Plastic lens systems, compositions, and methods
First Claim
Patent Images
1. A method for making a plastic eyeglass lens, comprising:
- placing a liquid lens forming composition in a mold cavity of a mold assembly, wherein the mold assembly comprises a front mold member and a back mold member, the lens forming composition comprising;
a monomer composition comprising an aromatic containing polyether polyethylenic functional monomer;
a co-initiator composition, the co-initiator composition comprising an amine; and
a photoinitiator; and
directing activating light toward at least one of the mold members to initiate curing of the lens forming composition; and
directing activating light and heat toward at least one of the mold members subsequent to initiating curing of the lens to form the eyeglass lens.
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Abstract
An apparatus for preparing a plastic eyeglass lens includes a coating unit and a lens curing unit. The apparatus is preferably configured to allow the operation of both the coating unit and the lens curing unit. The apparatus may also include a post-cure unit and a controller. The controller is configured to control the operation of the coating unit, the lens curing unit and the post-cure unit. A lens forming composition may include an aromatic containing polyether polyethylenic functional monomer, a photoinitiator, and a coinitiator. The lens forming composition may be cured by the application of activating light or activating light and heat.
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Citations
75 Claims
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1. A method for making a plastic eyeglass lens, comprising:
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placing a liquid lens forming composition in a mold cavity of a mold assembly, wherein the mold assembly comprises a front mold member and a back mold member, the lens forming composition comprising;
a monomer composition comprising an aromatic containing polyether polyethylenic functional monomer;
a co-initiator composition, the co-initiator composition comprising an amine; and
a photoinitiator; and
directing activating light toward at least one of the mold members to initiate curing of the lens forming composition; and
directing activating light and heat toward at least one of the mold members subsequent to initiating curing of the lens to form the eyeglass lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for making a plastic eyeglass lens, comprising:
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placing a liquid lens forming composition in a mold cavity defined by at least a front mold member and a back mold member, the lens forming composition comprising;
a monomer composition comprising an aromatic containing polyether polyethylenic functional monomer;
a co-initiator composition, the co-initiator composition comprising an amine; and
a photoinitiator; and
substantially simultaneously directing light toward at least one of the mold members and heat toward both of the mold members to form the eyeglass lens. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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55. A method for making a flat-top bifocal eyeglass lens, the flat top bifocal eyeglass lens comprising a near vision correction zone and a far vision correction zone, comprising:
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placing a liquid lens forming composition in a mold cavity of a mold assembly, wherein the mold assembly comprises a front mold member and a back mold member, the front mold member comprising a near vision correction zone;
directing activating light toward at least one of the mold members to initiate curing of the lens forming composition, wherein the curing is initiated such that the lens forming composition in the near vision correction zone of the front mold is substantially gelled before the lens forming composition in the far vision correction zone proximate the front mold member is substantially gelled; and
directing activating light and heat toward at least one of the mold members subsequent to initiating curing of the lens to form the eyeglass lens. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
a monomer composition comprising an aromatic containing polyether polyethylenic functional monomer;
a co-initiator composition, wherein the co-initiator composition activates curing of the monomer composition to form the eyeglass lens during curing of the lens forming composition, the co-initiator composition comprising an amine; and
a photoinitiator, wherein the photoinitiator activates the co-initiator composition in response to being exposed to activating light during curing of the lens forming composition.
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59. The method of claim 58, wherein the aromatic containing polyethylenic polyether functional monomer comprises an ethoxylated bisphenol A containing at least one group selected from acrylyl or methacrylyl.
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60. The method of claim 58, wherein the co-initiator composition comprises an acrylyl amine.
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61. The method of claim 60, wherein the co-initiator composition comprises an acrylyl amine, wherein the acrylyl amine is selected from the group consisting of monoacrylated amines, diacrylated amines, or mixtures thereof.
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62. The method of claim 58, wherein the lens forming composition further comprises a photochromic compound.
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63. The method of claim 58, wherein the lens forming composition further comprises an ultraviolet absorbing compound for inhibiting at least a portion of ultraviolet light from being transmitted through the eyeglass lens during use.
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64. The method of claim 55, wherein curing of the lens forming composition is initiated by directing activating light toward at least one of the mold members for less than 30 seconds.
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65. The method of claim 55, wherein curing of the lens forming composition is initiated by directing activating light toward at least one of the mold members for less than 100 seconds.
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66. The method of claim 55, wherein curing of the lens forming composition is initiated by directing activating light toward both of the mold members.
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67. The method of claim 55, wherein curing of the lens forming composition is initiated by directing activating light toward the bottom mold member.
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68. The method of claim 55, wherein treating the lens forming composition with activating light and heat comprises directing activating light toward at least one of the mold members and applying heat to both mold members for a time of up to about 15 minutes.
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69. The method of claim 55, further comprising applying heat to the lens in the absence of activating light, subsequent to directing activating light and heat toward at least one of the mold members.
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70. The method of claim 55, further comprising heating the lens forming composition prior to placing the lens forming composition in a mold cavity.
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71. The method of claim 55, further comprising removing the eyeglass lens from the mold cavity and applying an abrasion resistant coating to a front surface of the eyeglass lens.
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72. The method of claim 55, further comprising removing the eyeglass lens from the mold cavity and tinting the eyeglass lens.
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73. The method of claim 55, wherein the lens forming composition exhibits a yellow color after the curing is initiated, and wherein activating light and heat are directed toward the lens until the lens forming composition is substantially free of the yellow color.
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74. The method of claim 55, wherein directing activating light toward at least one of the mold members to initiate curing is performed in a curing chamber, and wherein directing activating light and heat toward at least one of the mold members subsequent to initiating curing is performed in a post-cure chamber, and further comprising transferring the mold assembly to the post-cure chamber after the curing is initiated in the curing chamber.
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75. The method of claim 55, wherein directing activating light toward at least one of the mold members is preformed without cooling of the mold assembly.
Specification