Method of manufacturing polarizing plastic lens, including an upper mold positioning step of positioning an upper mold so that a nonmolding surface faces up and a molding surface faces down, an adhesive column forming step of discharging a thixotropic curable adhesive from a nozzle beneath the upper mold to form adhesive columns on the molding surface of the upper mold, a step of bonding the upper mold and a polarizing film, an adhesive column curing step of subjecting the adhesive columns to a curing treatment, a casting mold assembling step of assembling a casting mold having a cavity within which the polarizing film has been positioned with the upper mold to which the polarizing film has been bonded, a lower mold positioned opposite the upper mold so as to sandwich the polarizing film, and a sealing member maintaining a spacing between the upper mold and lower mold, and a polymerizing and curing step of casting a curable composition into the cavity, and polymerizing and curing the curable composition that has been cast to provide a polarizing plastic lens within which the polarizing film is positioned.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 39/10 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
An aspect of the present invention relates to a method of manufacturing a polarizing plastic lens, which comprises a reversing step of reversing a convex surface shape into a concave surface shape by pressing a polarizing film that has been curved surface processed, a casting mold assembling step of assembling a casting mold having a cavity within which the reversed polarizing film is positioned with the reversed polarizing film, an upper mold, a lower mold, and a sealing member that maintains a spacing between the upper mold and the lower mold, and a polymerizing and curing step of casting a curable composition into the cavity, and polymerizing and curing the curable composition that has been cast to provide a polarizing plastic lens within which a polarizing film is positioned.
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
B29C 39/10 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
B29K 29/00 - Use of polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals as moulding material
B29K 105/00 - Condition, form or state of moulded material
3.
Polarized plastic lens for spectacles and method for manufacturing polarized plastic lens for spectacles
There is provided a polarized plastic lens for spectacles configured to be thin having almost the same thickness as the thickness of a normal plastic lens for spectacles, and a method for manufacturing the polarized plastic lens for spectacles, the plastic lens including a first lens base material having an object-side surface; a second lens base material having an eyeball-side surface; and a polarized film provided between the first lens base material and the second lens base material so that a minimum value of a distance between the polarized film and the object-side surface is 0.3 mm or more and 0.7 mm or less.
There is provided a progressive addition lens for spectacles including a distance portion and a near portion having different powers, wherein an equivalent spherical power of the distance portion is plus; and a first lens and a second lens having different addition powers from each other, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the first lens, and a difference between vertical surface power in the distance portion and vertical surface power in the near portion on an object-side surface of the second lens are the same.
The invention relates to a method of manufacturing a polarizing lens, including conducting curved surface processing to change a shape of a polarizing film into a shape of a curved surface, conducting heat treatment by heating polarizing film that has been processed into a curved surface to a heating temperature of equal to or higher than 105° C. but less than 150° C., assembling an upper mold, a lower mold, and a seal member to provide a casting mold having a cavity within which the polarizing film following heating treatment is positioned, upper and lower molds being positioned opposite each other to sandwich the polarizing film at a space therebetween, and seal member sealing space between the upper and lower molds, casting a curable composition into the cavity, curing curable composition to provide a polarizing lens within which a polarizing film is positioned, and separating polarizing lens thus provided from casting mold.
B29C 39/10 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
B29D 11/00 - Producing optical elements, e.g. lenses or prisms
There is provided a progressive addition lens capable of improving both of astigmatism and power error on a peripheral part of a distance area, including a distance area used for a distance vision, and other area different from the distance area, wherein at least one of an eyeball side surface of a wearer and an object side surface in the progressive addition lens is formed into an aspheric form, and when a prescription value T to be obtained from formula “S+C/2” expressed by a prescribed spherical power S and a cylindrical power C, is minus, the area where a power deviation ΔD of a spherical equivalent power D from the prescription value T goes negative, exists on principal sight line in the distance area.
An embodiment of the present invention relates to a coating composition comprising an epoxy-group-containing compound, an acetylacetonate having iron as the central metal and an acetylacetonate having aluminum as the central metal, wherein the ratio (mF) of the number of moles of the acetylacetonate having iron as the central metal to the number of moles of an epoxy group contained in the epoxy-group-containing compound and the ratio (mA) of the number of moles of the acetylacetonate having aluminum as the central metal to the number of moles of an epoxy group contained in the epoxy-group-containing compound satisfy the requirements represented by the following formulae: 0.000 < mF/mA ≤ 1.000; and 0.0064 ≤ (mF+mA) ≤ 0.0253.
μL1<μL2
wherein μL1 denotes a coefficient of static friction of a surface of the first antifouling layer, and μL2 denotes a coefficient of static friction of a surface of the second antifouling layer.
An embodiment of the present invention pertains to a method for manufacturing a polarizing plastic lens, the method including: an inversion step for inverting the shape of a polarizing film processed to have a curved surface from a convexly curved shape to a concavely curved shape by pressing the film; a forming die assembly step for assembling a forming die having the inverted polarizing film disposed inside a cavity by using the inverted polarizing film, an upper mold, a lower mold and a sealing member for maintaining a s pace between the upper mold and the lower mold; and a polymerization curing step for injecting a curable composition into the cavity and curing the injected curable composition by polymerization to obtain a polarizing plastic lens having the polarizing film disposed in the interior thereof.
B29C 39/10 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
The present invention pertains to a method for manufacturing a polarizing plastic lens, said method including the following steps: a step in which an upper mold is laid out with a non-molding surface thereof facing up and a molding surface thereof facing down; a step in which a discharge nozzle mounted below the molding surface of the upper mold discharges a thixotropic curable adhesive agent so as to form adhesive-agent columns along the edge of said molding surface; a step in which, after a step in which the formed adhesive-agent columns are used to bond a polarizing film to the upper mold, the adhesive-agent columns are subjected to a curing process; a step in which the upper mold with the polarizing film bonded thereto, a lower mold positioned opposite the upper mold with the polarizing film interposed therebetween, and a sealing member that maintains a separation between the upper and lower molds are used to assemble an assembled mold that has a cavity inside which the polarizing film is disposed; and a step in which a curable composition is injected into said cavity and cured via polymerization, yielding a polarizing plastic lens inside which a polarizing film is disposed.
B29C 39/10 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
An optical lens including, an object-side surface including an atoric surface element and an eyeball-side surface including an element that cancels a surface power shift produced by the atoric surface element, wherein the atoric surface element causes horizontal surface power at a fitting point to be greater than vertical surface power at the fitting point and causes a difference between the horizontal surface power and the vertical surface power to decrease along a horizontal reference line passing through the fitting point in a direction from the fitting point toward a periphery of the optical lens or causes a sign of the difference between the horizontal surface power and the vertical surface power to change along the horizontal reference line.
A method of designing a progressive power lens with less image sway includes preferentially selecting a spectacle specification including a first condition if an average prescription power of a distance portion is equal to or greater than +3.0 D, and preferentially selecting a spectacle specification including a second condition if the average prescription power is equal to or smaller than −3.0 D. At least a surface power OHPf in a horizontal direction of a distance portion on an object-side surface is greater than a surface power OVPf in a vertical direction, or a surface power OHPn in a horizontal direction of a near portion is greater than a surface power OVPn in a vertical direction. The first condition includes a condition that the OVPf is greater than the OVPn, and the second condition includes a condition that the OVPf is smaller than the OVPn.
An eye-side refractive surface 11 of a distance portion is concave and at least part of an eye-side refractive surface 3 of a near portion is a convex region 31 where one or both of principal meridians of the surface are convex. This provides a back surface progressive-power lens capable of solving disadvantages in terms of lens thickness, external appearance and the like in a back surface progressive-power lens in which the eye-side refractive surface is formed of a progressive-power surface.
patents
