WO2024117101A1 - Polarizing lens - Google Patents

Polarizing lens Download PDF

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WO2024117101A1
WO2024117101A1 PCT/JP2023/042449 JP2023042449W WO2024117101A1 WO 2024117101 A1 WO2024117101 A1 WO 2024117101A1 JP 2023042449 W JP2023042449 W JP 2023042449W WO 2024117101 A1 WO2024117101 A1 WO 2024117101A1
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region
lens
degree
along
curvature
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PCT/JP2023/042449
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French (fr)
Japanese (ja)
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能拓 安田
隆二 渡辺
浩一 安田
和也 高島
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株式会社ウインテック
能拓 安田
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Publication of WO2024117101A1 publication Critical patent/WO2024117101A1/en

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  • This disclosure relates to polarized lenses used, for example, in sunglasses, goggles, etc.
  • sunglasses 100 include a pair of lens balls 101 and a frame 102 into which the pair of lens balls 101 are attached.
  • Frame 102 has a pair of lens frames 103 into which lens balls 101 are fitted.
  • Lens balls 101 are manufactured by cutting a polarized lens to fit the shape of lens frames 103.
  • Polarized lenses are manufactured, for example, by bending a horizontally elongated laminate in which polycarbonate support plates are laminated on both sides of a polarizing film.
  • the frame 102 is designed with a width greater than a height to be fashionable, and the lens frame 103 is curved significantly in the left-right direction to accommodate light incident not only from the front but also from the side. Therefore, the lens ball 101 must also be curved significantly to match the curvature of the lens frame 103.
  • a spherically curved polarized lens is known in which the degree of curvature along the horizontal axis and the degree of curvature along the vertical axis (the direction perpendicular to the polarization axis) are both set to 8R.
  • a curvature of "1R” means that the focal length is 1m and the refractive power is 1.00, and if the polarized lens is made of glass, the radius of curvature is 523mm.
  • the value that represents the magnitude of this curvature is inversely proportional to the radius of curvature, so the smaller the value, the gentler the curve, and the larger the value, the steeper the curve.
  • a spherically curved lens ball 101 in which the degree of curvature along the horizontal axis and the vertical axis are both set to 6R, and the lens frame 103 of the frame 102 in which this lens ball 101 can be attached has reduced curvature along the left-right direction.
  • a polarized lens that is highly curved into an 8R x 8R spherical shape has a large difference between the degree of curvature of the convex surface on the front side and the concave surface on the back side.
  • This increases the refractive power of light, so if lenses made from this polarized lens are used in sunglasses, it can have a detrimental effect on the eyes, affecting vision and causing eye fatigue.
  • Reducing the thickness of the polarized lens can reduce the refractive power of light, but this also reduces the strength of the lens.
  • Reducing the degree of curvature of the polarized lens can also reduce the refractive power of light, but this also makes the curvature of the lens more gentle, making it difficult to fit the lens into a frame with a highly curved lens frame.
  • the present disclosure aims to address the above-mentioned issues and provide polarized lenses for producing lenses that have low optical refractive power and can be attached to existing frames.
  • a polarized lens that reduces the refractive power of light at least in the area of the polarized lens where the user's pupil hits, suppresses adverse effects on the eyes, and can be fitted to frames that are compatible with existing spherically curved polarized lenses, by adjusting the degree of curvature along the horizontal axis and the degree of curvature along the vertical axis in the assumed eye point area that exists inward from the center of the lens along the horizontal axis according to the refractive index of the polarized lens material and the thickness of the polarized lens, while taking the degree of curvature of a spherically curved polarized lens as a base.
  • the polarized lenses disclosed herein are directed to the polarized lenses described in Section 1 below.
  • a polarized lens for single-eye use that is curved so that the front side is convex and the back side is concave, the degree of curvature along the horizontal axis and the vertical axis of at least the eye point region in a region inside the lens center, which is the intersection of the horizontal axis and the vertical axis, is smaller than the degree of curvature along the horizontal axis and the vertical axis of a region outside the lens center, the assumed eyepoint region is a virtual region that can be obtained by moving a virtual circle having a diameter of 20 mm in the inner region so that the center of the virtual circle reaches a position that is a first distance d1 away from the lens center in the horizontal axis direction to a position that is a second distance d2 away from the lens center, the first distance D1 being 8 mm or more and 11 mm or less, and the second distance D2 being 18 mm or more and 21 mm or less, A polarizing lens in which the spherical power of the assumed
  • the polarized lenses disclosed herein also include the polarized lenses described in Item 2 below as preferred embodiments of the polarized lenses described in Item 1 above.
  • the outer region is divided along the direction of the horizontal axis into a central region on the lens center side and a side region on the outer edge side of the polarizing lens, Item 2.
  • the polarized lens according to item 1 wherein the degree of curvature of the central region along the direction of the horizontal axis is smaller than the degree of curvature of the side regions along the direction of the horizontal axis.
  • the polarized lenses of the present disclosure also include the polarized lenses described in the following item 3 as preferred embodiments of the polarized lenses described in items 1 and 2 above.
  • the inner region is divided into an inner first region, an inner second region, and an inner third region from the horizontal axis toward the upper edge and the lower edge of the polarizing lens, the degree of bending along the longitudinal axis direction increases in the order of the inner first region, the inner second region, and the inner third region; Item 3.
  • the polarized lenses of the present disclosure also include the polarized lenses described in the following item 4 as preferred embodiments of the polarized lenses described in the above item 3.
  • Item 4 The polarized lens according to item 3, in which the degree of curvature of the first inner region along the vertical axis and the degree of curvature of the inner region along the horizontal axis are equal.
  • the polarized lenses disclosed herein also include the polarized lenses described in Item 5 below as preferred embodiments of the polarized lenses described in Item 2 above.
  • the central region is divided into a central first region and a central second region from the horizontal axis toward the upper edge and the lower edge of the polarizing lens, 3.
  • the polarized lens according to item 2 wherein the degree of curvature of the central second region along the direction of the vertical axis is greater than the degree of curvature of the central first region along the direction of the vertical axis.
  • the polarized lenses of the present disclosure also include the polarized lenses described in the following item 6 as preferred embodiments of the polarized lenses described in items 2 and 5 above.
  • Item 6 A polarized lens according to item 2 or 5, in which the degree of curvature of the side region along the horizontal axis and the degree of curvature of the side region along the vertical axis are equal.
  • the polarized lenses of the present disclosure also include the polarized lenses described in the following item 7 as preferred embodiments of the polarized lenses described in items 1 to 6 above.
  • Item 7 The polarizing lens according to any one of items 1 to 7, in which the astigmatism power of the assumed eyepoint area is 0.12 or less.
  • the polarized lenses of the present disclosure also include the polarized lenses described in the following item 8 as preferred embodiments of the polarized lenses described in items 1 to 7 above.
  • the polarizing lens according to any one of items 1 to 7,
  • the polarizing lens is composed of a laminate in which polycarbonate support plates are laminated on both sides of a polarizing film,
  • the thickness of the polarized lens is 0.9 mm
  • the curvature degree of the curved surface along the horizontal axis direction of the eyepoint assumed area and the curvature degree of the curved surface along the vertical axis direction are 6R or less
  • a polarized lens wherein the degree of curvature of the curved surface of the side region in the outer region along the horizontal axis and the degree of curvature of the curved surface along the vertical axis are 8R.
  • the polarized lenses of the present disclosure also include the polarized lenses described in the following item 9 as preferred embodiments of the polarized lenses described in items 1 to 7 above.
  • the polarizing lens according to any one of items 1 to 7,
  • the polarizing lens is composed of a laminate in which polycarbonate support plates are laminated on both sides of a polarizing film,
  • the thickness of the polarized lens is 1.5 mm
  • the curvature degree of the curved surface along the horizontal axis direction of the eyepoint assumed area and the curvature degree of the curved surface along the vertical axis direction are 5R or less
  • a polarized lens wherein the degree of curvature of the curved surface in the outer region along the horizontal axis of the side region and the degree of curvature of the curved surface in the vertical axis direction are 6R.
  • the polarized lens of the present disclosure maintains the degree of curvature of a spherically curved polarized lens at least in the outer region, while making the degree of curvature along the horizontal axis and the degree of curvature along the vertical axis in the inner region, where the eyepoint is expected to hit the user's pupil, smaller than in the outer region, to set the spherical power of the eyepoint expected region to between -0.12 and +0.12. This reduces the refractive power of light in the eyepoint expected region, so the polarized lens of the present disclosure can suppress adverse effects on the eyes and can be attached to frames that are compatible with existing spherically curved polarized lenses.
  • FIG. 1 is a perspective view of a polarizing lens.
  • FIG. 2 is a front view of a polarizing lens.
  • FIG. 3 is a perspective view of the laminate.
  • FIG. 4 is a vertical cross-sectional view of a portion of a polarizing lens.
  • FIG. 5(A) is a cross-sectional view of a polarizing lens
  • FIG. 5(B) is a vertical cross-sectional view of the inner region of the polarizing lens
  • FIG. 5(C) is a vertical cross-sectional view of the central region of the outer region of the polarizing lens.
  • FIG. 6 is a diagram for explaining an assumed eye point area.
  • FIG. 7 is a diagram illustrating a spectacle frame.
  • FIG. 8 is a perspective view of sunglasses.
  • the polarized lenses disclosed herein are used, for example, in sunglasses and goggles.
  • sunglasses and goggles One embodiment of the polarized lenses disclosed herein is described below with reference to the attached drawings.
  • FIGS. 1 and 2 show the appearance of polarizing lens 1.
  • Polarizing lens 1 is for monocular use.
  • the horizontal axis X of polarizing lens 1 is set in the direction of the polarization axis, and the vertical axis Y is set in a direction perpendicular to the polarization axis.
  • the intersection of horizontal axis X and vertical axis Y is the lens center C of polarizing lens 1.
  • the polarized lens 1 is formed by bending the laminate 11, which is elongated in the direction of the horizontal axis X shown in FIG. 3, multiple times while heating it.
  • the laminate 11 is subjected to a first bending process to form an intermediate product having a smaller degree of bending along the horizontal axis X and along the vertical axis Y than the final product, and then the intermediate product is subjected to a second bending process to make the degree of bending along the horizontal axis X and along the vertical axis Y greater than that of the intermediate product and the same as that of the final product, thereby manufacturing the polarized lens 1.
  • the bending process can be performed by a conventionally known method.
  • the outer shape of the laminate 11 is a horizontally elongated rectangular shape, but it does not necessarily have to be rectangular and may be, for example, elliptical.
  • the polarizing lens 1 and laminate 11 are structured by laminating support plates 13 on both sides of a polarizing film 12.
  • the thickness of the polarizing lens 1 and laminate 11 is not particularly limited, but is, for example, 0.9 mm or more and 1.5 mm or less.
  • the thickness of the polarizing lens 1 and laminate 11 can be measured, for example, using a film thickness meter or vernier calipers.
  • the polarizing film 12 is not particularly limited, but may be, for example, a dichroic dye oriented on a polymer film such as polyvinyl alcohol.
  • the thickness of the polarizing film 12 is not particularly limited, but may be, for example, 0.02 mm or more and 0.04 mm or less.
  • the support plate 13 is not particularly limited, but may be, for example, made of glass, polycarbonate (PC), acrylic resin (PMMA), polyamide resin (PA), triacetate, etc.
  • polarizing lens 1 is curved so that the front surface is convex 10A and the back surface is concave 10B.
  • polarizing lens 1 is curved so as to describe a smooth curve along the horizontal axis X in a cross-sectional view perpendicular to the vertical axis Y
  • polarizing lens 1 is curved so as to describe a smooth curve along the vertical axis Y in a cross-sectional view perpendicular to the horizontal axis X.
  • Polarizing lens 1 is curved in an aspheric shape, and the convex surface 10A on the front side and the concave surface 10B on the back side of polarizing lens 1 are aspheric.
  • the dashed dotted line indicates the outer shape of the lens ball formed by cutting away the outer periphery of the polarized lens 1 to fit a lens frame in, for example, a sunglasses frame.
  • the outer periphery of the polarized lens 1 is the portion having a predetermined width from the upper, lower, inner and outer edges of the polarized lens 1 toward the lens center C.
  • FIG. 1 shows a polarized lens for the left eye, with the right side of FIG. 1 corresponding to the temple side of the frame (the side closest to the user's ear) and the left side corresponding to the bridge side of the frame (the side closest to the user's nose).
  • the temple side of the polarized lens 1 is referred to as the "outside" and the bridge side as the "inside.”
  • the degree of curvature along the horizontal axis X of the region 2 inside the lens center C i.e., the region 2 from the vertical axis Y to the inner edge of the polarizing lens 1
  • the degree of curvature along the horizontal axis X of the region 3 outside the lens center C i.e., the region 3 from the vertical axis Y to the outer edge of the polarizing lens 1. Therefore, the inner region 2 of the polarizing lens 1 has a gentler curve along the horizontal axis X than the outer region 3.
  • the width of the inner region (length along the horizontal axis X) and the width of the outer region (length along the horizontal axis X) are approximately equal.
  • the dashed line indicates a state in which the polarizing lens 1 is curved along the horizontal axis X up to the inner region 2 with a degree of curvature along the horizontal axis X of the side region 31 in the outer region 3.
  • the degree of curvature along the horizontal axis X is preferably a constant value throughout the entire region, but does not necessarily have to be a constant value throughout the entire region.
  • a portion of the inner edge side of the polarized lens 1, or a portion of the upper edge side and/or lower edge side of the polarized lens 1 may have a steeper or gentler curve along the horizontal axis X than other portions.
  • the degree of curvature along the direction of the horizontal axis X preferably changes so as to increase from the lens center C toward the outer edge of the polarized lens 1.
  • the outer region 3 is divided into two regions: a central region 30 on the lens center C side, and a lateral region 31 on the outer edge side of the polarized lens 1.
  • the degree of curvature of the central region 30 along the direction of the horizontal axis X is smaller than the degree of curvature of the lateral region 31 along the direction of the horizontal axis X. Therefore, in the outer region 3, the central region 30 curves more gently along the direction of the horizontal axis X than the lateral region 31.
  • the degree of curvature of the polarized lens 1 along the horizontal axis X is preferably greatest in the side regions 31 of the outer region 3, next greatest in the central region 30 of the outer region 3, and least in the inner region 2. Therefore, the degree of curvature of the polarized lens 1 along the horizontal axis X varies so as to decrease from the outer edge of the polarized lens 1 to the lens center C and the inner edge of the polarized lens 1, and the curve along the horizontal axis X from the outer side to the inner side becomes gradually gentler.
  • the degree of curvature along the horizontal axis X is preferably a constant value throughout each region, but does not necessarily have to be a constant value throughout each region.
  • the curve along the horizontal axis X may be steeper or gentler for a portion of the upper edge and/or lower edge of the polarized lens 1 than for other portions.
  • the curve along the horizontal axis X may be steeper or gentler for a portion of the outer edge of the polarized lens 1 than for other portions.
  • the degree of curvature along the vertical axis Y preferably changes so as to increase from the horizontal axis X toward the upper and lower edges of the polarized lens 1.
  • the inner region 2 is divided into three regions, the inner first region 20, the inner second region 21, and the inner third region 22, from the horizontal axis X toward the upper and lower edges of the polarized lens 1.
  • the degree of curvature along the vertical axis Y increases in the order of the inner first region 20, the inner second region 21, and the inner third region 22.
  • the curve along the vertical axis Y is the gentlest in the inner first region 20
  • the curve along the vertical axis Y is steeper in the inner second region 21 than in the inner first region 20
  • the curve along the vertical axis Y is the steepest in the inner third region 22.
  • the vertical width (length along the vertical axis Y) of the first inner region 20, the vertical width (length along the vertical axis Y) of the second inner region 21, and the vertical width (length along the vertical axis Y) of the third inner region 22 are not particularly limited, but are generally equal.
  • the degree of bending along the direction of the vertical axis Y is preferably a constant value throughout each region, but does not necessarily have to be a constant value throughout the entire region.
  • the degree of curvature of the central region 30 along the vertical axis Y preferably changes so as to increase from the horizontal axis X toward the upper and lower edges of the polarized lens 1.
  • the central region 30 is divided into two regions, a central first region 300 and a central second region 301, from the horizontal axis X toward the upper and lower edges of the polarized lens 1.
  • the degree of curvature along the vertical axis Y increases in the order of the central first region 300 and the central second region 301. Therefore, in the central region 30, the curve along the vertical axis Y is steeper in the central second region 301 than in the central first region 30.
  • the vertical width (length along the vertical axis Y) of the central first region 300 and the vertical width (length along the vertical axis Y) of the central second region 301 are not particularly limited, but are generally equal.
  • the degree of bending along the direction of the vertical axis Y is preferably a constant value throughout each region, but does not necessarily have to be a constant value throughout the region.
  • the degree of bending along the direction of the vertical axis Y of the side region 31 is preferably a constant value throughout the entire region, but does not necessarily have to be a constant value throughout the entire region.
  • the degree of bending of the polarized lens 1 along the direction of the vertical axis Y is greatest in the lateral regions 31 of the outer region 3, and is preferably also greatest in the central second region 301 in the central region 30 of the outer region 3 and the inner third region 22 of the inner region 2.
  • the degree of bending of the polarized lens 1 along the direction of the vertical axis Y is preferably next greatest in the central first region 300 in the central region 30 of the outer region 3 and the inner second region 21 of the inner region 2.
  • the degree of bending of the polarized lens 1 along the direction of the vertical axis Y is preferably smallest in the inner first region 20 of the inner region 2.
  • the relationship between the degree of curvature along the horizontal axis X of the polarized lens 1 and the degree of curvature along the vertical axis Y is preferably such that the largest degrees of curvature are approximately equal in value, the next largest degrees of curvature are approximately equal in value, and the smallest degrees of curvature are approximately equal in value.
  • the degree of curvature along the horizontal axis X and the degree of curvature along the vertical axis Y are approximately equal, and the lateral regions 30 are highly curved and spherically curved.
  • the degree of curvature along the horizontal axis X and the degree of curvature along the vertical axis Y are approximately equal, and the central first region 300 is moderately curved and spherically curved.
  • the degree of curvature along the horizontal axis X and the degree of curvature along the vertical axis Y are approximately equal, and the central first region 20 is curved spherically with a small curve.
  • the inner region 2 includes an assumed eyepoint region 4, as shown in Figures 1 and 2.
  • the assumed eyepoint region 4 is a virtual region where it is assumed that the user's pupil will hit when the lens is attached to the frame.
  • the assumed eyepoint region 4 is set with reference to the fact that the distance between a person's left and right eyes is generally 32 mm.
  • a virtual circle 5 having a diameter of 20 mm is moved so that the center of the virtual circle 5 reaches a position from a position away from the lens center C in the direction of the horizontal axis X from a position away from the lens center C by a first distance D1 to a position away from the lens center C by a second distance D2.
  • the virtual region traced by the virtual circle 5 is the assumed eyepoint region 4.
  • the first distance D1 is 8 mm or more and 11 mm or less, preferably 9 mm or more and 11 mm or less, and most preferably 10 mm.
  • the second distance D2 is 18 mm or more and 21 mm or less.
  • the first distance D1 and the second distance D2 can be measured using a computer lens meter CL-2000 manufactured by Topcon Corporation.
  • the expected eyepoint region 4 is preferably included in the first inner region 20 of the inner region 2.
  • the expected eyepoint region 4 is included in the region of the polarized lens 1 where the degree of bending along the horizontal axis X and the degree of bending along the vertical axis Y are the smallest.
  • the spherical power is -0.12 or more and +0.12 or less, and preferably -0.09 or more and +0.09 or less.
  • the spherical power is expressed as (d1 + d2)/2, where d1 is the power of the refractive power of light caused by the difference in magnitude between the degree of curvature along the horizontal axis X of the convex surface on the front side of the polarizing lens 1 and the degree of curvature along the horizontal axis X of the concave surface on the back side, and d2 is the power of the refractive power of light caused by the difference in magnitude between the degree of curvature along the vertical axis Y of the convex surface on the front side of the polarizing lens 1 and the degree of curvature along the vertical axis Y of the concave surface on the back side.
  • a value of -0.12 or more and +0.12 or less is the pass standard, and the closer to zero the s
  • the spherical power mentioned above is determined mainly by the refractive index of the material (support plate 13) of polarizing lens 1, the thickness of polarizing lens 1, the degree of curvature (radius of curvature) of convex surface 10A on the front side of polarizing lens 1, and the degree of curvature (radius of curvature) of concave surface 10B on the back side of polarizing lens 1.
  • the refractive index of the material (support plate 13) of polarizing lens 1 the thickness of polarizing lens 1
  • the degree of curvature (radius of curvature) of convex surface 10A on the front side of polarizing lens 1 the degree of curvature (radius of curvature) of concave surface 10B on the back side of polarizing lens 1.
  • the spherical power of the assumed eyepoint area 4 is calculated based on these factors.
  • a polarizing lens 1 can be made using a 0.9 mm thick laminate 11 in which polycarbonate support plates 13 are laminated on both sides of a polarizing film 12, and the degree of curvature of the expected eyepoint area 4 along the horizontal axis X and along the vertical axis Y are both 6R or less.
  • the degree of curvature refers to the degree of curvature of the convex surface 10A on the front side of the polarizing lens 1.
  • polarized lens 1 can be designed with the degree of curvature shown in Example 1-2 in Table 1 below.
  • Polarized lens 1 having the degree of curvature shown in Example 1-2 can also be attached to existing frames that fit polarized lenses curved into a spherical shape of 8R x 8R, because the side regions 31 of the outer region 3 are curved into a spherical shape of 8R x 8R.
  • a polarizing lens 1 constructed using a 1.5 mm thick laminate 11 in which polycarbonate support plates 13 are laminated on both sides of a polarizing film 12, and in which the degree of curvature of the expected eyepoint area 4 along the horizontal axis X and along the vertical axis Y are both 5R or less.
  • the degree of curvature refers to the degree of curvature of the convex surface 10A on the front side of the polarizing lens 1.
  • polarized lens 1 can be designed with the degree of curvature shown in Example 3-4 of Table 2 below.
  • Polarized lens 1 having the degree of curvature shown in Example 3-4 has a 6R x 6R spherically curved side region of the outer region, and therefore can be attached to existing frames that fit 6R x 6R spherically curved polarized lenses.
  • the refractive index of polycarbonate (PC) is approximately 1.583, which is greater than the refractive index of glass (approximately 1.523), acrylic resin (PMMA) (approximately 1.492), and polyamide resin (PA) (approximately 1.530). Therefore, if polarized lens 1 is designed with the degree of curvature shown in Example 1-4 above, it is easy to recognize that the spherical power of the expected eyepoint area 4 can be made between -0.12 and +0.12 even if the material of the support plate 13 is not polycarbonate but, for example, glass, acrylic resin, polyamide resin, polyvinyl alcohol, etc.
  • the spherical power can be measured using measuring equipment conforming to ISO standards, such as a telescope, eyepiece, and measurement chart, with the polarizing lens 1 tilted horizontally and vertically, assuming that a lens ball made from the polarizing lens 1 is attached to a frame.
  • the telescope can be, for example, a LiNOS reading telescope (focusing range 1200 mm to infinity, axial observation, 1.2x magnification without eyepiece), the eyepiece can be, for example, a LiNOS eyepiece (10x magnification), and the measurement chart can be, for example, a 4.4 mm Power & Prism Chart.
  • the measurement chart can also be displayed on a computer using, for example, an ELECOM UVC WEB camera (maximum pixel count 1600 x 1200 pixels).
  • the astigmatism power is preferably 0.12 or less.
  • the astigmatism power represents the difference in refractive power between d1 and d2,
  • a smaller value of the astigmatism power is preferable, as it means that the distortion is smaller. Small lens distortion can prevent adverse effects on the user's eyes.
  • the astigmatism power can be calculated from the formula
  • the degree of curvature of at least the side regions 31 of the outer region 3 is maintained at the same level as that of a spherically curved polarized lens, for example 8R x 8R or 6R x 6R, while the degree of curvature along the horizontal axis X and along the vertical axis Y in the eyepoint assumed region 4 in the inner region 2, where the user's pupil is assumed to be, is made smaller than that of the outer region 3, and the spherical power of the eyepoint assumed region 4 is set to -0.12 or more and +0.12 or less, preferably -0.09 or more and +0.09 or less. This reduces the refractive power of light in the eyepoint assumed region 4, so that the polarized lens 1 of this embodiment can suppress adverse effects on the eyes and can be attached to frames that are compatible with existing spherically curved polarized lenses.
  • a spherically curved polarized lens for example 8R x 8R or 6R x 6R
  • the outer region 3 is divided along the horizontal axis X into a central region 30 on the lens center C side and a side region 31 on the outer edge side of the polarized lens 1, and the degree of curvature along the horizontal axis X of the central region 30 is smaller than the degree of curvature along the horizontal axis X of the side region 31. Therefore, according to the polarized lens 1 of this embodiment, the degree of curvature along the horizontal axis X changes so as to become smaller in stages from the outer edge of the polarized lens 1 to the lens center C to the inner edge of the polarized lens 1, and the curve along the horizontal axis X from the outside to the inside becomes gradually gentler. This allows the polarized lens 1 to be curved smoothly along the horizontal axis X.
  • the inner region 2 is divided into an inner first region 20, an inner second region 21, and an inner third region 22 from the horizontal axis X toward the upper and lower edges of the polarized lens 1, respectively, with the degree of curvature along the vertical axis Y increasing in the order of the inner first region 20, the inner second region 21, and the inner third region 22.
  • the central region 30 in the outer region 3 is divided into a central first region 300 and a central second region 301 from the horizontal axis X toward the upper and lower edges of the polarized lens 1, respectively, with the degree of curvature along the vertical axis Y of the central second region 301 being greater than the degree of curvature along the vertical axis Y of the central first region 300. Therefore, according to the polarized lens 1 of this embodiment, the degree of curvature along the vertical axis Y of the polarized lens 1 changes so as to become gradually smaller from the largest lateral region 31 of the outer region 3 to the smallest inner first region 20 of the inner region 2, with the curve along the vertical axis Y gradually becoming gentler. This allows the polarizing lens 1 to be smoothly curved along the direction of the vertical axis Y.
  • the astigmatism power in the assumed eyepoint region 4 is 0.12 or less. Therefore, with the polarized lens 1 of this embodiment, lens distortion is small, making it possible to suppress adverse effects on the user's eyes.
  • the polarized lens of the present disclosure is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present disclosure.
  • the polarized lens of Example 1 is a 0.9 mm thick laminated plate, in which a 0.4 mm thick polycarbonate support plate is laminated on both sides of a polarizing film, and curved into an aspheric shape by bending.
  • the size of the polarized lens is 80 mm in the horizontal axis direction and 60 mm in the vertical axis direction. As shown in FIG. 2, the polarized lens is divided into an inner region and an outer region with the center of the lens as the boundary.
  • the inner region is also divided into an inner third region, an inner second region, an inner first region, an inner second region, and an inner third region along the vertical axis between the upper edge and the lower edge of the polarized lens, and the lengths of the respective regions in the vertical axis direction are 10 mm, 10 mm, 20 mm, 10 mm, and 10 mm.
  • the outer region is divided into a central region and a side region, and the lengths of the respective regions in the horizontal axis direction are 20 mm and 20 mm.
  • the central region is divided into a central second region, a central first region, and a central second region between the upper edge and the lower edge along the vertical axis, and the lengths of these regions along the vertical axis are 20 mm, 20 mm, and 20 mm, respectively.
  • the eyepoint assumed region is a virtual region in the inner region that is created by moving a virtual circle with a diameter of 20 mm so that the center of the virtual circle reaches a position 10 mm away from the center of the lens in the horizontal axis direction to a position 21 mm away, and is included in the inner first region.
  • Example 1 Each region of the polarized lens in Example 1 has the degree of curvature shown in Example 1 of Table 1 above.
  • the polarized lens of Example 2 is a 1.5 mm thick laminated plate, in which a 0.7 mm thick polycarbonate support plate is laminated on both sides of a polarizing film, and is curved into an aspheric shape by bending.
  • the size of the polarized lens is 80 mm in the horizontal axis direction and 60 mm in the vertical axis direction. As shown in FIG. 2, the polarized lens is divided into an inner region and an outer region with the center of the lens as the boundary.
  • the inner region is also divided into an inner third region, an inner second region, an inner first region, an inner second region, and an inner third region along the vertical axis between the upper edge and the lower edge of the polarized lens, and the lengths of the respective regions in the vertical axis direction are 10 mm, 10 mm, 20 mm, 10 mm, and 10 mm.
  • the outer region is divided into a central region and a side region, and the lengths of the respective regions in the horizontal axis direction are 20 mm and 20 mm.
  • the central region is divided into a central second region, a central first region, and a central second region between the upper edge and the lower edge along the vertical axis, and the lengths of these regions along the vertical axis are 20 mm, 20 mm, and 20 mm, respectively.
  • the eyepoint assumption region is a virtual region in the inner region that is created by moving a virtual circle with a diameter of 20 mm so that the center of the virtual circle reaches a position 10 mm away from the center of the lens in the horizontal axis direction to a position 18 mm away, and is included in the inner first region.
  • Each region of the polarized lens of Example 2 has the degree of curvature shown in Example 3 of Table 2 above.
  • the polarized lens of Example 3 is a 1.1 mm thick laminated plate, in which a 0.5 mm thick polycarbonate support plate is laminated on both sides of a polarizing film, and curved into an aspheric shape by bending.
  • the size of the polarized lens is 80 mm in the horizontal axis direction and 60 mm in the vertical axis direction. As shown in FIG. 2, the polarized lens is divided into an inner region and an outer region with the center of the lens as the boundary.
  • the inner region is also divided into an inner third region, an inner second region, an inner first region, an inner second region, and an inner third region along the vertical axis between the upper edge and the lower edge of the polarized lens, and the lengths of the respective regions in the vertical axis direction are 10 mm, 10 mm, 20 mm, 10 mm, and 10 mm.
  • the outer region is divided into a central region and a side region, and the lengths of the respective regions in the horizontal axis direction are 20 mm and 20 mm.
  • the central region is divided into a central second region, a central first region, and a central second region between the upper edge and the lower edge along the vertical axis, and the lengths of these regions along the vertical axis are 20 mm, 20 mm, and 20 mm, respectively.
  • the eyepoint assumed region is a virtual region in the inner region that is created by moving a virtual circle with a diameter of 20 mm so that the center of the virtual circle reaches a position 10 mm away from the center of the lens in the horizontal axis direction to a position 21 mm away, and is included in the inner first region.
  • Each region of the polarized lens of Example 3 has the degree of curvature shown in Example 1 of Table 1 above.
  • the polarized lens of Comparative Example 1 is made by bending a 0.9 mm thick laminated plate, with 0.4 mm thick polycarbonate support plates laminated on both sides of a polarizing film, into a spherical shape with a curvature of 8R along both the horizontal and vertical axes.
  • the size of the polarized lens is 80 mm in the horizontal direction and 60 mm in the vertical direction.
  • the polarized lens of Comparative Example 2 is made by bending a 1.5 mm thick laminated plate, with 0.7 mm thick polycarbonate support plates laminated on both sides of a polarizing film, into a spherical shape with a curvature of 6R along both the horizontal and vertical axes.
  • the size of the polarized lens is 80 mm in length along the horizontal axis and 60 mm in length along the vertical axis.
  • the polarized lens of Comparative Example 3 is made by bending a 1.1 mm thick laminate with a 0.5 mm thick polycarbonate support plate laminated on both sides of a polarizing film into a spherical shape with a curvature of 8R along both the horizontal and vertical axes.
  • the size of the polarized lens is 80 mm in the horizontal direction and 60 mm in the vertical direction.
  • the spherical power and astigmatism power were measured using measuring equipment conforming to ISO standards at a position 10 mm inward from the center of the lens along the horizontal axis (see P1 in Figure 6(B)) and at a position 21 mm inward from the center of the lens along the horizontal axis (see P2 in Figure 6(B)).
  • the spherical power and astigmatism power were measured using measuring equipment conforming to ISO standards at a position 10 mm inward from the center of the lens along the horizontal axis (see P1 in Figure 6(B)) and at a position 18 mm inward from the center of the lens along the horizontal axis (see P2 in Figure 6(B)).
  • the spherical power and astigmatism power were measured using a measuring device conforming to ISO standards at a position 10 mm inward from the center of the lens along the horizontal axis (see P1 in Figure 6(B)) and at a position 21 mm inward from the center of the lens along the horizontal axis (see P2 in Figure 6(B)).
  • Tables 4 to 6 show that the aspherically curved polarized lenses of Examples 1-3 of the present disclosure have a spherical power in the expected eyepoint area that is within the range of ⁇ 0.12 and meets the ISO standard passing criteria, whereas the simply spherically curved polarized lenses of Comparative Examples 1-3 have a spherical power in the expected eyepoint area that is outside the range of ⁇ 0.12 and cannot meet the ISO standard passing criteria.
  • the aspherically curved polarized lenses of Examples 1-3 of the present disclosure have spherical powers at the lens center within the range of ⁇ 0.12, which meets the ISO standard passing criteria, whereas the simply spherically curved polarized lenses of Comparative Examples 1-3 have spherical powers at the lens center outside the range of ⁇ 0.12, which is confirmed to be unable to meet the ISO standard passing criteria.
  • the polarized lens was actually cut to the shape of the rim of the eyeglass frame and attached to the rim, and the spherical power and astigmatism power at the eye point position of the eyeglass frame were measured using measuring equipment conforming to ISO standards.
  • the polarized lens is a 1.1 mm thick laminated plate, with 0.5 mm thick polycarbonate support plates laminated on both sides of the polarizing film, which is then bent into an aspheric shape by bending.
  • the size of the polarized lens is 80 mm in the horizontal direction and 60 mm in the vertical direction. As shown in Figure 2, the polarized lens is divided into an inner region and an outer region, with the center of the lens as the boundary.
  • the inner region is also divided into an inner third region, an inner second region, an inner first region, an inner second region, and an inner third region along the vertical axis between the upper and lower edges of the polarized lens, with the lengths of the respective regions along the vertical axis being 10 mm, 10 mm, 20 mm, 10 mm, and 10 mm.
  • the outer region is divided into a central region and a side region, with the lengths of the respective regions along the horizontal axis being 20 mm and 20 mm.
  • the central region is divided into a central second region, a central first region, and a central second region between the upper edge and the lower edge along the vertical axis, and the lengths of these regions along the vertical axis are 20 mm, 20 mm, and 20 mm, respectively.
  • the eyepoint assumed region is a virtual region in the inner region that is created by moving a virtual circle with a diameter of 20 mm so that the center of the virtual circle reaches a position 10 mm away from the center of the lens in the horizontal axis direction to a position 21 mm away, and is included in the inner first region.
  • the spherical power and astigmatism power of the polarized lens before it is attached to the rim of the eyeglass frame are as shown in Table 8 below, and the spherical power in the expected eyepoint area (a position 8 mm to 21 mm inward from the center of the lens) is within the range of ⁇ 0.12.
  • the polarized lens was edge-cut so that the lens center coincided with the center of the rim of the eyeglass frame and matched the shape of the rim, and after cutting, it was attached to the rim of the eyeglass frame.
  • the eyeglass frame used was the eyeglass frame of Example 4-9 below, which has a general shape and size.
  • the eye point of the eyeglass frame is located 32 mm outward from the center of the bridge, assuming a human interpupillary distance of 64 mm.
  • Example 4 (Oakley eyeglass frame) ⁇ Bridge width: 20mm - Rim width: 60mm Temple inclination: 5° forward inclination Rim inclination: Front inclination 16° Horizontal inclination 25° - Rim curve: approx. 7R Eye point position: 8 mm inward from the center of the rim (center of the lens) (2)
  • Example 5 (Carrera eyeglass frame) ⁇ Bridge width: 20mm - Rim width: 62mm Temple inclination: forward inclination 8° Rim inclination: Front inclination 16° Horizontal inclination 25° - Rim curve: approx.
  • Example 8 (eyeglass frame manufactured by CLEAR LAKE) Bridge width: 22mm - Rim width: 62mm Temple inclination: forward inclination 7° Rim inclination: Front inclination 18° Horizontal inclination 26° - Rim curve: approx. 7R Eye point position: 10 mm inward from the center of the rim (center of the lens) (6)
  • Example 9 (Timberland eyeglass frame) Bridge width: 21mm - Rim width: 59mm Temple inclination: forward inclination 1° Rim inclination: Front inclination 16° Horizontal inclination 26° - Rim curve: approx. 7R Eye point position: 8 mm inward from the center of the rim (center of the lens)
  • the expected eyepoint area for a polarized lens is within a range of 8mm to 21mm inward from the center of the lens, when the polarized lens is cut to fit the shape of the rim of a typical eyeglass frame of a typical shape and size and attached to the rim, the actual eyepoint of the eyeglass frame coincides with the expected eyepoint area, and the spherical power at the eyepoint position is within a range of ⁇ 0.12, clearing the ISO standard passing criteria. It can therefore be seen that the polarized lens of the present invention can suppress adverse effects on the eyes.

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Abstract

The purpose of the present invention is to provide a polarizing lens for manufacturing a lens that has small light refractive power and can be mounted to existing frames. The degree of curve along the direction of a horizontal axis X and the degree of curve along the direction of a vertical axis Y of at least an eye point region 4 in an inner region 2 inside a lens center C are smaller than the degree of curve along the direction of the horizontal axis X and the degree of curve along the direction of the vertical axis Y of an outer region 3 outside the lens center C. An eye point-assumed region 4 is a virtual region that can be formed by moving a virtual circle with a diameter of 20 mm in the inner region 2 such that the center of the virtual circle reaches a position at a second distance d2 from a position at a first distance d1 from the lens center C in the direction of the horizontal axis X, the first distance D1 is 8-11 mm, the second distance D2 is 18-21 mm, and the spherical power of the eye point-assumed region 4 is -0.12 to +0.12.

Description

偏光レンズPolarised lenses
　本開示は、例えばサングラス、ゴーグルなどに用いられる偏光レンズに関する。 This disclosure relates to polarized lenses used, for example, in sunglasses, goggles, etc.
　例えば図８に示すように、サングラス１００は、一対のレンズ玉１０１と、一対のレンズ玉１０１が装着されるフレーム１０２と、を備える。フレーム１０２は、レンズ玉１０１が嵌め込まれる一対のレンズ枠１０３を有する。レンズ玉１０１は、偏光レンズをレンズ枠１０３の形状に合わせてカットすることにより製作される。偏光レンズは、例えば偏光膜の両面にポリカーボネート製の支持板が積層された横長形状の積層板に曲げ加工を施すことにより製作される。 For example, as shown in FIG. 8, sunglasses 100 include a pair of lens balls 101 and a frame 102 into which the pair of lens balls 101 are attached. Frame 102 has a pair of lens frames 103 into which lens balls 101 are fitted. Lens balls 101 are manufactured by cutting a polarized lens to fit the shape of lens frames 103. Polarized lenses are manufactured, for example, by bending a horizontally elongated laminate in which polycarbonate support plates are laminated on both sides of a polarizing film.
　フレーム１０２は、ファッション性を考慮して、横の幅が縦の幅よりも長いデザインになっており、機能的には、正面からの入射光のみならず、側方からの入射光にも対応できるように、レンズ枠１０３が左右方向に沿って大きく湾曲している。そのため、レンズ玉１０１もレンズ枠１０３の湾曲に合わせて大きく湾曲させる必要がある。大きく湾曲したレンズ玉１０１を製作するため、例えば横軸方向に沿う曲がり度合及び縦軸方向（偏光軸に直交する方向）に沿う曲がり度合がいずれも８Ｒに設定された球面状に湾曲する偏光レンズが知られている。 The frame 102 is designed with a width greater than a height to be fashionable, and the lens frame 103 is curved significantly in the left-right direction to accommodate light incident not only from the front but also from the side. Therefore, the lens ball 101 must also be curved significantly to match the curvature of the lens frame 103. To produce a lens ball 101 that is curved significantly, for example, a spherically curved polarized lens is known in which the degree of curvature along the horizontal axis and the degree of curvature along the vertical axis (the direction perpendicular to the polarization axis) are both set to 8R.
　ここで、曲がり度合が「１Ｒ」とは、焦点距離が１ｍ、屈折力が１．００となることを意味し、偏光レンズがガラス製であると、曲率半径が５２３ｍｍである。この曲がり度合の大きさを表す数値は曲率半径に反比例するため、前記数値が小さくなる程、緩やかなカーブとなり、前記数値が大きくなる程、急峻なカーブとなる。 Here, a curvature of "1R" means that the focal length is 1m and the refractive power is 1.00, and if the polarized lens is made of glass, the radius of curvature is 523mm. The value that represents the magnitude of this curvature is inversely proportional to the radius of curvature, so the smaller the value, the gentler the curve, and the larger the value, the steeper the curve.
　また、横軸方向に沿う曲がり度合及び縦軸方向に沿う曲がり度合がいずれも６Ｒに設定された球面状に湾曲するレンズ玉１０１も知られており、このレンズ玉１０１を装着可能なフレーム１０２のレンズ枠１０３は左右方向に沿う湾曲が抑えられている。 Also, a spherically curved lens ball 101 is known in which the degree of curvature along the horizontal axis and the vertical axis are both set to 6R, and the lens frame 103 of the frame 102 in which this lens ball 101 can be attached has reduced curvature along the left-right direction.
　例えば８Ｒ×８Ｒの球面状に大きく湾曲する偏光レンズは、表側の凸面の曲がり度合と裏側の凹面の曲がり度合との間に大きな差が生じる。これにより、光の屈折力が大きくなるために、この偏光レンズから製作されるレンズ玉をサングラスなどに用いると、視力に影響を与えたり眼の疲労などが生じ、眼に悪影響を及ぼす。偏光レンズの厚みを薄くすると、光の屈折力を低減できるが、それではレンズ玉の強度が低下する。また、偏光レンズの曲がり度合を小さくすると、光の屈折力は低減できるが、それではレンズ玉の湾曲も緩やかになるため、大きく湾曲したレンズ枠を有するフレームにレンズ玉を装着するのが困難となる。 For example, a polarized lens that is highly curved into an 8R x 8R spherical shape has a large difference between the degree of curvature of the convex surface on the front side and the concave surface on the back side. This increases the refractive power of light, so if lenses made from this polarized lens are used in sunglasses, it can have a detrimental effect on the eyes, affecting vision and causing eye fatigue. Reducing the thickness of the polarized lens can reduce the refractive power of light, but this also reduces the strength of the lens. Reducing the degree of curvature of the polarized lens can also reduce the refractive power of light, but this also makes the curvature of the lens more gentle, making it difficult to fit the lens into a frame with a highly curved lens frame.
　また、６Ｒ×６Ｒの球面状に湾曲する偏光レンズについては、サングラスの見た目を向上させるためにレンズ玉の厚みを厚くすることが要望されている。しかし、偏光レンズを分厚くすると、光の屈折力が大きくなるために、この偏光レンズから製作されるレンズ玉をサングラスなどに用いると、同様に眼に悪影響を及ぼす。偏光レンズの曲がり度合を小さくすると、光の屈折力は低減できるが、それではレンズ玉の湾曲も緩やかになるため、既存のフレームにレンズ玉を装着するのが困難となる。 Furthermore, for 6R x 6R spherically curved polarized lenses, there is a demand to make the lenses thicker to improve the appearance of sunglasses. However, making the polarized lens thicker increases the refractive power of light, and so using lenses made from these polarized lenses in sunglasses, etc., also has a negative effect on the eyes. Reducing the degree of curvature of the polarized lens reduces the refractive power of light, but this also makes the curvature of the lens more gentle, making it difficult to fit the lens into existing frames.
　本開示は、上記課題に着目して、光の屈折力が小さくかつ既存のフレームにも装着可能なレンズ玉を製作するための偏光レンズの提供を目的とする。 The present disclosure aims to address the above-mentioned issues and provide polarized lenses for producing lenses that have low optical refractive power and can be attached to existing frames.
　上記課題を解決するため、本発明者は、球面状に湾曲した偏光レンズの曲がり度合をベースにしながら、レンズ中心から横軸方向に沿って内側に存在するアイポイント想定領域における横軸の方向に沿う曲がり度合及び縦軸の方向に沿う曲がり度合を、偏光レンズの素材の屈折率、偏光レンズの厚みに応じて調整することで、偏光レンズにおいて少なくともユーザの瞳孔が当たる領域の光の屈折力を低減して眼に対する悪影響を抑制し、かつ、既存の球面状に湾曲した偏光レンズに適合したフレームにも装着できる偏光レンズを見出した。 To solve the above problems, the inventor has discovered a polarized lens that reduces the refractive power of light at least in the area of the polarized lens where the user's pupil hits, suppresses adverse effects on the eyes, and can be fitted to frames that are compatible with existing spherically curved polarized lenses, by adjusting the degree of curvature along the horizontal axis and the degree of curvature along the vertical axis in the assumed eye point area that exists inward from the center of the lens along the horizontal axis according to the refractive index of the polarized lens material and the thickness of the polarized lens, while taking the degree of curvature of a spherically curved polarized lens as a base.
　そのため、本開示の偏光レンズは、以下の項１に記載の偏光レンズを主題とする。 Therefore, the polarized lenses disclosed herein are directed to the polarized lenses described in Section 1 below.
項１．表側が凸面、裏側が凹面となるよう湾曲する単眼用の偏光レンズであって、
　横軸と縦軸との交点であるレンズ中心よりも内側領域における少なくともアイポイント領域の前記横軸の方向に沿う曲がり度合及び前記縦軸の方向に沿う曲がり度合が、前記レンズ中心よりも外側領域の前記横軸の方向に沿う曲がり度合及び前記縦軸の方向に沿う曲がり度合より小さく、
　前記アイポイント想定領域は、前記内側領域において、直径２０ｍｍの仮想円を、該仮想円の中心が前記レンズ中心から前記横軸の方向に第一距離ｄ１離れた位置から第二距離ｄ２離れた位置まで到達するよう前記仮想円を移動させることでできる仮想領域であり、　前記第一距離Ｄ１は８ｍｍ以上１１ｍｍ以下であり、前記第二距離Ｄ２は１８ｍｍ以上２１ｍｍ以下であり、
　前記アイポイント想定領域の球面度数が－０．１２以上＋０．１２以下である、偏光レンズ。 Item 1. A polarized lens for single-eye use that is curved so that the front side is convex and the back side is concave,
the degree of curvature along the horizontal axis and the vertical axis of at least the eye point region in a region inside the lens center, which is the intersection of the horizontal axis and the vertical axis, is smaller than the degree of curvature along the horizontal axis and the vertical axis of a region outside the lens center,
the assumed eyepoint region is a virtual region that can be obtained by moving a virtual circle having a diameter of 20 mm in the inner region so that the center of the virtual circle reaches a position that is a first distance d1 away from the lens center in the horizontal axis direction to a position that is a second distance d2 away from the lens center, the first distance D1 being 8 mm or more and 11 mm or less, and the second distance D2 being 18 mm or more and 21 mm or less,
A polarizing lens in which the spherical power of the assumed eye point area is −0.12 or more and +0.12 or less.
　また、本開示の偏光レンズは、上記項１に記載の偏光レンズの好ましい態様として、以下の項２に記載の偏光レンズを包含する。 The polarized lenses disclosed herein also include the polarized lenses described in Item 2 below as preferred embodiments of the polarized lenses described in Item 1 above.
項２．前記外側領域は、前記横軸の方向に沿って、前記レンズ中心側の中央領域及び該偏光レンズの外縁側の側方領域に分けられており、
　前記中央領域の前記横軸の方向に沿う曲がり度合は、前記側方領域の前記横軸の方向に沿う曲がり度合より小さい、項１に記載の偏光レンズ。 Item 2. The outer region is divided along the direction of the horizontal axis into a central region on the lens center side and a side region on the outer edge side of the polarizing lens,
Item 2. The polarized lens according to item 1, wherein the degree of curvature of the central region along the direction of the horizontal axis is smaller than the degree of curvature of the side regions along the direction of the horizontal axis.
　また、本開示の偏光レンズは、上記項１及び項２に記載の偏光レンズの好ましい態様として、以下の項３に記載の偏光レンズを包含する。 The polarized lenses of the present disclosure also include the polarized lenses described in the following item 3 as preferred embodiments of the polarized lenses described in items 1 and 2 above.
項３．前記内側領域は、前記横軸から該偏光レンズの上縁及び下縁のそれぞれの方に向かって、内側第一領域、内側第二領域及び内側第三領域に分かれており、
　前記内側第一領域、前記内側第二領域及び前記内側第三領域の順で前記縦軸の方向に沿う曲がり度合が大きく、
　前記内側第一領域に前記アイポイント想定領域が含まれる、項１又は項２に記載の偏光レンズ。 Item 3. The inner region is divided into an inner first region, an inner second region, and an inner third region from the horizontal axis toward the upper edge and the lower edge of the polarizing lens,
the degree of bending along the longitudinal axis direction increases in the order of the inner first region, the inner second region, and the inner third region;
Item 3. The polarized lens according to item 1 or 2, wherein the inner first region includes the eye point assumed region.
　また、本開示の偏光レンズは、上記項３に記載の偏光レンズの好ましい態様として、以下の項４に記載の偏光レンズを包含する。 The polarized lenses of the present disclosure also include the polarized lenses described in the following item 4 as preferred embodiments of the polarized lenses described in the above item 3.
項４．前記内側第一領域の前記縦軸の方向に沿う曲がり度合と、前記内側領域の前記横軸の方向に沿う曲がり度合とが等しい値である、項３に記載の偏光レンズ。 Item 4. The polarized lens according to item 3, in which the degree of curvature of the first inner region along the vertical axis and the degree of curvature of the inner region along the horizontal axis are equal.
　また、本開示の偏光レンズは、上記項２に記載の偏光レンズの好ましい態様として、以下の項５に記載の偏光レンズを包含する。 The polarized lenses disclosed herein also include the polarized lenses described in Item 5 below as preferred embodiments of the polarized lenses described in Item 2 above.
項５．前記中央領域は、前記横軸から該偏光レンズの上縁及び下縁のそれぞれの方に向かって、中央第一領域及び中央第二領域に分けられており、
　前記中央第二領域の前記縦軸の方向に沿う曲がり度合は、前記中央第一領域の前記縦軸の方向に沿う曲がり度合より大きい、項２に記載の偏光レンズ。 Item 5. The central region is divided into a central first region and a central second region from the horizontal axis toward the upper edge and the lower edge of the polarizing lens,
3. The polarized lens according to item 2, wherein the degree of curvature of the central second region along the direction of the vertical axis is greater than the degree of curvature of the central first region along the direction of the vertical axis.
　また、本開示の偏光レンズは、上記項２及び５に記載の偏光レンズの好ましい態様として、以下の項６に記載の偏光レンズを包含する。 The polarized lenses of the present disclosure also include the polarized lenses described in the following item 6 as preferred embodiments of the polarized lenses described in items 2 and 5 above.
項６．前記側方領域の前記横軸の方向に沿う曲がり度合と、前記側方領域の前記縦軸の方向に沿う曲がり度合とが等しい値である、項２又は５に記載の偏光レンズ。 Item 6. A polarized lens according to item 2 or 5, in which the degree of curvature of the side region along the horizontal axis and the degree of curvature of the side region along the vertical axis are equal.
　また、本開示の偏光レンズは、上記項１から６に記載の偏光レンズの好ましい態様として、以下の項７に記載の偏光レンズを包含する。 The polarized lenses of the present disclosure also include the polarized lenses described in the following item 7 as preferred embodiments of the polarized lenses described in items 1 to 6 above.
項７．前記アイポイント想定領域の非点収差度数が０．１２以下である、項１から７のいずれか一項に記載の偏光レンズ。 Item 7. The polarizing lens according to any one of items 1 to 7, in which the astigmatism power of the assumed eyepoint area is 0.12 or less.
　また、本開示の偏光レンズは、上記項１から７に記載の偏光レンズの好ましい態様として、以下の項８に記載の偏光レンズを包含する。 The polarized lenses of the present disclosure also include the polarized lenses described in the following item 8 as preferred embodiments of the polarized lenses described in items 1 to 7 above.
項８．項１から７のいずれか一項に記載の偏光レンズであって、
　該偏光レンズは、偏光膜の両面にポリカーボネート製の支持板が積層された積層板により構成されており、
　該偏光レンズの厚みが０．９ｍｍであり、
　前記アイポント想定領域の前記横軸の方向に沿う曲面の曲がり度合及び前記縦軸の方向に沿う曲面の曲がり度合が６Ｒ以下であり、
　前記外側領域における前記側方領域の前記横軸の方向に沿う曲面の曲がり度合及び前記縦軸の方向に沿う曲面の曲がり度合が８Ｒである、偏光レンズ。 Item 8. The polarizing lens according to any one of items 1 to 7,
The polarizing lens is composed of a laminate in which polycarbonate support plates are laminated on both sides of a polarizing film,
The thickness of the polarized lens is 0.9 mm,
The curvature degree of the curved surface along the horizontal axis direction of the eyepoint assumed area and the curvature degree of the curved surface along the vertical axis direction are 6R or less,
A polarized lens, wherein the degree of curvature of the curved surface of the side region in the outer region along the horizontal axis and the degree of curvature of the curved surface along the vertical axis are 8R.
　また、本開示の偏光レンズは、上記項１から７に記載の偏光レンズの好ましい態様として、以下の項９に記載の偏光レンズを包含する。 The polarized lenses of the present disclosure also include the polarized lenses described in the following item 9 as preferred embodiments of the polarized lenses described in items 1 to 7 above.
項９．項１から７のいずれか一項に記載の偏光レンズであって、
　該偏光レンズは、偏光膜の両面にポリカーボネート製の支持板が積層された積層板により構成されており、
　該偏光レンズの厚みが１．５ｍｍであり、
　前記アイポント想定領域の前記横軸の方向に沿う曲面の曲がり度合及び前記縦軸の方向に沿う曲面の曲がり度合が５Ｒ以下であり、
　前記外側領域における前記側方領域の前記横軸の方向に沿う曲面の曲がり度合及び前記縦軸の方向に沿う曲面の曲がり度合が６Ｒである、偏光レンズ。 Item 9. The polarizing lens according to any one of items 1 to 7,
The polarizing lens is composed of a laminate in which polycarbonate support plates are laminated on both sides of a polarizing film,
The thickness of the polarized lens is 1.5 mm,
The curvature degree of the curved surface along the horizontal axis direction of the eyepoint assumed area and the curvature degree of the curved surface along the vertical axis direction are 5R or less,
A polarized lens, wherein the degree of curvature of the curved surface in the outer region along the horizontal axis of the side region and the degree of curvature of the curved surface in the vertical axis direction are 6R.
　本開示の偏光レンズでは、少なくとも外側領域の曲がり度合について球面状に湾曲した偏光レンズの曲がり度合を維持しつつ、内側領域の中でユーザの瞳孔が当たると想定されるアイポイント想定領域における横軸の方向に沿う曲がり度合及び縦軸の方向に沿う曲がり度合を外側領域よりも小さくして、アイポイント想定領域の球面度数を－０．１２以上＋０．１２以下としている。これにより、アイポイント想定領域における光の屈折力を低減することができるため、本開示の偏光レンズによれば、眼に対する悪影響を抑制することができ、かつ、既存の球面状に湾曲した偏光レンズに適合したフレームにも装着できる。 The polarized lens of the present disclosure maintains the degree of curvature of a spherically curved polarized lens at least in the outer region, while making the degree of curvature along the horizontal axis and the degree of curvature along the vertical axis in the inner region, where the eyepoint is expected to hit the user's pupil, smaller than in the outer region, to set the spherical power of the eyepoint expected region to between -0.12 and +0.12. This reduces the refractive power of light in the eyepoint expected region, so the polarized lens of the present disclosure can suppress adverse effects on the eyes and can be attached to frames that are compatible with existing spherically curved polarized lenses.
図１は偏光レンズの斜視図であるFIG. 1 is a perspective view of a polarizing lens. 図２は偏光レンズの正面図である。FIG. 2 is a front view of a polarizing lens. 図３は積層板の斜視図である。FIG. 3 is a perspective view of the laminate. 図４は偏光レンズの一部分の縦断面図である。FIG. 4 is a vertical cross-sectional view of a portion of a polarizing lens. 図５（Ａ）は偏光レンズの横断面図であり、図５（Ｂ）は偏光レンズの内側領域における縦断面図であり、図５（Ｃ）は偏光レンズの外側領域の中央領域における縦断面図である。FIG. 5(A) is a cross-sectional view of a polarizing lens, FIG. 5(B) is a vertical cross-sectional view of the inner region of the polarizing lens, and FIG. 5(C) is a vertical cross-sectional view of the central region of the outer region of the polarizing lens. 図６はアイポイント想定領域を説明する図である。FIG. 6 is a diagram for explaining an assumed eye point area. 図７は眼鏡フレームを説明する図である。FIG. 7 is a diagram illustrating a spectacle frame. 図８はサングラスの斜視図である。FIG. 8 is a perspective view of sunglasses.
　本開示の偏光レンズは、例えばサングラス、ゴーグルなどに用いられる。以下、本開示の偏光レンズの一実施形態について、添付図面を参照して説明する。 The polarized lenses disclosed herein are used, for example, in sunglasses and goggles. One embodiment of the polarized lenses disclosed herein is described below with reference to the attached drawings.
　図１及び図２は、偏光レンズ１の外観を示す。偏光レンズ１は、単眼用である。偏光レンズ１の横軸Ｘが偏光軸の方向に、縦軸Ｙが偏光軸と直交する方向に、それぞれ設定されている。横軸Ｘと縦軸Ｙとの交点が偏光レンズ１のレンズ中心Ｃである。 FIGS. 1 and 2 show the appearance of polarizing lens 1. Polarizing lens 1 is for monocular use. The horizontal axis X of polarizing lens 1 is set in the direction of the polarization axis, and the vertical axis Y is set in a direction perpendicular to the polarization axis. The intersection of horizontal axis X and vertical axis Y is the lens center C of polarizing lens 1.
　偏光レンズ１は、図３に示す横軸Ｘの方向に長い横長形状の積層板１１を加熱しながら複数回の曲げ加工を施して形成される。例えば、積層板１１に第１次の曲げ加工を施して、横軸Ｘの方向に沿う曲がり度合及び縦軸Ｙ方向に沿う曲がり度合が最終品より小さい曲がり度合を有する中間加工品を成形した後、該中間加工品に第２次の曲げ加工を施して、横軸Ｘの方向に沿う曲がり度合及び縦軸Ｙ方向に沿う曲がり度合を中間加工品より大きく、最終品と同じにすることで、偏光レンズ１を製造することができる。曲げ加工は、従来から公知の方法で行うことができる。積層板１１の外形は、横に長い矩形状であるが、必ずしも矩形状である必要はなく、例えば楕円形状であってもよい。 The polarized lens 1 is formed by bending the laminate 11, which is elongated in the direction of the horizontal axis X shown in FIG. 3, multiple times while heating it. For example, the laminate 11 is subjected to a first bending process to form an intermediate product having a smaller degree of bending along the horizontal axis X and along the vertical axis Y than the final product, and then the intermediate product is subjected to a second bending process to make the degree of bending along the horizontal axis X and along the vertical axis Y greater than that of the intermediate product and the same as that of the final product, thereby manufacturing the polarized lens 1. The bending process can be performed by a conventionally known method. The outer shape of the laminate 11 is a horizontally elongated rectangular shape, but it does not necessarily have to be rectangular and may be, for example, elliptical.
　偏光レンズ１及び積層板１１は、図４に示すように、偏光膜１２の両面にそれぞれ支持板１３を貼り合わせて積層した構造のものである。偏光レンズ１及び積層板１１の厚みは特に限定されないが、例えば０．９ｍｍ以上１．５ｍｍ以下である。偏光レンズ１及び積層板１１の厚みは、例えば膜厚計やノギスなどを用いて測定することができる。 As shown in FIG. 4, the polarizing lens 1 and laminate 11 are structured by laminating support plates 13 on both sides of a polarizing film 12. The thickness of the polarizing lens 1 and laminate 11 is not particularly limited, but is, for example, 0.9 mm or more and 1.5 mm or less. The thickness of the polarizing lens 1 and laminate 11 can be measured, for example, using a film thickness meter or vernier calipers.
　偏光膜１２は特に限定されないが、例えば２色性色素をポリビニルアルコールなどの高分子フィルム上に配向させたものである。偏光膜１２の厚みは特に限定されないが、例えば０．０２ｍｍ以上０．０４ｍｍ以下である。支持板１３は特に限定されないが、例えばガラス、ポリカーボネート（ＰＣ）、アクリル樹脂（ＰＭＭＡ）、ポリアミド樹脂（ＰＡ）、トリアセテートなどにより形成される。 The polarizing film 12 is not particularly limited, but may be, for example, a dichroic dye oriented on a polymer film such as polyvinyl alcohol. The thickness of the polarizing film 12 is not particularly limited, but may be, for example, 0.02 mm or more and 0.04 mm or less. The support plate 13 is not particularly limited, but may be, for example, made of glass, polycarbonate (PC), acrylic resin (PMMA), polyamide resin (PA), triacetate, etc.
　図１及び図５に示すように、偏光レンズ１は、表側の面が凸面１０Ａとなりかつ裏側の面が凹面１０Ｂとなるように湾曲している。偏光レンズ１は、図５（Ａ）に示すように、縦軸Ｙに垂直な断面視において横軸Ｘ方向に沿って滑らかなカーブを描くように湾曲しており、かつ、図５（Ｂ）（Ｃ）に示すように、横軸Ｘに垂直な断面視において縦軸Ｙの方向に沿って滑らかなカーブを描くように湾曲している。偏光レンズ１は、非球面状に湾曲しており、偏光レンズ１の表側の凸面１０Ａ及び裏側の凹面１０Ｂは非球面である。 As shown in Figures 1 and 5, polarizing lens 1 is curved so that the front surface is convex 10A and the back surface is concave 10B. As shown in Figure 5(A), polarizing lens 1 is curved so as to describe a smooth curve along the horizontal axis X in a cross-sectional view perpendicular to the vertical axis Y, and as shown in Figures 5(B) and (C), polarizing lens 1 is curved so as to describe a smooth curve along the vertical axis Y in a cross-sectional view perpendicular to the horizontal axis X. Polarizing lens 1 is curved in an aspheric shape, and the convex surface 10A on the front side and the concave surface 10B on the back side of polarizing lens 1 are aspheric.
　なお、図１において、一点鎖線は、例えばサングラスのフレームにおけるレンズ枠に合わせて偏光レンズ１の外周縁部を削り取ることで形成されるレンズ玉の外形を示している。なお、偏光レンズ１の外周縁部とは、偏光レンズ１の上縁、下縁、内縁及び外縁からレンズ中心Ｃの方に所定の幅を有する部分である。図１は左眼用の偏光レンズが示されており、図１の右側はフレームのテンプル側（ユーザの耳側）に対応し、左側がフレームのブリッジ側（ユーザの鼻側）に対応する。本開示では、偏光レンズ１における前記テンプル側を「外側」、前記ブリッジ側を「内側」という。 In FIG. 1, the dashed dotted line indicates the outer shape of the lens ball formed by cutting away the outer periphery of the polarized lens 1 to fit a lens frame in, for example, a sunglasses frame. The outer periphery of the polarized lens 1 is the portion having a predetermined width from the upper, lower, inner and outer edges of the polarized lens 1 toward the lens center C. FIG. 1 shows a polarized lens for the left eye, with the right side of FIG. 1 corresponding to the temple side of the frame (the side closest to the user's ear) and the left side corresponding to the bridge side of the frame (the side closest to the user's nose). In this disclosure, the temple side of the polarized lens 1 is referred to as the "outside" and the bridge side as the "inside."
　偏光レンズ１は、図５（Ａ）に示すように、レンズ中心Ｃよりも内側領域２つまり縦軸Ｙから偏光レンズ１の内縁までの領域２の横軸Ｘの方向に沿う曲がり度合が、レンズ中心Ｃよりも外側領域３つまり縦軸Ｙから偏光レンズ１の外縁までの領域３の横軸Ｘの方向に沿う曲がり度合より小さい。そのため、偏光レンズ１は、内側領域２の方が外側領域３よりも横軸Ｘの方向に沿うカーブが緩やかである。内側領域の横幅（横軸Ｘに沿う長さ）と外側領域の横幅（横軸Ｘに沿う長さ）は概ね等しい。なお、図５（Ａ）において、一点鎖線は、仮に外側領域３における側方領域３１の横軸Ｘの方向に沿う曲がり度合で内側領域２まで偏光レンズ１が横軸Ｘの方向に沿って湾曲した状態を示す。 As shown in FIG. 5A, the degree of curvature along the horizontal axis X of the region 2 inside the lens center C, i.e., the region 2 from the vertical axis Y to the inner edge of the polarizing lens 1, is smaller than the degree of curvature along the horizontal axis X of the region 3 outside the lens center C, i.e., the region 3 from the vertical axis Y to the outer edge of the polarizing lens 1. Therefore, the inner region 2 of the polarizing lens 1 has a gentler curve along the horizontal axis X than the outer region 3. The width of the inner region (length along the horizontal axis X) and the width of the outer region (length along the horizontal axis X) are approximately equal. In FIG. 5A, the dashed line indicates a state in which the polarizing lens 1 is curved along the horizontal axis X up to the inner region 2 with a degree of curvature along the horizontal axis X of the side region 31 in the outer region 3.
　内側領域２において、横軸Ｘの方向に沿う曲がり度合は、好ましくはその全域において一定な値であるが、必ずしもその全域で一定な値でなくてもよい。例えば、内側領域２において、偏光レンズ１の内縁側の一部分や、偏光レンズ１の上縁側及び／又は下縁側の一部分について他の部分よりも、横軸Ｘの方向に沿うカーブが急であってもよいし緩やかであってもよい。 In the inner region 2, the degree of curvature along the horizontal axis X is preferably a constant value throughout the entire region, but does not necessarily have to be a constant value throughout the entire region. For example, in the inner region 2, a portion of the inner edge side of the polarized lens 1, or a portion of the upper edge side and/or lower edge side of the polarized lens 1 may have a steeper or gentler curve along the horizontal axis X than other portions.
　外側領域３において、横軸Ｘの方向に沿う曲がり度合は、好ましくはレンズ中心Ｃから偏光レンズ１の外端に向けて大きくなるように変化している。例えば、外側領域３は、図２及び図５（Ａ）に示すように、レンズ中心Ｃ側の中央領域３０と偏光レンズ１の外縁側の側方領域３１の二つの領域に分けられている。そして、中央領域３０の横軸Ｘの方向に沿う曲がり度合が、側方領域３１の横軸Ｘの方向に沿う曲がり度合より小さい。そのため、外側領域３は、中央領域３０の方が側方領域３１よりも横軸Ｘの方向に沿う曲がりが緩やかである。 In the outer region 3, the degree of curvature along the direction of the horizontal axis X preferably changes so as to increase from the lens center C toward the outer edge of the polarized lens 1. For example, as shown in Figures 2 and 5(A), the outer region 3 is divided into two regions: a central region 30 on the lens center C side, and a lateral region 31 on the outer edge side of the polarized lens 1. The degree of curvature of the central region 30 along the direction of the horizontal axis X is smaller than the degree of curvature of the lateral region 31 along the direction of the horizontal axis X. Therefore, in the outer region 3, the central region 30 curves more gently along the direction of the horizontal axis X than the lateral region 31.
　つまり、偏光レンズ１の横軸Ｘの方向に沿う曲がり度合は、好ましくは、外側領域３の側方領域３１において最も大きく、外側領域３の中央領域３０において次に大きく、内側領域２において最も小さい。そのため、偏光レンズ１の横軸Ｘの方向に沿う曲がり度合は、偏光レンズ１の外縁からレンズ中心Ｃ、偏光レンズ１の内縁にわたって小さくなるように変化しており、外側から内側にわたって横軸Ｘの方向に沿うカーブが徐々に緩やかになっている。これにより、外側領域３における側方領域３１の横軸Ｘの方向に沿う曲がり度合と、内側領域２の横軸Ｘの方向に沿う曲がり度合との差が大きくても、偏光レンズ１を横軸Ｘの方向に沿って滑らかに湾曲させることができる。 In other words, the degree of curvature of the polarized lens 1 along the horizontal axis X is preferably greatest in the side regions 31 of the outer region 3, next greatest in the central region 30 of the outer region 3, and least in the inner region 2. Therefore, the degree of curvature of the polarized lens 1 along the horizontal axis X varies so as to decrease from the outer edge of the polarized lens 1 to the lens center C and the inner edge of the polarized lens 1, and the curve along the horizontal axis X from the outer side to the inner side becomes gradually gentler. This allows the polarized lens 1 to be curved smoothly along the horizontal axis X, even if there is a large difference between the degree of curvature of the side regions 31 in the outer region 3 along the horizontal axis X and the degree of curvature of the inner region 2 along the horizontal axis X.
　外側領域３の中央領域３０及び側方領域３１において、横軸Ｘの方向に沿う曲がり度合は、好ましくはそれぞれの全域において一定な値であるが、必ずしもそれぞれの全域で一定な値でなくてもよい。例えば、中央領域３０及び側方領域３１において、偏光レンズ１の上縁側及び／又は下縁側の一部分について他の部分よりも、横軸Ｘの方向に沿うカーブが急であってもよいし緩やかであってもよい。また、側方領域３１において、偏光レンズ１の外縁側の一部分について他の部分よりも、横軸Ｘの方向に沿うカーブが急であってもよいし緩やかであってもよい。 In the central region 30 and lateral regions 31 of the outer region 3, the degree of curvature along the horizontal axis X is preferably a constant value throughout each region, but does not necessarily have to be a constant value throughout each region. For example, in the central region 30 and lateral regions 31, the curve along the horizontal axis X may be steeper or gentler for a portion of the upper edge and/or lower edge of the polarized lens 1 than for other portions. Also, in the lateral region 31, the curve along the horizontal axis X may be steeper or gentler for a portion of the outer edge of the polarized lens 1 than for other portions.
　次に、偏光レンズ１の縦軸Ｙの方向に沿う曲がり度合について説明する。 Next, we will explain the degree of curvature along the vertical axis Y of the polarizing lens 1.
　内側領域２において、縦軸Ｙの方向に沿う曲がり度合は、好ましくは横軸Ｘから偏光レンズ１の上縁及び下縁のそれぞれに向けて大きくなるように変化している。例えば、図２及び図５（Ｃ）に示すように、内側領域２は、横軸Ｘから偏光レンズ１の上縁及び下縁のそれぞれの方に向かって、内側第一領域２０、内側第二領域２１及び内側第三領域２２の三つの領域に分けられている。そして、内側第一領域２０、内側第二領域２１及び内側第三領域２２の順で縦軸Ｙの方向に沿う曲がり度合が大きい。そのため、内側領域２は、内側第一領域２０において縦軸Ｙの方向に沿うカーブが最も緩やかであり、内側第二領域２１では内側第一領域２０よりも縦軸Ｙの方向に沿うカーブが急であり、内側第三領域２２において縦軸Ｙの方向に沿うカーブが最も急である。これにより、内側領域２における内側第一領域２０の縦軸Ｙの方向に沿う曲がり度合と、内側第三領域２２の縦軸Ｙの方向に沿う曲がり度合との差が大きくても、偏光レンズ１の内側領域２を縦軸Ｙの方向に沿って滑らかに湾曲させることができる。 In the inner region 2, the degree of curvature along the vertical axis Y preferably changes so as to increase from the horizontal axis X toward the upper and lower edges of the polarized lens 1. For example, as shown in Figures 2 and 5(C), the inner region 2 is divided into three regions, the inner first region 20, the inner second region 21, and the inner third region 22, from the horizontal axis X toward the upper and lower edges of the polarized lens 1. The degree of curvature along the vertical axis Y increases in the order of the inner first region 20, the inner second region 21, and the inner third region 22. Therefore, in the inner region 2, the curve along the vertical axis Y is the gentlest in the inner first region 20, the curve along the vertical axis Y is steeper in the inner second region 21 than in the inner first region 20, and the curve along the vertical axis Y is the steepest in the inner third region 22. This allows the inner region 2 of the polarized lens 1 to be smoothly curved along the vertical axis Y even if there is a large difference between the degree of curvature of the inner first region 20 in the inner region 2 along the vertical axis Y and the degree of curvature of the inner third region 22 along the vertical axis Y.
　内側第一領域２０の縦幅（縦軸Ｙに沿う長さ）と内側第二領域２１の縦幅（縦軸Ｙに沿う長さ）と内側第三領域２２の縦幅（縦軸Ｙに沿う長さ）は特に限定されないが、概ね等しい。 The vertical width (length along the vertical axis Y) of the first inner region 20, the vertical width (length along the vertical axis Y) of the second inner region 21, and the vertical width (length along the vertical axis Y) of the third inner region 22 are not particularly limited, but are generally equal.
　内側第一領域２０、内側第二領域２１及び内側第三領域２２において、縦軸Ｙの方向に沿う曲がり度合は、好ましくはそれぞれの全域において一定な値であるが、必ずしもその全域で一定な値でなくてもよい。 In the first inner region 20, the second inner region 21, and the third inner region 22, the degree of bending along the direction of the vertical axis Y is preferably a constant value throughout each region, but does not necessarily have to be a constant value throughout the entire region.
　外側領域３において、中央領域３０の縦軸Ｙの方向に沿う曲がり度合は、好ましくは横軸Ｘから偏光レンズ１の上縁及び下縁のそれぞれに向けて大きくなるように変化している。例えば、図２及び図５（Ｃ）に示すように、中央領域３０は、横軸Ｘから偏光レンズ１の上縁及び下縁のそれぞれの方に向かって、中央第一領域３００及び中央第二領域３０１の二つの領域に分けられている。そして、中央第一領域３００及び中央第二領域３０１の順で縦軸Ｙの方向に沿う曲がり度合が大きい。そのため、中央領域３０は、中央第一領域３０よりも中央第二領域３０１の方が縦軸Ｙの方向に沿うカーブが急である。 In the outer region 3, the degree of curvature of the central region 30 along the vertical axis Y preferably changes so as to increase from the horizontal axis X toward the upper and lower edges of the polarized lens 1. For example, as shown in Figures 2 and 5(C), the central region 30 is divided into two regions, a central first region 300 and a central second region 301, from the horizontal axis X toward the upper and lower edges of the polarized lens 1. The degree of curvature along the vertical axis Y increases in the order of the central first region 300 and the central second region 301. Therefore, in the central region 30, the curve along the vertical axis Y is steeper in the central second region 301 than in the central first region 30.
　中央第一領域３００の縦幅（縦軸Ｙに沿う長さ）と中央第二領域３０１の縦幅（縦軸Ｙに沿う長さ）は特に限定されないが、概ね等しい。 The vertical width (length along the vertical axis Y) of the central first region 300 and the vertical width (length along the vertical axis Y) of the central second region 301 are not particularly limited, but are generally equal.
　中央第一領域３００及び中央第二領域３０１において、縦軸Ｙの方向に沿う曲がり度合は、好ましくはそれぞれの全域において一定な値であるが、必ずしもその全域で一定な値でなくてもよい。 In the first central region 300 and the second central region 301, the degree of bending along the direction of the vertical axis Y is preferably a constant value throughout each region, but does not necessarily have to be a constant value throughout the region.
　外側領域３において、側方領域３１の縦軸Ｙの方向に沿う曲がり度合は、好ましくはその全域において一定な値であるが、必ずしもその全域で一定な値でなくてもよい。 In the outer region 3, the degree of bending along the direction of the vertical axis Y of the side region 31 is preferably a constant value throughout the entire region, but does not necessarily have to be a constant value throughout the entire region.
　偏光レンズ１の縦軸Ｙの方向に沿う曲がり度合は、外側領域３の側方領域３１において最も大きく、好ましくは、外側領域３の中央領域３０における中央第二領域３０１、及び、内側領域２の内側第三領域２２においても最も大きい。また、偏光レンズ１の縦軸Ｙの方向に沿う曲がり度合は、好ましくは、外側領域３の中央領域３０における中央第一領域３００、及び、内側領域２の内側第二領域２１において次に大きい。また、偏光レンズ１の縦軸Ｙの方向に沿う曲がり度合は、好ましくは、内側領域２の内側第一領域２０において最も小さい。 The degree of bending of the polarized lens 1 along the direction of the vertical axis Y is greatest in the lateral regions 31 of the outer region 3, and is preferably also greatest in the central second region 301 in the central region 30 of the outer region 3 and the inner third region 22 of the inner region 2. The degree of bending of the polarized lens 1 along the direction of the vertical axis Y is preferably next greatest in the central first region 300 in the central region 30 of the outer region 3 and the inner second region 21 of the inner region 2. The degree of bending of the polarized lens 1 along the direction of the vertical axis Y is preferably smallest in the inner first region 20 of the inner region 2.
　偏光レンズ１の横軸Ｘの方向に沿う曲がり度合と縦軸Ｙの方向に沿う曲がり度合の関係は、好ましくは、最も大きい曲がり度合同士でその値が概ね等しく、次に大きい曲がり度合同士でその値が概ね等しく、最も小さい曲がり度合同士でその値が概ね等しい。つまり、外側領域３の側方領域３１において、横軸Ｘの方向に沿う曲がり度合と縦軸Ｙの方向に沿う曲がり度合は概ね等しく、側方領域３０は高カーブで球面状に湾曲している。同様に、外側領域３の中央領域３０の中央第一領域３００において、横軸Ｘの方向に沿う曲がり度合と縦軸Ｙの方向に沿う曲がり度合は概ね等しく、中央第一領域３００は中カーブで球面状に湾曲している。同様に、内側領域２の内側第一領域２０において、横軸Ｘの方向に沿う曲がり度合と縦軸Ｙの方向に沿う曲がり度合は概ね等しく、中央第一領域２０は低カーブで球面状に湾曲している。 The relationship between the degree of curvature along the horizontal axis X of the polarized lens 1 and the degree of curvature along the vertical axis Y is preferably such that the largest degrees of curvature are approximately equal in value, the next largest degrees of curvature are approximately equal in value, and the smallest degrees of curvature are approximately equal in value. In other words, in the lateral regions 31 of the outer region 3, the degree of curvature along the horizontal axis X and the degree of curvature along the vertical axis Y are approximately equal, and the lateral regions 30 are highly curved and spherically curved. Similarly, in the central first region 300 of the central region 30 of the outer region 3, the degree of curvature along the horizontal axis X and the degree of curvature along the vertical axis Y are approximately equal, and the central first region 300 is moderately curved and spherically curved. Similarly, in the inner first region 20 of the inner region 2, the degree of curvature along the horizontal axis X and the degree of curvature along the vertical axis Y are approximately equal, and the central first region 20 is curved spherically with a small curve.
　上述した構造の偏光レンズ１において、内側領域２は、図１及び図２に示すように、アイポイント想定領域４を含む。アイポイント想定領域４とは、レンズ玉をフレームに装着した際にユーザの瞳孔が当たると想定される仮想領域である。アイポイント想定領域４は、一般的に人の左右の眼の間の距離が３２ｍｍであることを参考にして設定される。 In the polarized lens 1 with the above-described structure, the inner region 2 includes an assumed eyepoint region 4, as shown in Figures 1 and 2. The assumed eyepoint region 4 is a virtual region where it is assumed that the user's pupil will hit when the lens is attached to the frame. The assumed eyepoint region 4 is set with reference to the fact that the distance between a person's left and right eyes is generally 32 mm.
　本開示では、図６に示すように、内側領域２において、直径２０ｍｍの仮想円５を、仮想円５の中心がレンズ中心Ｃから横軸Ｘの方向に第一距離Ｄ１離れた位置から第二距離Ｄ２離れた位置まで到達するように仮想円５を移動させることでできる、前記仮想円５が通った跡の仮想領域がアイポイント想定領域４である。ここで、第一距離Ｄ１は、８ｍｍ以上１１ｍｍ以下であり、好ましくは９ｍｍ以上１１ｍｍ以下であり、最も好ましくは１０ｍｍである。第二距離Ｄ２は、１８ｍｍ以上２１ｍｍ以下である。第一距離Ｄ１及び第二距離Ｄ２は、株式会社トプコン製のコンピュータレンズメータＣＬ－２０００を用いて測定可能である。 In this disclosure, as shown in FIG. 6, in the inner region 2, a virtual circle 5 having a diameter of 20 mm is moved so that the center of the virtual circle 5 reaches a position from a position away from the lens center C in the direction of the horizontal axis X from a position away from the lens center C by a first distance D1 to a position away from the lens center C by a second distance D2. The virtual region traced by the virtual circle 5 is the assumed eyepoint region 4. Here, the first distance D1 is 8 mm or more and 11 mm or less, preferably 9 mm or more and 11 mm or less, and most preferably 10 mm. The second distance D2 is 18 mm or more and 21 mm or less. The first distance D1 and the second distance D2 can be measured using a computer lens meter CL-2000 manufactured by Topcon Corporation.
　アイポイント想定領域４は、好ましくは内側領域２の内側第一領域２０に含まれる。つまり、偏光レンズ１において、横軸Ｘの方向に沿う曲がり度合及び縦軸Ｙの方向に沿う曲がり度合が最も小さい領域にアイポイント想定領域４が含まれる。 The expected eyepoint region 4 is preferably included in the first inner region 20 of the inner region 2. In other words, the expected eyepoint region 4 is included in the region of the polarized lens 1 where the degree of bending along the horizontal axis X and the degree of bending along the vertical axis Y are the smallest.
　アイポイント想定領域４では、球面度数が－０．１２以上＋０．１２以下であり、好ましくは－０．０９以上＋０．０９以下である。球面度数は、偏光レンズ１の表側の凸面の横軸Ｘの方向に沿う曲がり度合と裏側の凹面の横軸Ｘの方向に沿う曲がり度合との間の大きさの相違で生じる光の屈折力の度数をｄ１とし、偏光レンズ１の表側の凸面の縦軸Ｙの方向に沿う曲がり度合と裏側の凹面の縦軸Ｙの方向に沿う曲がり度合との間の大きさの相違で生じる光の屈折力の度数をｄ２として、（ｄ１＋ｄ２）／２で表わされる。ＩＳＯ規格では、－０．１２以上＋０．１２以下が合格基準とされており、球面度数がゼロに近い程、好ましい。 In the assumed eye point region 4, the spherical power is -0.12 or more and +0.12 or less, and preferably -0.09 or more and +0.09 or less. The spherical power is expressed as (d1 + d2)/2, where d1 is the power of the refractive power of light caused by the difference in magnitude between the degree of curvature along the horizontal axis X of the convex surface on the front side of the polarizing lens 1 and the degree of curvature along the horizontal axis X of the concave surface on the back side, and d2 is the power of the refractive power of light caused by the difference in magnitude between the degree of curvature along the vertical axis Y of the convex surface on the front side of the polarizing lens 1 and the degree of curvature along the vertical axis Y of the concave surface on the back side. In the ISO standard, a value of -0.12 or more and +0.12 or less is the pass standard, and the closer to zero the spherical power, the better.
　上述した球面度数は、偏光レンズ１の素材（支持板１３）の屈折率、偏光レンズ１の厚み、偏光レンズ１の表側の凸面１０Ａの曲がり度合（曲率半径）、偏光レンズ１の裏側の凹面１０Ｂの曲がり度合（曲率半径）が大きな要素となる。例えば、偏光レンズ１の厚みが薄いと球面度数は小さくなり、偏光レンズ１の曲がり度合が小さいと球面度数は小さくなる。偏光レンズ１の設計の際には、これらの要素に基づいてアイポイント想定領域４の球面度数が計算される。 The spherical power mentioned above is determined mainly by the refractive index of the material (support plate 13) of polarizing lens 1, the thickness of polarizing lens 1, the degree of curvature (radius of curvature) of convex surface 10A on the front side of polarizing lens 1, and the degree of curvature (radius of curvature) of concave surface 10B on the back side of polarizing lens 1. For example, if the thickness of polarizing lens 1 is thin, the spherical power will be small, and if the degree of curvature of polarizing lens 1 is small, the spherical power will be small. When designing polarizing lens 1, the spherical power of the assumed eyepoint area 4 is calculated based on these factors.
　アイポイント想定領域４の球面度数を－０．１２以上＋０．１２以下にするための例として、偏光膜１２の両面にポリカーボネート製の支持板１３が積層された厚み０．９ｍｍの積層板１１を用いて偏光レンズ１を構成し、アイポイント想定領域４の横軸Ｘの方向に沿う曲がり度合及び縦軸Ｙの方向に沿う曲がり度合をともに６Ｒ以下とした偏光レンズ１を挙げることができる。なお、曲がり度合は、偏光レンズ１の表側の凸面１０Ａの曲がり度合いである。 As an example of how to make the spherical power of the expected eyepoint area 4 between -0.12 and +0.12, a polarizing lens 1 can be made using a 0.9 mm thick laminate 11 in which polycarbonate support plates 13 are laminated on both sides of a polarizing film 12, and the degree of curvature of the expected eyepoint area 4 along the horizontal axis X and along the vertical axis Y are both 6R or less. Note that the degree of curvature refers to the degree of curvature of the convex surface 10A on the front side of the polarizing lens 1.
　この例では、具体的には、以下の表１の例１－２に示す曲がり度合で偏光レンズ１を設計することができる。例１－２に示す曲がり度合を有する偏光レンズ１は、外側領域３の側方領域３１が８Ｒ×８Ｒの球面状に湾曲しているため、８Ｒ×８Ｒの球面状に湾曲した偏光レンズに適合した既存のフレームにも装着できる。 In this example, specifically, polarized lens 1 can be designed with the degree of curvature shown in Example 1-2 in Table 1 below. Polarized lens 1 having the degree of curvature shown in Example 1-2 can also be attached to existing frames that fit polarized lenses curved into a spherical shape of 8R x 8R, because the side regions 31 of the outer region 3 are curved into a spherical shape of 8R x 8R.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　アイポイント想定領域４の球面度数を－０．１２以上＋０．１２以下にするための他の例として、偏光膜１２の両面にポリカーボネート製の支持板１３が積層された厚み１．５ｍｍの積層板１１を用いて偏光レンズ１を構成し、アイポイント想定領域４の横軸Ｘの方向に沿う曲がり度合及び縦軸Ｙの方向に沿う曲がり度合をともに５Ｒ以下とした偏光レンズ１を挙げることができる。なお、曲がり度合は、偏光レンズ１の表側の凸面１０Ａの曲がり度合いである。 Another example of a method for making the spherical power of the expected eyepoint area 4 between -0.12 and +0.12 is a polarizing lens 1 constructed using a 1.5 mm thick laminate 11 in which polycarbonate support plates 13 are laminated on both sides of a polarizing film 12, and in which the degree of curvature of the expected eyepoint area 4 along the horizontal axis X and along the vertical axis Y are both 5R or less. Note that the degree of curvature refers to the degree of curvature of the convex surface 10A on the front side of the polarizing lens 1.
　この例では、具体的には、以下の表２の例３－４に示す曲がり度合で偏光レンズ１を設計することができる。例３－４に示す曲がり度合を有する偏光レンズ１は、外側領域の側方領域が６Ｒ×６Ｒの球面状に湾曲しているため、６Ｒ×６Ｒの球面状に湾曲した偏光レンズに適合した既存のフレームにも装着できる。 In this example, specifically, polarized lens 1 can be designed with the degree of curvature shown in Example 3-4 of Table 2 below. Polarized lens 1 having the degree of curvature shown in Example 3-4 has a 6R x 6R spherically curved side region of the outer region, and therefore can be attached to existing frames that fit 6R x 6R spherically curved polarized lenses.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　ポリカーボネート（ＰＣ）の屈折率は約１．５８３であり、ガラスの屈折率（約１．５２３）、アクリル樹脂（ＰＭＭＡ）の屈折率（約１．４９２）、ポリアミド樹脂（ＰＡ）の屈折率（約１．５３０）よりも大きい。そのため、上述した例１－４に示す曲がり度合で偏光レンズ１を設計した場合、支持板１３の素材がポリカーボネートではなく、例えばガラス、アクリル樹脂、ポリアミド樹脂、ポリビニルアルコールなどであっても、アイポイント想定領域４の球面度数を－０．１２以上＋０．１２以下にすることができるのは容易に認識できる。 The refractive index of polycarbonate (PC) is approximately 1.583, which is greater than the refractive index of glass (approximately 1.523), acrylic resin (PMMA) (approximately 1.492), and polyamide resin (PA) (approximately 1.530). Therefore, if polarized lens 1 is designed with the degree of curvature shown in Example 1-4 above, it is easy to recognize that the spherical power of the expected eyepoint area 4 can be made between -0.12 and +0.12 even if the material of the support plate 13 is not polycarbonate but, for example, glass, acrylic resin, polyamide resin, polyvinyl alcohol, etc.
　球面度数は、望遠鏡、接眼レンズ、測定チャートなどのＩＳＯ規格に準ずる測定機器を用いて、偏光レンズ１から製作されるレンズ玉をフレームに装着したことを想定して偏光レンズ１を水平方向及び垂直方向にそれぞれ傾斜させた状態にして、測定することができる。望遠鏡は、例えばＬｉＮＯＳ社製の読み取り望遠鏡（集光範囲１２００ｍｍから∞、軸観測、接眼レンズ無しで１．２×倍率）を用いることができ、接眼レンズは、例えばＬｉＮＯＳ社製の接眼レンズ（倍率１０倍）を用いることができ、測定チャートは、例えば４．４ｍｍ用Ｐｏｗｅｒ＆プリズムチャートを用いることができる。また、例えばＥＬＥＣＯＭ社製のＵＶＣ　ＷＥＢカメラ（最大画素数１６００×１２００ピクセル）を用いて測定チャートをパソコンに表示させることができる。 The spherical power can be measured using measuring equipment conforming to ISO standards, such as a telescope, eyepiece, and measurement chart, with the polarizing lens 1 tilted horizontally and vertically, assuming that a lens ball made from the polarizing lens 1 is attached to a frame. The telescope can be, for example, a LiNOS reading telescope (focusing range 1200 mm to infinity, axial observation, 1.2x magnification without eyepiece), the eyepiece can be, for example, a LiNOS eyepiece (10x magnification), and the measurement chart can be, for example, a 4.4 mm Power & Prism Chart. The measurement chart can also be displayed on a computer using, for example, an ELECOM UVC WEB camera (maximum pixel count 1600 x 1200 pixels).
　測定チャートと望遠鏡の間の距離を４．４ｍに設定し、ピント合わせのダイヤル位置をゼロの状態でピントが合うように接眼レンズを調整する。球面度数が－０．１２の基準となる偏光レンズをセットし、チャートと望遠鏡の十字マークを合わせた状態で、ピントを合わせてダイヤル目盛を確認し、マイナス方向の１３目盛であれば校正不要である。そして、測定対象の偏光レンズをセットし、まずチャートの縦線にピントを合わせてダイヤル目盛を確認する。次にチャートの横線にピントを合わせてダイヤル目盛を確認する。以下の表３に示す目盛換算表を用いてそれぞれのダイヤル目盛から度数ｄ１，ｄ２に換算することで、計算式（ｄ１＋ｄ２）／２から球面度数を求めることができる。 Set the distance between the measurement chart and the telescope to 4.4 m, and adjust the eyepiece so that it is in focus with the focusing dial position at zero. Set a reference polarized lens with a spherical power of -0.12, and with the chart and the cross mark on the telescope aligned, focus and check the dial scale; if it is 13 marks in the negative direction, no calibration is necessary. Then, set the polarized lens to be measured, first focus on the vertical lines on the chart and check the dial scale. Next, focus on the horizontal lines on the chart and check the dial scale. By converting each dial scale to power d1 and d2 using the scale conversion table shown in Table 3 below, the spherical power can be calculated from the formula (d1 + d2)/2.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　また、アイポイント想定領域４では、好ましくは非点収差度数が０．１２以下である。非点収差度数は、ｄ１とｄ２の屈折力の差｜ｄ１－ｄ２｜を表していて偏光レンズ１の曲面の歪みの大きさを示すパラメータである。非点収差度数の値が小さい程、歪みが小さいことを意味するため、好ましい。レンズ歪みが小さいことで、ユーザの眼に悪影響を及ぼすのを抑制することができる。 In addition, in the assumed eyepoint area 4, the astigmatism power is preferably 0.12 or less. The astigmatism power represents the difference in refractive power between d1 and d2, |d1-d2|, and is a parameter that indicates the degree of distortion of the curved surface of the polarized lens 1. A smaller value of the astigmatism power is preferable, as it means that the distortion is smaller. Small lens distortion can prevent adverse effects on the user's eyes.
　非点収差度数は、上述した球面度数の測定で得られた上記度数ｄ１，ｄ２を用いて計算式｜ｄ１－ｄ２｜から求めることができる。 The astigmatism power can be calculated from the formula |d1-d2| using the powers d1 and d2 obtained in the spherical power measurement described above.
　上述した本実施形態の偏光レンズ１では、外側領域３の少なくとも側方領域３１の曲がり度合について、例えば８Ｒ×８Ｒや６Ｒ×６Ｒの球面状に湾曲した偏光レンズの曲がり度合を維持しつつ、内側領域２の中でユーザの瞳孔が当たると想定されるアイポイント想定領域４における横軸Ｘの方向に沿う曲がり度合及び縦軸Ｙの方向に沿う曲がり度合を外側領域３よりも小さくして、アイポイント想定領域４の球面度数を－０．１２以上＋０．１２以下、好ましくは－０．０９以上＋０．０９以下としている。これにより、アイポイント想定領域４における光の屈折力を低減することができるため、本実施形態の偏光レンズ１によれば、眼に対する悪影響を抑制することができ、かつ、既存の球面状に湾曲した偏光レンズに適合したフレームにも装着できる。 In the polarized lens 1 of this embodiment described above, the degree of curvature of at least the side regions 31 of the outer region 3 is maintained at the same level as that of a spherically curved polarized lens, for example 8R x 8R or 6R x 6R, while the degree of curvature along the horizontal axis X and along the vertical axis Y in the eyepoint assumed region 4 in the inner region 2, where the user's pupil is assumed to be, is made smaller than that of the outer region 3, and the spherical power of the eyepoint assumed region 4 is set to -0.12 or more and +0.12 or less, preferably -0.09 or more and +0.09 or less. This reduces the refractive power of light in the eyepoint assumed region 4, so that the polarized lens 1 of this embodiment can suppress adverse effects on the eyes and can be attached to frames that are compatible with existing spherically curved polarized lenses.
　また、本実施形態の偏光レンズ１では、外側領域３は、横軸Ｘの方向に沿って、レンズ中心Ｃ側の中央領域３０及び該偏光レンズ１の外縁側の側方領域３１に分けられており、中央領域３０の横軸Ｘの方向に沿う曲がり度合は、側方領域３１の横軸Ｘの方向に沿う曲がり度合より小さい。そのため、本実施形態の偏光レンズ１によれば、横軸Ｘの方向に沿う曲がり度合が偏光レンズ１の外縁からレンズ中心Ｃ、偏光レンズ１の内縁にわたって段階的に小さくなるように変化しており、外側から内側に向かって横軸Ｘの方向に沿うカーブが徐々に緩やかになっている。これにより、偏光レンズ１を横軸Ｘの方向に沿って滑らかに湾曲させることができる。 Furthermore, in the polarized lens 1 of this embodiment, the outer region 3 is divided along the horizontal axis X into a central region 30 on the lens center C side and a side region 31 on the outer edge side of the polarized lens 1, and the degree of curvature along the horizontal axis X of the central region 30 is smaller than the degree of curvature along the horizontal axis X of the side region 31. Therefore, according to the polarized lens 1 of this embodiment, the degree of curvature along the horizontal axis X changes so as to become smaller in stages from the outer edge of the polarized lens 1 to the lens center C to the inner edge of the polarized lens 1, and the curve along the horizontal axis X from the outside to the inside becomes gradually gentler. This allows the polarized lens 1 to be curved smoothly along the horizontal axis X.
　また、本実施形態の偏光レンズ１では、内側領域２は、横軸Ｘから該偏光レンズ１の上縁及び下縁のそれぞれの方に向かって、内側第一領域２０、内側第二領域２１及び内側第三領域２２に分かれており、内側第一領域２０、内側第二領域２１及び内側第三領域２２の順で縦軸Ｙの方向に沿う曲がり度合が大きい。さらに、外側領域３における中央領域３０は、横軸Ｘから該偏光レンズ１の上縁及び下縁のそれぞれの方に向かって、中央第一領域３００及び中央第二領域３０１に分けられており、中央第二領域３０１の縦軸Ｙの方向に沿う曲がり度合が中央第一領域３００の縦軸Ｙの方向に沿う曲がり度合より大きい。そのため、本実施形態の偏光レンズ１によれば、偏光レンズ１の縦軸Ｙの方向に沿う曲がり度合が、最も大きい外側領域３の側方領域３１から最も小さい内側領域２の内側第一領域２０にわたって段階的に小さくなるように変化しており、縦軸Ｙの方向に沿うカーブが徐々に緩やかになっている。これにより、偏光レンズ１を縦軸Ｙの方向に沿って滑らかに湾曲させることができる。 In addition, in the polarized lens 1 of this embodiment, the inner region 2 is divided into an inner first region 20, an inner second region 21, and an inner third region 22 from the horizontal axis X toward the upper and lower edges of the polarized lens 1, respectively, with the degree of curvature along the vertical axis Y increasing in the order of the inner first region 20, the inner second region 21, and the inner third region 22. Furthermore, the central region 30 in the outer region 3 is divided into a central first region 300 and a central second region 301 from the horizontal axis X toward the upper and lower edges of the polarized lens 1, respectively, with the degree of curvature along the vertical axis Y of the central second region 301 being greater than the degree of curvature along the vertical axis Y of the central first region 300. Therefore, according to the polarized lens 1 of this embodiment, the degree of curvature along the vertical axis Y of the polarized lens 1 changes so as to become gradually smaller from the largest lateral region 31 of the outer region 3 to the smallest inner first region 20 of the inner region 2, with the curve along the vertical axis Y gradually becoming gentler. This allows the polarizing lens 1 to be smoothly curved along the direction of the vertical axis Y.
　また、本実施形態の偏光レンズ１では、アイポイント想定領域４の非点収差度数が０．１２以下である。そのため、本実施形態の偏光レンズ１によれば、レンズ歪みが小さいので、ユーザの眼に悪影響を及ぼすのを抑制することができることができる。 In addition, in the polarized lens 1 of this embodiment, the astigmatism power in the assumed eyepoint region 4 is 0.12 or less. Therefore, with the polarized lens 1 of this embodiment, lens distortion is small, making it possible to suppress adverse effects on the user's eyes.
　以上、本開示の偏光レンズの一実施形態について説明したが、本開示の偏光レンズは上述した実施形態に限定されるものではなく、本開示の趣旨を逸脱しない限りにおいて種々の変形が可能である。 The above describes one embodiment of the polarized lens of the present disclosure, but the polarized lens of the present disclosure is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present disclosure.
　以下、本開示の偏光レンズの実施例について説明する。 Below, we will explain examples of the polarized lenses disclosed herein.
　実施例１の偏光レンズは、偏光膜の両面に厚み０．４ｍｍのポリカーボネート製の支持板がそれぞれ積層された厚み０．９ｍｍの積層板を曲げ加工により非球面状に湾曲させたものである。偏光レンズの大きさは横軸の方向の長さが８０ｍｍ、縦軸の方向の長さが６０ｍｍである。図２に示すように、偏光レンズは、レンズ中心を境にして内側領域と外側領域とに分けられている。また、内側領域は、縦軸の方向に沿って偏光レンズの上縁から下縁の間において内側第三領域、内側第二領域、内側第一領域、内側第二領域、内側第三領域に分けられ、それぞれの縦軸の方向の長さは、１０ｍｍ、１０ｍｍ、２０ｍｍ、１０ｍｍ、１０ｍｍである。外側領域は、中央領域及び側方領域に分けられ、それぞれの横軸の方向の長さは、２０ｍｍ、２０ｍｍである。また、中央領域は、縦軸の方向に沿って上縁から下縁の間において中央第二領域、中央第一領域、中央第二領域に分けられ、それぞれの縦軸の方向の長さは、２０ｍｍ、２０ｍｍ、２０ｍｍである。アイポイント想定領域は、内側領域において、直径２０ｍｍの仮想円を、該仮想円の中心がレンズ中心から横軸の方向に１０ｍｍ離れた位置から２１ｍｍ離れた位置まで到達するよう前記仮想円を移動させることでできる仮想領域としており、内側第一領域に含まれている。 The polarized lens of Example 1 is a 0.9 mm thick laminated plate, in which a 0.4 mm thick polycarbonate support plate is laminated on both sides of a polarizing film, and curved into an aspheric shape by bending. The size of the polarized lens is 80 mm in the horizontal axis direction and 60 mm in the vertical axis direction. As shown in FIG. 2, the polarized lens is divided into an inner region and an outer region with the center of the lens as the boundary. The inner region is also divided into an inner third region, an inner second region, an inner first region, an inner second region, and an inner third region along the vertical axis between the upper edge and the lower edge of the polarized lens, and the lengths of the respective regions in the vertical axis direction are 10 mm, 10 mm, 20 mm, 10 mm, and 10 mm. The outer region is divided into a central region and a side region, and the lengths of the respective regions in the horizontal axis direction are 20 mm and 20 mm. The central region is divided into a central second region, a central first region, and a central second region between the upper edge and the lower edge along the vertical axis, and the lengths of these regions along the vertical axis are 20 mm, 20 mm, and 20 mm, respectively. The eyepoint assumed region is a virtual region in the inner region that is created by moving a virtual circle with a diameter of 20 mm so that the center of the virtual circle reaches a position 10 mm away from the center of the lens in the horizontal axis direction to a position 21 mm away, and is included in the inner first region.
　実施例１の偏光レンズの各領域は、上述した表１の例１に示された曲がり度合を有する。 Each region of the polarized lens in Example 1 has the degree of curvature shown in Example 1 of Table 1 above.
　実施例２の偏光レンズは、偏光膜の両面に厚み０．７ｍｍのポリカーボネート製の支持板がそれぞれ積層された厚み１．５ｍｍの積層板を曲げ加工により非球面状に湾曲させたものである。偏光レンズの大きさは横軸の方向の長さが８０ｍｍ、縦軸の方向の長さが６０ｍｍである。図２に示すように、偏光レンズは、レンズ中心を境にして内側領域と外側領域とに分けられている。また、内側領域は、縦軸の方向に沿って偏光レンズの上縁から下縁の間において内側第三領域、内側第二領域、内側第一領域、内側第二領域、内側第三領域に分けられ、それぞれの縦軸の方向の長さは、１０ｍｍ、１０ｍｍ、２０ｍｍ、１０ｍｍ、１０ｍｍである。外側領域は、中央領域及び側方領域に分けられ、それぞれの横軸の方向の長さは、２０ｍｍ、２０ｍｍである。また、中央領域は、縦軸の方向に沿って上縁から下縁の間において中央第二領域、中央第一領域、中央第二領域に分けられ、それぞれの縦軸の方向の長さは、２０ｍｍ、２０ｍｍ、２０ｍｍである。アイポイント想定領域は、内側領域において、直径２０ｍｍの仮想円を、該仮想円の中心がレンズ中心から横軸の方向に１０ｍｍ離れた位置から１８ｍｍ離れた位置まで到達するよう前記仮想円を移動させることでできる仮想領域としており、内側第一領域に含まれている。 The polarized lens of Example 2 is a 1.5 mm thick laminated plate, in which a 0.7 mm thick polycarbonate support plate is laminated on both sides of a polarizing film, and is curved into an aspheric shape by bending. The size of the polarized lens is 80 mm in the horizontal axis direction and 60 mm in the vertical axis direction. As shown in FIG. 2, the polarized lens is divided into an inner region and an outer region with the center of the lens as the boundary. The inner region is also divided into an inner third region, an inner second region, an inner first region, an inner second region, and an inner third region along the vertical axis between the upper edge and the lower edge of the polarized lens, and the lengths of the respective regions in the vertical axis direction are 10 mm, 10 mm, 20 mm, 10 mm, and 10 mm. The outer region is divided into a central region and a side region, and the lengths of the respective regions in the horizontal axis direction are 20 mm and 20 mm. The central region is divided into a central second region, a central first region, and a central second region between the upper edge and the lower edge along the vertical axis, and the lengths of these regions along the vertical axis are 20 mm, 20 mm, and 20 mm, respectively. The eyepoint assumption region is a virtual region in the inner region that is created by moving a virtual circle with a diameter of 20 mm so that the center of the virtual circle reaches a position 10 mm away from the center of the lens in the horizontal axis direction to a position 18 mm away, and is included in the inner first region.
　実施例２の偏光レンズの各領域は、上述した表２の例３に示された曲がり度合を有する。 Each region of the polarized lens of Example 2 has the degree of curvature shown in Example 3 of Table 2 above.
　実施例３の偏光レンズは、偏光膜の両面に厚み０．５ｍｍのポリカーボネート製の支持板がそれぞれ積層された厚み１．１ｍｍの積層板を曲げ加工により非球面状に湾曲させたものである。偏光レンズの大きさは横軸の方向の長さが８０ｍｍ、縦軸の方向の長さが６０ｍｍである。図２に示すように、偏光レンズは、レンズ中心を境にして内側領域と外側領域とに分けられている。また、内側領域は、縦軸の方向に沿って偏光レンズの上縁から下縁の間において内側第三領域、内側第二領域、内側第一領域、内側第二領域、内側第三領域に分けられ、それぞれの縦軸の方向の長さは、１０ｍｍ、１０ｍｍ、２０ｍｍ、１０ｍｍ、１０ｍｍである。外側領域は、中央領域及び側方領域に分けられ、それぞれの横軸の方向の長さは、２０ｍｍ、２０ｍｍである。また、中央領域は、縦軸の方向に沿って上縁から下縁の間において中央第二領域、中央第一領域、中央第二領域に分けられ、それぞれの縦軸の方向の長さは、２０ｍｍ、２０ｍｍ、２０ｍｍである。アイポイント想定領域は、内側領域において、直径２０ｍｍの仮想円を、該仮想円の中心がレンズ中心から横軸の方向に１０ｍｍ離れた位置から２１ｍｍ離れた位置まで到達するよう前記仮想円を移動させることでできる仮想領域としており、内側第一領域に含まれている。 The polarized lens of Example 3 is a 1.1 mm thick laminated plate, in which a 0.5 mm thick polycarbonate support plate is laminated on both sides of a polarizing film, and curved into an aspheric shape by bending. The size of the polarized lens is 80 mm in the horizontal axis direction and 60 mm in the vertical axis direction. As shown in FIG. 2, the polarized lens is divided into an inner region and an outer region with the center of the lens as the boundary. The inner region is also divided into an inner third region, an inner second region, an inner first region, an inner second region, and an inner third region along the vertical axis between the upper edge and the lower edge of the polarized lens, and the lengths of the respective regions in the vertical axis direction are 10 mm, 10 mm, 20 mm, 10 mm, and 10 mm. The outer region is divided into a central region and a side region, and the lengths of the respective regions in the horizontal axis direction are 20 mm and 20 mm. The central region is divided into a central second region, a central first region, and a central second region between the upper edge and the lower edge along the vertical axis, and the lengths of these regions along the vertical axis are 20 mm, 20 mm, and 20 mm, respectively. The eyepoint assumed region is a virtual region in the inner region that is created by moving a virtual circle with a diameter of 20 mm so that the center of the virtual circle reaches a position 10 mm away from the center of the lens in the horizontal axis direction to a position 21 mm away, and is included in the inner first region.
　実施例３の偏光レンズの各領域は、上述した表１の例１に示された曲がり度合を有する。 Each region of the polarized lens of Example 3 has the degree of curvature shown in Example 1 of Table 1 above.
　比較例１の偏光レンズは、偏光膜の両面に厚み０．４ｍｍのポリカーボネート製の支持板がそれぞれ積層された厚み０．９ｍｍの積層板を曲げ加工により、横軸の方向に沿う曲がり度合及び縦軸の方向に沿う曲がり度合がともに８Ｒの球面状に湾曲させたものである。偏光レンズの大きさは横軸の方向の長さが８０ｍｍ、縦軸の方向の長さが６０ｍｍである。 The polarized lens of Comparative Example 1 is made by bending a 0.9 mm thick laminated plate, with 0.4 mm thick polycarbonate support plates laminated on both sides of a polarizing film, into a spherical shape with a curvature of 8R along both the horizontal and vertical axes. The size of the polarized lens is 80 mm in the horizontal direction and 60 mm in the vertical direction.
　比較例２の偏光レンズは、偏光膜の両面に厚み０．７ｍｍのポリカーボネート製の支持板がそれぞれ積層された厚み１．５ｍｍの積層板を曲げ加工により、横軸の方向に沿う曲がり度合及び縦軸の方向に沿う曲がり度合がともに６Ｒの球面状に湾曲させたものである。偏光レンズの大きさは横軸の方向の長さが８０ｍｍ、縦軸の方向の長さが６０ｍｍである。 The polarized lens of Comparative Example 2 is made by bending a 1.5 mm thick laminated plate, with 0.7 mm thick polycarbonate support plates laminated on both sides of a polarizing film, into a spherical shape with a curvature of 6R along both the horizontal and vertical axes. The size of the polarized lens is 80 mm in length along the horizontal axis and 60 mm in length along the vertical axis.
　比較例３の偏光レンズは、偏光膜の両面に厚み０．５ｍｍのポリカーボネート製の支持板がそれぞれ積層された厚み１．１ｍｍの積層板を曲げ加工により、横軸の方向に沿う曲がり度合及び縦軸の方向に沿う曲がり度合がともに８Ｒの球面状に湾曲させたものである。偏光レンズの大きさは横軸の方向の長さが８０ｍｍ、縦軸の方向の長さが６０ｍｍである。 The polarized lens of Comparative Example 3 is made by bending a 1.1 mm thick laminate with a 0.5 mm thick polycarbonate support plate laminated on both sides of a polarizing film into a spherical shape with a curvature of 8R along both the horizontal and vertical axes. The size of the polarized lens is 80 mm in the horizontal direction and 60 mm in the vertical direction.
　実施例１及び比較例１の偏光レンズについて、レンズ玉をフレームに装着した想定の条件で、レンズ中心から横軸の方向に沿って内側に１０ｍｍ離れた位置（図６（Ｂ）のＰ１を参照）と、レンズ中心から横軸の方向に沿って内側に２１ｍｍ離れた位置（図６（Ｂ）のＰ２を参照）における球面度数及び非点収差度数をＩＳＯ規格に準ずる測定機器を用いて測定した。 For the polarized lenses of Example 1 and Comparative Example 1, under the assumption that the lens ball is attached to a frame, the spherical power and astigmatism power were measured using measuring equipment conforming to ISO standards at a position 10 mm inward from the center of the lens along the horizontal axis (see P1 in Figure 6(B)) and at a position 21 mm inward from the center of the lens along the horizontal axis (see P2 in Figure 6(B)).
　また、実施例２及び比較例２の偏光レンズについて、レンズ玉をフレームに装着した想定の条件で、レンズ中心から横軸の方向に沿って内側に１０ｍｍ離れた位置（図６（Ｂ）のＰ１を参照）と、レンズ中心から横軸の方向に沿って内側に１８ｍｍ離れた位置（図６（Ｂ）のＰ２を参照）における球面度数及び非点収差度数をＩＳＯ規格に準ずる測定機器を用いて測定した。 Furthermore, for the polarized lenses of Example 2 and Comparative Example 2, under the assumption that the lens ball is attached to the frame, the spherical power and astigmatism power were measured using measuring equipment conforming to ISO standards at a position 10 mm inward from the center of the lens along the horizontal axis (see P1 in Figure 6(B)) and at a position 18 mm inward from the center of the lens along the horizontal axis (see P2 in Figure 6(B)).
　実施例３及び比較例３の偏光レンズについて、レンズ玉をフレームに装着した想定の条件で、レンズ中心から横軸の方向に沿って内側に１０ｍｍ離れた位置（図６（Ｂ）のＰ１を参照）と、レンズ中心から横軸の方向に沿って内側に２１ｍｍ離れた位置（図６（Ｂ）のＰ２を参照）における球面度数及び非点収差度数をＩＳＯ規格に準ずる測定機器を用いて測定した。 For the polarized lenses of Example 3 and Comparative Example 3, under the assumption that the lens ball is attached to a frame, the spherical power and astigmatism power were measured using a measuring device conforming to ISO standards at a position 10 mm inward from the center of the lens along the horizontal axis (see P1 in Figure 6(B)) and at a position 21 mm inward from the center of the lens along the horizontal axis (see P2 in Figure 6(B)).
　これらの測定結果を表４から表６に示す。なお、合否はＩＳＯ規格の合格基準に基づき判定した。 These measurement results are shown in Tables 4 to 6. Pass/fail was determined based on the ISO standard pass criteria.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000005
Figure JPOXMLDOC01-appb-T000006
Figure JPOXMLDOC01-appb-T000006
　表４から表６によれば、本開示の非球面に湾曲した実施例１－３の偏光レンズは、アイポイント想定領域の球面度数が±０．１２の範囲内にあり、ＩＳＯ規格の合格基準をクリアできるのに対して、単なる球面状に湾曲した比較例１－３の偏光レンズは、アイポイント想定領域の球面度数が±０．１２の範囲外にあり、ＩＳＯ規格の合格基準をクリアできないことが確認された。 Tables 4 to 6 show that the aspherically curved polarized lenses of Examples 1-3 of the present disclosure have a spherical power in the expected eyepoint area that is within the range of ±0.12 and meets the ISO standard passing criteria, whereas the simply spherically curved polarized lenses of Comparative Examples 1-3 have a spherical power in the expected eyepoint area that is outside the range of ±0.12 and cannot meet the ISO standard passing criteria.
　さらに、実施例１－３及び比較例１－３の偏光レンズについて、レンズ中心の位置における球面度数及び非点収差度数を測定した結果を表７に示す。 Furthermore, the results of measuring the spherical power and astigmatism power at the lens center position for the polarized lenses of Examples 1-3 and Comparative Examples 1-3 are shown in Table 7.
Figure JPOXMLDOC01-appb-T000007
Figure JPOXMLDOC01-appb-T000007
　本開示の非球面に湾曲した実施例１－３の偏光レンズは、レンズ中心の球面度数も±０．１２の範囲内にあり、ＩＳＯ規格の合格基準をクリアできるのに対して、単なる球面状に湾曲した比較例１－３の偏光レンズは、レンズ中心の球面度数も±０．１２の範囲外にあり、ＩＳＯ規格の合格基準をクリアできないことが確認された。 The aspherically curved polarized lenses of Examples 1-3 of the present disclosure have spherical powers at the lens center within the range of ±0.12, which meets the ISO standard passing criteria, whereas the simply spherically curved polarized lenses of Comparative Examples 1-3 have spherical powers at the lens center outside the range of ±0.12, which is confirmed to be unable to meet the ISO standard passing criteria.
　次に偏光レンズを実際に眼鏡フレームのリムの形状にカットしてリムに装着し、眼鏡フレームのアイポイント位置における球面度数及び非点収差度数をＩＳＯ規格に準ずる測定機器を用いて測定した。 Next, the polarized lens was actually cut to the shape of the rim of the eyeglass frame and attached to the rim, and the spherical power and astigmatism power at the eye point position of the eyeglass frame were measured using measuring equipment conforming to ISO standards.
　偏光レンズは、偏光膜の両面に厚み０．５ｍｍのポリカーボネート製の支持板がそれぞれ積層された厚み１．１ｍｍの積層板を曲げ加工により非球面状に湾曲させたものである。偏光レンズの大きさは横軸の方向の長さが８０ｍｍ、縦軸の方向の長さが６０ｍｍである。図２に示すように、偏光レンズは、レンズ中心を境にして内側領域と外側領域とに分けられている。また、内側領域は、縦軸の方向に沿って偏光レンズの上縁から下縁の間において内側第三領域、内側第二領域、内側第一領域、内側第二領域、内側第三領域に分けられ、それぞれの縦軸の方向の長さは、１０ｍｍ、１０ｍｍ、２０ｍｍ、１０ｍｍ、１０ｍｍである。外側領域は、中央領域及び側方領域に分けられ、それぞれの横軸の方向の長さは、２０ｍｍ、２０ｍｍである。また、中央領域は、縦軸の方向に沿って上縁から下縁の間において中央第二領域、中央第一領域、中央第二領域に分けられ、それぞれの縦軸の方向の長さは、２０ｍｍ、２０ｍｍ、２０ｍｍである。アイポイント想定領域は、内側領域において、直径２０ｍｍの仮想円を、該仮想円の中心がレンズ中心から横軸の方向に１０ｍｍ離れた位置から２１ｍｍ離れた位置まで到達するよう前記仮想円を移動させることでできる仮想領域としており、内側第一領域に含まれている。 The polarized lens is a 1.1 mm thick laminated plate, with 0.5 mm thick polycarbonate support plates laminated on both sides of the polarizing film, which is then bent into an aspheric shape by bending. The size of the polarized lens is 80 mm in the horizontal direction and 60 mm in the vertical direction. As shown in Figure 2, the polarized lens is divided into an inner region and an outer region, with the center of the lens as the boundary. The inner region is also divided into an inner third region, an inner second region, an inner first region, an inner second region, and an inner third region along the vertical axis between the upper and lower edges of the polarized lens, with the lengths of the respective regions along the vertical axis being 10 mm, 10 mm, 20 mm, 10 mm, and 10 mm. The outer region is divided into a central region and a side region, with the lengths of the respective regions along the horizontal axis being 20 mm and 20 mm. The central region is divided into a central second region, a central first region, and a central second region between the upper edge and the lower edge along the vertical axis, and the lengths of these regions along the vertical axis are 20 mm, 20 mm, and 20 mm, respectively. The eyepoint assumed region is a virtual region in the inner region that is created by moving a virtual circle with a diameter of 20 mm so that the center of the virtual circle reaches a position 10 mm away from the center of the lens in the horizontal axis direction to a position 21 mm away, and is included in the inner first region.
　眼鏡フレームのリムに装着する前の偏光レンズの球面度数及び非点収差度数は以下の表８のとおりであり、アイポイント想定領域（レンズ中心より８ｍｍから２１ｍｍ内側に離れた位置）の球面度数が±０．１２の範囲内である。 The spherical power and astigmatism power of the polarized lens before it is attached to the rim of the eyeglass frame are as shown in Table 8 below, and the spherical power in the expected eyepoint area (a position 8 mm to 21 mm inward from the center of the lens) is within the range of ±0.12.
Figure JPOXMLDOC01-appb-T000008
Figure JPOXMLDOC01-appb-T000008
　偏光レンズは、図７に示すように、レンズ中心が眼鏡フレームのリムの中心に一致するとともにリムの形状に合うようにエッジングカットを行い、カット後に眼鏡フレームのリムに装着した。眼鏡フレームは、一般的な形状及び大きさである以下の実施例４－９の眼鏡フレームを用いた。眼鏡フレームのアイポイントは、人の瞳孔間距離を６４ｍｍとして、ブリッジの中心から外側に３２ｍｍ離れた位置となる。 As shown in Figure 7, the polarized lens was edge-cut so that the lens center coincided with the center of the rim of the eyeglass frame and matched the shape of the rim, and after cutting, it was attached to the rim of the eyeglass frame. The eyeglass frame used was the eyeglass frame of Example 4-9 below, which has a general shape and size. The eye point of the eyeglass frame is located 32 mm outward from the center of the bridge, assuming a human interpupillary distance of 64 mm.
（１）実施例４（Oakley社製の眼鏡フレーム）
・ブリッジの横幅：２０ｍｍ
・リムの横幅：６０ｍｍ
・テンプル傾斜：前傾斜５°
・リム傾斜：前傾斜１６°　水平傾斜２５°
・リムカーブ：約７Ｒ
・アイポイント位置：リムの中心（レンズ中心）から８ｍｍ内側に離れた位置
（２）実施例５（CARRERA社製の眼鏡フレーム）
・ブリッジの横幅：２０ｍｍ
・リムの横幅：６２ｍｍ
・テンプル傾斜：前傾斜８°
・リム傾斜：前傾斜１６°　水平傾斜２５°
・リムカーブ：約６．５Ｒ
・アイポイント位置：リムの中心（レンズ中心）から９ｍｍ内側に離れた位置
（３）実施例６（SUNTVER社製の眼鏡フレーム）
・ブリッジの横幅：２０ｍｍ
・リムの横幅：６０ｍｍ
・テンプル傾斜：前傾斜４°
・リム傾斜：前傾斜１５°　水平傾斜２８°
・リムカーブ：約７Ｒ
・アイポイント位置：リムの中心（レンズ中心）から８ｍｍ内側に離れた位置
（４）実施例７（ハート光学社製の眼鏡フレーム）
・ブリッジの横幅：２２ｍｍ
・リムの横幅：６２ｍｍ
・テンプル傾斜：前傾斜３°
・リム傾斜：前傾斜１６°　水平傾斜２５°
・リムカーブ：約７Ｒ
・アイポイント位置：リムの中心（レンズ中心）から１０ｍｍ内側に離れた位置
（５）実施例８（CLEAR LAKE社製の眼鏡フレーム）
・ブリッジの横幅：２２ｍｍ
・リムの横幅：６２ｍｍ
・テンプル傾斜：前傾斜７°
・リム傾斜：前傾斜１８°　水平傾斜２６°
・リムカーブ：約７Ｒ
・アイポイント位置：リムの中心（レンズ中心）から１０ｍｍ内側に離れた位置
（６）実施例９（Timberland社製の眼鏡フレーム）
・ブリッジの横幅：２１ｍｍ
・リムの横幅：５９ｍｍ
・テンプル傾斜：前傾斜１°
・リム傾斜：前傾斜１６°　水平傾斜２６°
・リムカーブ：約７Ｒ
・アイポイント位置：リムの中心（レンズ中心）から８ｍｍ内側に離れた位置 (1) Example 4 (Oakley eyeglass frame)
・Bridge width: 20mm
- Rim width: 60mm
Temple inclination: 5° forward inclination
Rim inclination: Front inclination 16° Horizontal inclination 25°
- Rim curve: approx. 7R
Eye point position: 8 mm inward from the center of the rim (center of the lens) (2) Example 5 (Carrera eyeglass frame)
・Bridge width: 20mm
- Rim width: 62mm
Temple inclination: forward inclination 8°
Rim inclination: Front inclination 16° Horizontal inclination 25°
- Rim curve: approx. 6.5R
Eye point position: 9 mm inward from the center of the rim (center of the lens) (3) Example 6 (Suntver eyeglass frame)
・Bridge width: 20mm
- Rim width: 60mm
Temple inclination: 4° forward inclination
Rim inclination: Front inclination 15° Horizontal inclination 28°
- Rim curve: approx. 7R
Eye point position: 8 mm inward from the center of the rim (center of the lens) (4) Example 7 (eyeglass frame manufactured by Hart Optical Co., Ltd.)
Bridge width: 22mm
- Rim width: 62mm
Temple inclination: forward inclination 3°
Rim inclination: Front inclination 16° Horizontal inclination 25°
- Rim curve: approx. 7R
Eye point position: 10 mm inward from the center of the rim (center of the lens) (5) Example 8 (eyeglass frame manufactured by CLEAR LAKE)
Bridge width: 22mm
- Rim width: 62mm
Temple inclination: forward inclination 7°
Rim inclination: Front inclination 18° Horizontal inclination 26°
- Rim curve: approx. 7R
Eye point position: 10 mm inward from the center of the rim (center of the lens) (6) Example 9 (Timberland eyeglass frame)
Bridge width: 21mm
- Rim width: 59mm
Temple inclination: forward inclination 1°
Rim inclination: Front inclination 16° Horizontal inclination 26°
- Rim curve: approx. 7R
Eye point position: 8 mm inward from the center of the rim (center of the lens)
　実施例４－９について、アイポイント位置、及び、リムの中心（レンズ中心）から２１ｍｍ内側に離れた位置において測定した球面度数及び非点収差度数の結果を表９に示す。 For Examples 4-9, the results of the spherical power and astigmatism power measured at the eye point position and at a position 21 mm inward from the center of the rim (center of the lens) are shown in Table 9.
Figure JPOXMLDOC01-appb-T000009
Figure JPOXMLDOC01-appb-T000009
　偏光レンズについてアイポイント想定領域をレンズ中心から内側に８ｍｍから２１ｍｍの範囲に定めることで、偏光レンズを一般的な形状及び大きさの眼鏡フレームのリムの形状に合わせてカットしてリムに装着した際に、眼鏡フレームの実際のアイポイントがアイポイント想定領域と一致し、アイポイント位置の球面度数が±０．１２の範囲内となって、ＩＳＯ規格の合格基準をクリアできることが確認された。よって、本発明の偏光レンズによれば、眼に対する悪影響を抑制することができることが分かる。 It has been confirmed that by defining the expected eyepoint area for a polarized lens to be within a range of 8mm to 21mm inward from the center of the lens, when the polarized lens is cut to fit the shape of the rim of a typical eyeglass frame of a typical shape and size and attached to the rim, the actual eyepoint of the eyeglass frame coincides with the expected eyepoint area, and the spherical power at the eyepoint position is within a range of ±0.12, clearing the ISO standard passing criteria. It can therefore be seen that the polarized lens of the present invention can suppress adverse effects on the eyes.
　１　　　偏光レンズ
　２　　　内側領域
　３　　　外側領域
　４　　　アイポイント想定領域
　１０Ａ　凸面
　１０Ｂ　凹面
　２０　　内側第一領域
　２１　　内側第二領域
　２２　　内側第三領域
　３０　　中央領域
　３１　　側方領域
　３００　中央第一領域
　３０１　中央第二領域
　Ｃ　　　レンズ中心
　Ｘ　　　横軸
　Ｙ　　　縦軸 REFERENCE SIGNS LIST 1 Polarizing lens 2 Inner region 3 Outer region 4 Eye point assumed region 10A Convex surface 10B Concave surface 20 Inner first region 21 Inner second region 22 Inner third region 30 Central region 31 Side region 300 Central first region 301 Central second region C Lens center X Horizontal axis Y Vertical axis

Claims (9)

  1. 　表側が凸面、裏側が凹面となるよう湾曲する単眼用の偏光レンズであって、
    　横軸と縦軸との交点であるレンズ中心よりも内側領域における少なくともアイポイント領域の前記横軸の方向に沿う曲がり度合及び前記縦軸の方向に沿う曲がり度合が、前記レンズ中心よりも外側領域の前記横軸の方向に沿う曲がり度合及び前記縦軸の方向に沿う曲がり度合より小さく、
    　前記アイポイント想定領域は、前記内側領域において、直径２０ｍｍの仮想円を、該仮想円の中心が前記レンズ中心から前記横軸の方向に第一距離ｄ１離れた位置から第二距離ｄ２離れた位置まで到達するように移動させることでできる仮想領域であり、
    　前記第一距離Ｄ１は８ｍｍ以上１１ｍｍ以下であり、前記第二距離Ｄ２は１８ｍｍ以上２１ｍｍ以下であり、
    　前記アイポイント想定領域の球面度数が－０．１２以上＋０．１２以下である、偏光レンズ。     A polarized lens for single-lens use that is curved so that the front side is convex and the back side is concave,
    the degree of curvature along the horizontal axis and the degree of curvature along the vertical axis of at least the eye point region in a region inside the lens center, which is the intersection of the horizontal axis and the vertical axis, is smaller than the degree of curvature along the horizontal axis and the degree of curvature along the vertical axis of a region outside the lens center,
    the assumed eyepoint region is a virtual region that can be obtained by moving a virtual circle having a diameter of 20 mm in the inner region so that the center of the virtual circle reaches a position that is a first distance d1 away from the lens center in the direction of the horizontal axis to a position that is a second distance d2 away from the lens center,
    The first distance D1 is equal to or greater than 8 mm and equal to or less than 11 mm, and the second distance D2 is equal to or greater than 18 mm and equal to or less than 21 mm.
    A polarizing lens in which the spherical power of the assumed eye point area is −0.12 or more and +0.12 or less.
  2. 　前記外側領域は、前記横軸の方向に沿って、前記レンズ中心側の中央領域及び該偏光レンズの外縁側の側方領域に分けられており、
    　前記中央領域の前記横軸の方向に沿う曲がり度合は、前記側方領域の前記横軸の方向に沿う曲がり度合より小さい、請求項１に記載の偏光レンズ。     The outer region is divided along the horizontal axis into a central region on the lens center side and a side region on the outer edge side of the polarizing lens,
    2. The polarized lens of claim 1, wherein the degree of curvature of the central region along the direction of the horizontal axis is less than the degree of curvature of the side regions along the direction of the horizontal axis.
  3. 　前記内側領域は、前記横軸から該偏光レンズの上縁及び下縁のそれぞれの方に向かって、内側第一領域、内側第二領域及び内側第三領域に分かれており、
    　前記内側第一領域、前記内側第二領域及び前記内側第三領域の順で前記縦軸の方向に沿う曲がり度合が大きく、
    　前記内側第一領域に前記アイポイント想定領域が含まれる、請求項１に記載の偏光レンズ。     The inner region is divided into an inner first region, an inner second region, and an inner third region from the horizontal axis toward each of the upper and lower edges of the polarized lens,
    the degree of bending along the longitudinal axis direction increases in the order of the inner first region, the inner second region, and the inner third region;
    The polarized lens according to claim 1 , wherein the inner first region includes the eye point assumed region.
  4. 　前記内側第一領域の前記縦軸の方向に沿う曲がり度合と、前記内側領域の前記横軸の方向に沿う曲がり度合とが等しい値である、請求項３に記載の偏光レンズ。 The polarized lens of claim 3, wherein the degree of curvature of the first inner region along the vertical axis is equal to the degree of curvature of the inner region along the horizontal axis.
  5. 　前記中央領域は、前記横軸から該偏光レンズの上縁及び下縁のそれぞれの方に向かって、中央第一領域及び中央第二領域に分けられており、
    　前記中央第二領域の前記縦軸の方向に沿う曲がり度合は、前記中央第一領域の前記縦軸の方向に沿う曲がり度合より大きい、請求項２に記載の偏光レンズ。     The central region is divided into a central first region and a central second region from the horizontal axis toward the upper edge and the lower edge of the polarized lens, respectively;
    3. The polarized lens of claim 2, wherein the degree of curvature of the central second region along the direction of the longitudinal axis is greater than the degree of curvature of the central first region along the direction of the longitudinal axis.
  6. 　前記側方領域の前記横軸の方向に沿う曲がり度合と、前記側方領域の前記縦軸の方向に沿う曲がり度合とが等しい値である、請求項２に記載の偏光レンズ。 The polarized lens of claim 2, wherein the degree of curvature of the side region along the horizontal axis is equal to the degree of curvature of the side region along the vertical axis.
  7. 　前記アイポイント想定領域の非点収差度数が０．１２以下である、請求項１に記載の偏光レンズ。 The polarized lens according to claim 1, wherein the astigmatism power of the assumed eyepoint area is 0.12 or less.
  8. 　請求項１から７のいずれか一項に記載の偏光レンズであって、
    　該偏光レンズは、偏光膜の両面にポリカーボネート製の支持板が積層された積層板により構成されており、
    　該偏光レンズの厚みが０．９ｍｍであり、
    　前記アイポント想定領域の前記横軸の方向に沿う曲がり度合及び前記縦軸の方向に沿う曲がり度合がともに６Ｒ以下であり、
    　前記側方領域の前記横軸の方向に沿う曲がり度合及び前記縦軸の方向に沿う曲がり度合がともに８Ｒである、偏光レンズ。     8. The polarized lens according to claim 1 ,
    The polarizing lens is composed of a laminate in which polycarbonate support plates are laminated on both sides of a polarizing film,
    The thickness of the polarized lens is 0.9 mm,
    The degree of curvature of the estimated point area along the horizontal axis and the degree of curvature of the estimated point area along the vertical axis are both 6R or less,
    A polarized lens, wherein the degree of curvature of the side regions along the horizontal axis and the degree of curvature along the vertical axis are both 8R.
  9. 　請求項１から７のいずれか一項に記載の偏光レンズであって、
    　該偏光レンズは、偏光膜の両面にポリカーボネート製の支持板が積層された積層板により構成されており、
    　該偏光レンズの厚みが１．５ｍｍであり、
    　前記アイポント想定領域の前記横軸の方向に沿う曲がり度合及び前記縦軸の方向に沿う曲がり度合がともに５Ｒ以下であり、
    　前記側方領域の前記横軸の方向に沿う曲がり度合及び前記縦軸の方向に沿う曲がり度合がともに６Ｒである、偏光レンズ。     8. The polarized lens according to claim 1 ,
    The polarizing lens is composed of a laminate in which polycarbonate support plates are laminated on both sides of a polarizing film,
    The thickness of the polarized lens is 1.5 mm,
    The degree of curvature of the estimated point area along the horizontal axis and the degree of curvature of the estimated point area along the vertical axis are both 5R or less,
    A polarizing lens, wherein the degree of curvature of the side regions along the horizontal axis and the degree of curvature along the vertical axis are both 6R.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000171761A (en) * 1998-12-07 2000-06-23 Wintec International Japan:Kk Polarizing lens for sunglasses and production therefor as well as apparatus for production therefor
JP2006047586A (en) * 2004-08-03 2006-02-16 Wintec International Japan:Kk Polarizing sheet for polarizing plastic lens with power, method for manufacturing the polarizing sheet, apparatus for manufacturing the polarizing sheet, and polarizing plastic lens with power
JP2006301553A (en) * 2005-03-25 2006-11-02 Optical Ventures Inc Lens for sunglasses, and method and apparatus for manufacturing same
JP2011180265A (en) * 2010-02-26 2011-09-15 Yamamoto Kogaku Co Ltd Single-lens type polarizing glasses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000171761A (en) * 1998-12-07 2000-06-23 Wintec International Japan:Kk Polarizing lens for sunglasses and production therefor as well as apparatus for production therefor
JP2006047586A (en) * 2004-08-03 2006-02-16 Wintec International Japan:Kk Polarizing sheet for polarizing plastic lens with power, method for manufacturing the polarizing sheet, apparatus for manufacturing the polarizing sheet, and polarizing plastic lens with power
JP2006301553A (en) * 2005-03-25 2006-11-02 Optical Ventures Inc Lens for sunglasses, and method and apparatus for manufacturing same
JP2011180265A (en) * 2010-02-26 2011-09-15 Yamamoto Kogaku Co Ltd Single-lens type polarizing glasses

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