and the surface addition ADDb (S, C, add) at the reference plane is 4.00.
  • the surface addition ADDc (S, C, add) on the correction surface is ⁇ 1.69, the surface average refractive power PFb (S, C, add) at the distance reference point on the reference surface is 1.38, and the distance on the correction surface is The surface average refractive power PFc (S, C, add) at the reference point for use was set to -13.28.
  • a value ADDb (S, C, add) + ADDc (S, C, add) ⁇ add obtained by subtracting the value of the addition from the sum of the surface addition on the reference surface and the surface addition on the correction surface is ⁇ 0. .94.
  • a value PFb (S, C, add) + PFc (S) obtained by subtracting the distance power S from the sum of the surface average power at the distance reference point of the reference surface and the surface average power at the distance reference point of the correction surface. , C, add) -S was 0.10.
  • the value of the wear addition ADD is equal to the prescription addition add, and the average refractive power DF of the transmitted light passing through the distance reference point is equal to the distance diopter S designated by the prescription value.
  • the distance diopter S designated by the prescription value.
  • the surface average refractive power PFc (S, C, add) at the reference point OF it is possible to make the distance power and addition, which are the most important specifications of the progressive power lens, equal to the values specified in the prescription.
  • the optical performance of transmitted light can be kept good.
  • Example 1 Example 5, and Example 10
  • Example 2 Example 3, Example 7, and Example 8
  • Example 4 Example 6
  • the surface addition ADDb (S, C, add) on the reference surface is equal, and only the surface addition ADDc (S, C, add) on the correction surface is different.
  • the surface addition ADDb (S, C, add) on the reference surface is set to a constant value, and the surface addition ADDc (S, C, add) on the correction surface is used as a variable, and ADDb (S, C, add). It is also possible to adjust the value of + ADDc (S, C, add) ⁇ add.
  • Example 1 and Example 2 between Example 3 and Example 4, between Example 5, Example 6 and Example 7, Example 8, Example 9 and Example 10.
  • the surface average refractive power PFb (S, C, add) at the distance reference point of the reference surface is equal, and the surface average power PFc (S, C, add) at the distance reference point of the correction surface is the same. only add) is different.
  • the surface average refractive power PFb (S, C, add) at the distance reference point on the reference surface is set to a constant value, and the surface average power PFc (S, C, add) at the distance reference point on the correction surface is set. It is also possible to adjust the value of PFb (S, C, add) + PFc (S, C, add) ⁇ S, using as a variable. Adjusting the sum of the surface average refractive powers at the distance reference points on both sides while changing the surface average power at the distance reference point on the other surface while keeping the surface average power at one distance reference point constant. Thus, the sum of the surface average refractive powers at the distance reference points on both surfaces can be easily adjusted, and can be adjusted to a more preferable value.
  • an arbitrary light beam L corresponding to the line of sight of the wearer has a point O1 on the lens surface M1 that is the outer surface, a point O2 on the lens surface M2 that is the inner surface, and the rotation point RC of the eyeball. It forms an image at a point OR on the retina R of the eyeball.
  • the light beam LF passing through the distance reference point corresponding to the line of sight of the wearer passes through the distance reference point OF1 on the lens surface M1 which is the outer surface and the distance reference point OF2 on the lens surface M2 which is the inner surface.
  • an image is formed at a point ORf on the retina R of the eyeball through the rotation point RC of the eyeball.
  • the light beam LN passing through the near reference point corresponding to the line of sight of the wearer passes through the near reference point ON1 on the lens surface M1 that is the outer surface and the near reference point ON2 on the lens surface M2 that is the inner surface.
  • An image is formed at a point ORn on the retina R of the eyeball through the rotation point RC of the eyeball.
  • the lens surface M1 that is an outer surface is used as a reference surface
  • the lens surface M2 that is an inner surface is described as a correction surface formed in an aspherical shape in order to correct the optical performance of transmitted light.
  • the light beam L corresponding to the line of sight of the wearer hardly enters the lens surface perpendicularly except for the light beam passing through the vicinity of the optical axis OA of the lens, and the position where the light beam enters the lens surface is the position of the lens.
  • the incident angle on the lens surface tends to increase. In other words, various aberrations are caused by light rays passing through the periphery of the lens surface.
  • the distance reference point OF1 and the near reference point ON1 on the lens surface M1 and the distance reference point OF2 and the near reference point ON2 on the lens surface M2 are usually lens surfaces through which the optical axis OA of the lens passes.
  • the positions are set apart from the optical center OG1 on M1 and the optical center OG2 on the lens surface M2. That is, the light beam LF and the light beam LN do not enter the lens surface perpendicularly, and aberration occurs even in light beams passing through the distance reference point and the near reference point.
  • the lens surface M1 which is the outer surface
  • the lens surface M2 which is the inner surface
  • the distance power specified by the prescription value is S.
  • the astigmatic power specified by the prescription value is C (S)
  • the addition power specified by the prescription value is add (S)
  • the surface addition power of the reference surface M1, which is the difference between the surface average refractive power and the surface average refractive power at the distance reference point OF1 of the reference surface M1 is ADDb (S)
  • the surface of the correction surface M2 at the near reference point ON2 is the astigmatism included in the progressive power lens series, where ADDc (S) is the addition power of the correction surface M2, which is the difference between the average refractive power and the surface average refractive power at the distance reference point OF1 of the correction surface M2.
  • the value of ADDc (S) varies depending on the distance power S according to the set condition, and takes a maximum value at a predetermined distance power Sp.
  • the Sp value when taking the maximum value ADDc (Sp) is exactly one when the distance power S continuously changes, but the distance power S as in a normal progressive-power lens. Is set at a fixed interval and takes a discrete value, the value of Sp may be two. In such a case, out of the two Sps, assuming that the greater distance power is Sph and the smaller distance power is Sp1, the above conditional expression (9) is satisfied when Sph ⁇ Sl, It is desirable that the progressive addition lens LS be formed so as to satisfy the conditional expression (10) when Spl ⁇ Sh.
  • conditional expression (15) is further satisfied within the range indicated by the expression (13).
  • the lens surface M1 which is the outer surface
  • the lens surface M2 which is the inner surface
  • the distance power specified by the prescription value is S.
  • the astigmatic power specified by the prescription value is C (S)
  • the addition power specified by the prescription value is add (S)
  • the surface addition power of the reference surface M1, which is the difference between the surface average refractive power and the surface average refractive power at the distance reference point OF1 of the reference surface M1 is ADDb (S)
  • the addition power of the correction surface M2, which is the difference between the average refractive power and the surface average refractive power at the distance reference point OF2 of the correction surface M2, is ADDc (S).
  • a first progressive-power lens whose power is the first distance power S1;
  • the second progressive power lens Sh having the second distance power Sh larger than the distance power S1 is selected, the astigmatism power C (Sl), the add power add (Sl), and the reference in the first progressive power lens
  • C (Sh) C (Sl)
  • add (Sh) add (Sl)
  • ADDb (Sh) ADDb (Sl)
  • 0 ⁇ Sl it is preferable that the following conditional expression (18) is satisfied.
  • conditional expression (19) is further satisfied within the range indicated by the expression (18). Furthermore, it is preferable that the following conditional expression (20) is satisfied.
  • conditional expression (21) is further satisfied within the range indicated by the expression (20).
  • the astigmatic power C specified by the prescription value is equal between the first progressive power lens and the second progressive power lens among the plurality of progressive power lenses LS.
  • the addition add specified by the prescription value is equal and the surface addition ADDb of the reference surface is equal
  • the surface addition ADDc of each correction surface decreases as the distance power S increases.
  • Sp ⁇ Sh the surface addition ADDc of each correction surface is set to decrease as the distance power S decreases.
  • the astigmatism power C specified by the prescription value is equal between the first progressive power lens and the second progressive power lens among the plurality of progressive power lenses, and the prescription value
  • the specified addition add is equal and the surface addition ADDb of the reference surface is equal
  • the surface addition ADDc of the correction surface is set to decrease as the distance power S increases. It was.
  • the outer surface M1 of the outer surface M1 and the inner surface M2 is the reference surface and the inner surface M2 is the correction surface.
  • the present invention is not limited to this.
  • the inner surface M2 is the reference surface
  • the outer surface M1 is The conditional expressions (9) to (21) can be applied even with the configuration of the correction surface.
  • Example 14 of the present invention will be described with reference to Table 2.
  • Table 2 shows the distance power designated by the prescription value for the first progressive-power lens, the surface addition ADDc (Sl) on the correction surface, and the distance-use designated by the prescription value for the second progressive-power lens.
  • the power Sh, the surface addition ADDc (Sh) on the correction surface, the surface addition ADDc (Sh) on the correction surface of the second progressive-power lens, and the surface addition ADDc (Sl) on the correction surface of the first progressive-power lens Is divided by the difference between the distance power Sh specified by the prescription value for the second progressive power lens and the distance power Sl specified by the prescription value for the first progressive power lens (ADDc ( Sh) -ADDc (Sl)) / (Sh-Sl), wearing addition ADD (Sl) of the first progressive addition lens, and wearing addition ADD (Sh) of the second progressive addition lens are shown.
  • the progressive-power lens series according to Example 14 has five progressive-power lenses with a distance power of 5.00, 4.00, 3.00, 2.00, and 1.00.
  • the progressive-power lens series according to Example 14 has a refractive index n of 1.67, an astigmatism power C of 0.00, and a distance reference point on the reference surface M1.
  • the surface average refractive power at OF is PFb 6.27, prescription addition add 2.00, and surface addition ADDb at the reference plane is 2.50.
  • the surface average refractive power PFb at the distance reference point of the reference surface was set to the same value as 6.27. Also, the astigmatic power specified by the prescription value is 0.00, the addition power specified by the prescription value is 2.00, and the surface addition power at the reference plane is 2.50, which is the same value among the five lenses. did.
  • the distance between the surface addition on the correction surface of the second progressive-power lens and the surface addition on the correction surface of the first progressive-power lens is the distance specified by the prescription value for the second progressive-power lens.
  • the value (ADDc (Sh) ⁇ ADDc (Sl)) / (Sh ⁇ Sl) divided by the difference between the power Sh and the distance power S1 designated by the prescription value for the first progressive-power lens is the above (1 ) In the case of (2), -0.07 in the case of (2), -0.04 in the case of (3), and in the case of (4) above. -0.03.
  • Example 15 Next, Example 15 will be described with reference to Table 3.
  • Table 3 is the same as Table 2 above, but the distance power S1 specified by the prescription value for the first progressive-power lens, the surface addition ADDc (Sl) on the correction surface, and the prescription value for the second progressive-power lens Distance addition power Sh specified by the above, surface addition ADDc (Sh) on the correction surface, surface addition ADDc (Sh) on the correction surface of the second progressive power lens and surface addition on the correction surface of the first progressive power lens
  • the difference from the power ADDc (Sl) is the difference between the distance power Sh specified by the prescription value for the second progressive power lens and the distance power Sl specified by the prescription value for the first progressive power lens.
  • the progressive-power lens series according to Example 15 has five progressive-power lenses having a distance power of 4.00, 3.00, 2.00, 1.00, and 0.00.
  • the progressive-power lens series according to Example 15 has a refractive index n of 1.67, and has a surface average refractive power of the reference surface M1 at the distance reference point OF1.
  • the PFb is 4.39
  • the astigmatic power C specified in the prescription is 0.00
  • the prescription addition add is 3.50
  • the surface addition ADDb on the reference plane is 4.00.
  • the relationship between the two progressive-power lenses when the lens is a first progressive-power lens (Sl 0.00) is shown.
  • the surface average refractive power PFb at the distance reference point of the reference surface was set to the same value as 4.39.
  • the astigmatic power specified by the prescription value is 0.00
  • the addition power specified by the prescription value is 3.50
  • the surface addition power at the reference plane is 4.00, which is the same value among the five lenses. did.
  • the distance between the surface addition on the correction surface of the second progressive-power lens and the surface addition on the correction surface of the first progressive-power lens is the distance specified by the prescription value for the second progressive-power lens.
  • the value (ADDc (Sh) ⁇ ADDc (Sl)) / (Sh ⁇ Sl) divided by the difference between the power Sh and the distance power S1 designated by the prescription value for the first progressive-power lens is the above (1 ) In the case of (2), -0.08 in the case of (2), -0.07 in the case of (3), and in the case of (4) above. -0.04.
  • Example 16 Next, Example 16 will be described with reference to Table 4.
  • Table 4 is the same as Table 2 and Table 3 above, regarding the distance diopter S1 specified by the prescription value for the first progressive addition lens, the surface addition ADDc (S1) on the correction surface, and the second progressive addition lens.
  • the distance dioptric power Sh specified by the prescription value, the surface addition ADDc (Sh) on the correction surface, the surface addition ADDc (Sh) on the correction surface of the second progressive addition lens, and the correction surface of the first progressive addition lens The difference between the surface addition power ADDc (Sl) at the distance and the distance power Sh designated by the prescription value for the second progressive power lens and the distance power Sl designated by the prescription value for the first progressive power lens (ADDc (Sh) ⁇ ADDc (Sl)) / (Sh ⁇ Sl) divided by the difference between the first progressive addition lens ADD (Sl) and second addition ADD lens addition ADD (Sh) It is.
  • the progressive addition lens series according to Example 16 has a distance power of 0.00, -1.00, -2.00, -3.00, -4.00, -5.00, -6.00, It has 10 progressive power lenses of ⁇ 7.00, ⁇ 8.00, and ⁇ 9.00.
  • the progressive-power lens series according to Example 16 has a refractive index n of 1.67, and a surface average refractive power at the distance reference point OF1 of the reference surface M1.
  • PFb is 2.51
  • astigmatism power C specified by prescription is 0.00
  • prescription addition add is 0.75
  • surface addition ADDb at the reference plane is 1.50.
  • -0.86 for a progressive power lens with a distance power of 0.00 -0.84 for a progressive power lens with a distance power of -1.00
  • -0.84 for a progressive power lens with a power of -2.00 -0.86 for a progressive power lens with a power of -3.00
  • a progressive power of -4.00 for a distance power -0.89 for lenses -0.94 for progressive-power lenses with a distance power of -5.00, -1.00 for progressive-power lenses with a distance power of -6.00, distance use -1.08 for a progressive power lens with a power of -7.00, -1.17 for a progressive power lens with a power of -8.00, and a progressive power of -9.00 for a distance power
  • the lens was set to -1.28.
  • the distance between the surface addition on the correction surface of the second progressive-power lens and the surface addition on the correction surface of the first progressive-power lens is the distance specified by the prescription value for the second progressive-power lens.
  • the value (ADDc (Sh) ⁇ ADDc (Sl)) / (Sh ⁇ Sl) divided by the difference between the power Sh and the distance power S1 designated by the prescription value for the first progressive-power lens is the above (1 ) In the case of (2) above, 0.02 in the case of (3) above, 0.02 in the case of (4) above. 03, 0.05 in the case of (5), 0.06 in the case of (6), 0.08 in the case of (7), and (8) In the case of (9), it was 0.09, and in the case of (9), it was 0.11.
  • the distance power Sp when the surface addition ADDc (S) of the correction surface M2 takes the maximum value was ⁇ 1.00 and ⁇ 2.00.
  • the maximum value ADDc (Sp) of the addition of the correction surface M2 was ⁇ 0.84.
  • the difference (PFb ⁇ Sp) between the surface average refractive power of the reference surface M1 at the distance reference point OF1 and PFb and the distance power Sp was 3.51 and 4.51.
  • Example 17 Next, Example 17 will be described with reference to Table 5.
  • Table 5 shows the distance power S1 specified by the prescription value for the first progressive-power lens, the surface addition ADDc (Sl) on the correction surface, and the second progressive-power lens, as in Tables 2 to 4 above.
  • the distance dioptric power Sh specified by the prescription value, the surface addition ADDc (Sh) on the correction surface, the surface addition ADDc (Sh) on the correction surface of the second progressive addition lens, and the correction surface of the first progressive addition lens The difference between the surface addition power ADDc (Sl) at the distance and the distance power Sh designated by the prescription value for the second progressive power lens and the distance power Sl designated by the prescription value for the first progressive power lens (ADDc (Sh) ⁇ ADDc (Sl)) / (Sh ⁇ Sl) divided by the difference between the first progressive addition lens ADD (Sl) and second addition ADD lens addition ADD (Sh) respectively To have.
  • the progressive-power lens series according to Example 17 has a distance power of -2.00, -3.00, -4.00, -5.00, -6.00
  • the progressive-power lens series according to Example 17 has a refractive index n of 1.67, and has a surface average refractive power of the reference surface M1 at the distance reference point OF1.
  • PFb is 1.25
  • prescription-specified astigmatism power C is 0.00
  • prescription addition power add is 2.00
  • surface addition power ADDb at the reference plane is 2.50.
  • the distance between the surface addition on the correction surface of the second progressive-power lens and the surface addition on the correction surface of the first progressive-power lens is the distance specified by the prescription value for the second progressive-power lens.
  • the value (ADDc (Sh) ⁇ ADDc (Sl)) / (Sh ⁇ Sl) divided by the difference between the power Sh and the distance power S1 designated by the prescription value for the first progressive-power lens is the above (1 ) In the case of (2) above, 0.01 in the case of (3) above, 0.03 in the case of (4) above. 04, 0.06 in the case of (5), 0.07 in the case of (6), 0.09 in the case of (7), and (8) In this case, it was 0.10.
  • the distance dioptric power Sp when the surface addition ADDc (S) of the correction surface M2 takes the maximum value was ⁇ 3.00.
  • the maximum value ADDc (Sp) of the addition of the correction surface M2 was ⁇ 0.69.
  • the difference (PFb ⁇ Sp) between the surface average refractive power of the reference surface M1 at the distance reference point OF1 and the distance power Sp (PFb ⁇ Sp) was 4.25.

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Abstract

Une optimisation des propriétés optiques de rayons de lumière de transmission est réalisée en tenant compte de l'ordonnance d'un porteur, des conditions d'utilisation et autres, de sorte que la somme de la puissance d'addition de surface (ADDb) (S, C, add) au niveau d'une surface de référence et de la puissance d'addition de surface (ADDc) (S, C, add) au niveau d'une surface de correction peut être inférieure à la puissance d'addition (add) spécifiée par l'ordonnance. Il est par conséquent possible de rendre la puissance pour vision de loin et la puissance d'addition, qui constituent des spécifications importantes pour une lentille à puissance progressive, égales à la valeur spécifiée par la valeur de l'ordonnance et d'améliorer les propriétés optiques des rayons de lumière de transmission de manière à les rapprocher des propriétés optiques cibles de la lentille à puissance progressive.
PCT/JP2009/005371 2008-10-14 2009-10-14 Lentille à puissance progressive et série de lentilles à puissance progressive Ceased WO2010044266A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2008-265631 2008-10-14
JP2008265631A JP5135159B2 (ja) 2008-10-14 2008-10-14 累進屈折力レンズシリーズ
JP2008265630A JP5135158B2 (ja) 2008-10-14 2008-10-14 累進屈折力レンズ、累進屈折力レンズシリーズ及び累進屈折力レンズの製造方法
JP2008-265630 2008-10-14

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WO2010044266A1 true WO2010044266A1 (fr) 2010-04-22

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PCT/JP2009/005371 Ceased WO2010044266A1 (fr) 2008-10-14 2009-10-14 Lentille à puissance progressive et série de lentilles à puissance progressive

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109923467A (zh) * 2016-10-31 2019-06-21 株式会社尼康依视路 渐进屈光力镜片对、渐进屈光力镜片对的设计方法及渐进屈光力镜片对的制造方法

Citations (4)

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Publication number Priority date Publication date Assignee Title
WO1997019383A1 (fr) * 1995-11-24 1997-05-29 Seiko Epson Corporation Lentilles multifocales pour lunettes et verre de lunettes
JP2006350381A (ja) * 2003-11-27 2006-12-28 Hoya Corp 両面非球面型累進屈折力レンズおよびその設計方法
WO2008010504A1 (fr) * 2006-07-20 2008-01-24 Nikon-Essilor Co., Ltd. Procédé de conception d'un verre à réfraction progressive, procédé de fabrication de ce verre, et système fournissant un verre de lunettes
JP2008116510A (ja) * 2006-10-31 2008-05-22 Hoya Corp 累進屈折力眼鏡レンズ用セミフィニッシュレンズ及び累進屈折力眼鏡レンズ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019383A1 (fr) * 1995-11-24 1997-05-29 Seiko Epson Corporation Lentilles multifocales pour lunettes et verre de lunettes
JP2006350381A (ja) * 2003-11-27 2006-12-28 Hoya Corp 両面非球面型累進屈折力レンズおよびその設計方法
WO2008010504A1 (fr) * 2006-07-20 2008-01-24 Nikon-Essilor Co., Ltd. Procédé de conception d'un verre à réfraction progressive, procédé de fabrication de ce verre, et système fournissant un verre de lunettes
JP2008116510A (ja) * 2006-10-31 2008-05-22 Hoya Corp 累進屈折力眼鏡レンズ用セミフィニッシュレンズ及び累進屈折力眼鏡レンズ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109923467A (zh) * 2016-10-31 2019-06-21 株式会社尼康依视路 渐进屈光力镜片对、渐进屈光力镜片对的设计方法及渐进屈光力镜片对的制造方法
CN112882253A (zh) * 2016-10-31 2021-06-01 株式会社尼康依视路 渐进屈光力镜片对的设计方法及制造方法

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