CN101443181B - 将分层结构贴覆在镜片上的方法 - Google Patents

将分层结构贴覆在镜片上的方法 Download PDF

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CN101443181B
CN101443181B CN200680054618XA CN200680054618A CN101443181B CN 101443181 B CN101443181 B CN 101443181B CN 200680054618X A CN200680054618X A CN 200680054618XA CN 200680054618 A CN200680054618 A CN 200680054618A CN 101443181 B CN101443181 B CN 101443181B
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hierarchy
curvature
lens surface
lens
eyeglass
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CN101443181A (zh
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约翰·比托
约瑟夫·博里斯拉斯基
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EssilorLuxottica SA
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Abstract

本发明涉及将分层结构(1)贴覆到镜片(10)的凸面上的一种改进方法。在分层结构被热力成形后，分层结构的曲率方向被翻转。从而，从该结构的凸面和该镜片的凸面间的接触点开始，通过将结构(1)连续推动紧贴镜片表面，该结构被贴覆到镜片表面上。分层结构的曲率方向之后被再次翻转，从而使其恢复到热力成形所产生的曲率方向。因此，所述分层结构中的应力减少，并且该结构可以与所述镜片装配在一起而不产生缺陷。

Description

将分层结构贴覆在镜片上的方法
发明领域
本发明涉及将分层结构贴覆(apply)在镜片凸面上的方法。特别地，该方法可以被用于眼镜片。
背景技术
将镜片与该镜片表面上的薄膜装配在一起通常有益于以此获得具有所需特性的最终镜片。举例来说，该薄膜可以是偏振膜、对比度增强膜、感光膜等等。因为镜片的表面是弯曲的，所以当薄膜具有平面形状时，其不能被直接贴覆到镜片上。甚至，由于薄膜和镜片表面间的曲率不同，分层、裂缝和/或褶皱会随之产生。因此，预先加工薄膜是十分必要的，这可以使得薄膜在被贴覆到镜片表面上之前具有初始曲率。
具有弯曲形状的分层结构同样是已知的，从而分层结构具有凹入的第一表面和凸出的第二表面。因而，分层结构的第一表面在初始接触点处被用来与镜片表面接触，优选地，是在镜片表面的中间部分。从初始接触点开始，分层结构的第一表面通过施加在分层结构第二表面上的压力推抵镜片表面。分层结构第一表面和镜片表面间的接触随着压力的增加而连续径向扩展。在已知的此种方法的实施方式中，在被贴覆于镜片上的期间，分层结构的外围边缘被固定住，并且该结构由弹性垫推抵镜片。
但是，尽管分层结构最初具有弯曲的形状，装配有分层结构的镜片会在镜片的外围部分附近的结构中显出褶皱，或是在镜片中间部分中的分层结构中显出裂缝。特别地，当镜片表面的曲率半径较小，尤其是小于75mm(毫米)时，这些缺陷就会出现。
发明内容
本发明的一个目的是改进上述这类方法，使得装配有分层结构的最终镜片不会显出缺陷。
为此，本发明提出了一种将分层结构贴覆到镜片凸面上的方法，其包括以下步骤：
/a/提供具有平面形状的分层结构；
/b/将分层结构热力成形，从而使其弯曲并具有凹入的第一表面和凸起的第二表面；
/c/将分层结构的曲率翻转(invert)，从而使得所述第一表面翻转成凸面，所述第二表面翻转成凹面；
/d/在初始接触点处将分层结构的第一表面与镜片表面接触；以及
/e/从初始接触点开始，通过施加在分层结构第二表面上的压力将分层结构的第一表面贴覆到镜片表面，该分层结构的第一和第二表面分别在渐增的接触区域的外围边界处翻转回凹入形状和凸起形状。
所获得的组件的质量与光学应用一致，特别是与装配有分层结构的镜片的眼科应用一致。甚至，在将分层结构贴覆到该镜片表面上之后，分层结构将不会出现褶皱，裂缝和分层。因此，所获得的在其上具有分层结构的镜片的组件不会显出可视的缺陷。
组件的这种光学质量由本发明的下述特征产生。
首先，分层结构在步骤/b/中热力成形，使其获得一个弯曲的形状。从而在步骤/e/期间，相比于没有热力成形而被贴覆在镜片表面上的平面分层结构，在分层结构中产生的应力是减小的。
接着，在步骤/c/中以及在步骤/e/期间，分层结构的曲率被两次翻转。因此，该组件中的分层结构的曲率方向与它们在热力成形步骤/b/中产生的曲率方向一致。换而言之，最终组件中的分层结构的每个第一和第二表面分别是热力成形后的凹面和凸面。这也使得在将分层结构贴覆到镜片上之后在分层结构中保留的应力是减少的。
在本发明的第一改进中，在步骤/e/期间，基本上没有压力会施加到在渐增的接触区域以外的分层结构的第二表面上，因此，分层结构的外围部分能适应在步骤/e/期间出现的残余伸展而不会产生缺陷。此外，步骤/e/后的残余应力在分层结构中能更加扩散，因此该应力引起局部缺陷的可能性降低。
在本发明的第二改进中，步骤/e/可以通过加热的分层结构实现。因此该分层结构在步骤/e/期间以及之后是柔软的，并能够适于更重要的应力变形和/或形状变化而不会形成缺陷。
本发明方法的第一优势在于可以快速地实施。特别地，其可与消费者所需的实际实施时间相一致，例如在眼镜零售商处。零售商需要库存有与所需的光学功能相对应的分层结构，并且该分层结构通过使用本发明的方法被贴覆在与消费者的屈光不正相对应的镜片上。
本发明方法的第二优势在于其在被实施时不要求复杂和昂贵的工具，并且操作者只需经过简短的技术训练即可。
为了实现本发明的目的，该分层结构可以是单一的材料层或具有普通层状的几个层的堆叠。特别地，分层结构可以是结合了一个或两个保护膜的偏振膜，该保护膜被层压在偏振膜的一侧或每一侧上。
在步骤/a/中提供的具有平面形状的分层结构可以在较大的薄片中被切割出，该薄片以滚筒的形式被方便地提供。
根据本发明一优选的实施方式，步骤/d/和/e/通过粘合层实现，该粘合层设置在镜片表面和分层结构的第一表面之间。因此，具有分层结构的镜片的永久组件可以被获得。优选地，粘合层可以包括压敏粘合类型的材料，从而该结构在步骤/e/中被直接地粘在镜片表面上。该粘合层可以设置在镜片表面上或在层压前的分层结构上。
即使热力成形后该结构的曲率不同于镜片表面的曲率，本发明的方法仍旧可以使分层结构与镜片结合。分层结构的曲率在步骤/e/期间被自动修正，从而使得分层结构的最终曲率与镜片表面的曲率匹配。
优选地，步骤/b/可以被实施，从而在步骤/b/和/c/之间，分层结构第一表面中至少一点处的分层结构的曲率大于或等于镜片表面中一点处的镜片表面的曲率，镜片表面中的所述一点与步骤/e/后分层结构的第一表面中的至少一点相对应。在本发明的框架中，曲率是指两个曲率的平均值，这两个曲率被限定在一表面中沿着两个垂直方向的任意点处。从数学角度上来说，曲率等于曲率半径的倒数：曲率半径减小时，曲率变得越大。这种分层结构和镜片表面各自曲率间的关系进一步保证了该结构在步骤/e/之后能保持其在镜片表面外围部分中被适当地贴覆到镜片上。当镜片表面具有恒定曲率时，在步骤/b/之后，分层结构的曲率大于或等于分层结构第一表面任意点处的镜片的表面曲率。
特别地，本发明有利于将分层结构贴覆到具有高曲率的镜片上。该镜片表面的曲率半径可以是小于305毫米，优选为小于100毫米，特别地可以小于75毫米。
本发明同样有利于将分层结构贴覆到渐进多焦镜片上。在此情况中，镜片表面显出了沿着该表面连续变化的曲率。对于眼镜片而言，基础曲率和光焦度增加是如今用于定义渐进表面的参数。它们定义了远视点以及近视点处镜片表面的曲率半径。对于渐进多焦镜片来说，近视点处镜片表面的曲率大于远视点处的曲率。因此，发明人已经发现具有分层结构的镜片组件是无缺陷的，特别是分层结构在步骤/b/之后的曲率大于远视点处镜片的表面曲率。
附图说明
本发明这些方面或其它方面会通过下面参考以下附图的非限制性描述而变得显而易见：
-图1a和1b分别是分层结构和镜片的横截面图，该分层结构和镜片能用于实施本发明；
-图2a和2b图示了在分层结构被贴覆到镜片上之前，本发明方法的两个步骤；
-图3a和3c是贴覆装置的透视图，该装置可以被用于实施本发明；以及
-图4a-4d图示了本发明方法的贴覆步骤。
在这些附图中，同一个标记表示同一个元件。此外，出于清楚的目的，所描绘的元件尺寸并不与实际元件的尺寸相对应。
具体实施方式
图1a图示了分层结构1，该分层结构1可以被用来提供一种具有偏振效果的镜片。该结构出于说明性的目的被使用，并且可以理解的是，本发明可以被实施于任何分层结构的光学特性。
所述结构1包括偏振膜2，该膜2可以基于聚乙烯醇(PVA)或聚对苯二甲酸乙二醇酯(PET)材料。该膜2的厚度可以在5μm(微米)到200μm之间。例如其可以大约等于40μm。结构1同样可以包括至少一层设置在膜2一侧上的保护膜。该保护膜确保了在处理期间膜2中不会产生划痕。有利地，结构1包括两层保护膜3和4，它们设置膜2的两侧。举例来说，该保护膜3和4可以基于三乙酸纤维素(TAC)或乙酸丁酸纤维素(CAB)材料，并且它们的厚度例如可为150μm。结构1最初为平面形状，并且S1和S2表示结构1相对平行的表面。
图1b图示了眼镜片10，优选地，是在其被切割成用于特定眼镜架的尺寸之前。此时，该镜片10的直径一般为约6cm并且可以由普遍用于眼镜片的任何材料制成，即无机物、有机物或复合材料。举例来说，镜片10可以包括一部分基于至少一个聚碳酸酯化合物、至少一个聚酰胺化合物、二甘醇二烯丙基碳酸酯聚合物或共聚物、硫代氨基甲酸酯(thiourethane)聚合物或共聚物，或环硫化物聚合物或共聚物的材料。更具体地，当镜片10包括一个或多个如下聚合物时本发明易于被实施，所述聚合物可以是聚碳酸酯、聚酰胺、聚酰亚胺、聚砜、聚对苯二甲酸乙二醇酯和聚碳酸酯共聚物、聚烯烃，尤其可以是聚降冰片烯、被称为CR39的二甘醇二(烯丙基碳酸酯)的聚合物和共聚物，(甲基)丙烯酸聚合物和共聚物，特别是包括衍生自双酚A的(甲基)丙烯酸聚合物和共聚物、硫代(甲基)丙烯酸聚合物和共聚物、氨基甲酸酯和硫代氨基甲酸酯聚合物或共聚物、环氧聚合物或共聚物、以及环硫化物聚合物和共聚物。
镜片10可以具有任何光学类型。例如，其可以是屈光不正矫正镜片或是例如太阳眼镜这样的非矫正镜片。特别地，其可以是单焦点、双焦点、三焦点或渐进多焦点镜片。
镜片10具有凸面S0，在镜片被眼镜佩戴者使用时该凸面S0对应于镜片的前表面。结构1被切割成与镜片表面S0相对应的尺寸，但是优选地，其被切割成略大于表面S0的尺寸。该分层结构1首先被热力成形，从而使其弯曲，例如具有大致球形的形状。这种热力成形可以通过使用已知的方法来实现，例如在已公开的美国专利申请US2005/0121835中所描述的。当结构1在热力成形后被再次冷却时，其具有固定的弯曲形状并带有凸面和凹面。例如，表面S1是凹面，表面S2是凸面(图2a)。
分层结构1的曲率随后被翻转。该翻转可以手动进行或者可以例如通过使用膨胀薄膜、通过在凸面S2的中间部分处挤压该凸面来实现。图2b示出了结构1的曲率被翻转后其所具有的形状。
图3a-3c示出了能被用来将分层结构1贴覆到镜片10上的装置。根据图3a所示，该系统包括下部部件200和上部部件300。该下部部件200包括主体201，该主体201装备有两个侧边凸缘(flange)202a和202b。该凸缘202a和202b设置有槽203a和203b。部件300包括主体301，该主体301装备有侧轨303a和303b，以此通过侧轨303a和303b沿着形成滑道的槽203a和203b的移动而使得部件200和300能简单地结合在一起。图3a和3b分别示出了部件200和300在移位时的配置和在装配时的配置。当部件200和300结合在一起时，它们形成了预先已确定高度的间隙400。
部件200还包括镜片固定件204，其在凸缘202a和202b之间定位在主体201的中间部分。该固定件204可以与主体201整体结合在一起。图3c示出了图3a中上部部件300的仰视图。部件300的主体301设有开口304，该开口304的尺寸大于镜片10。关闭部件305(图3b)从上面装配到主体301中以用于关闭开口304。一弹性薄膜306在主体301和围绕开口304的部件305之间被夹紧。当薄膜306以密封的方式被夹紧时，该关闭部件305通过用螺丝拧紧的支架311抵靠主体301夹紧固定。因此，该薄膜306和关闭部件305形成密封腔310(图4a)。该关闭部件305设有进气装置307，用来将加压气体引入到腔310中。这些进气装置307包括用来与加压气体源(未示出)连接的外部管道部件。该主体301具有围绕开口304的直孔(straight bore)308，该直孔308适于将关闭部件305保持在相对于开口304的中心位置中。其还包括用来引导通过开口304的薄膜306变形的锥形面部件309。弯曲的连接表面310连接了孔308与锥形表面部件309。
图4a-4d中的横截面图示出了在装配位置的部件200和300。因而，固定件204在开口304下方的中心位置，在固定件204和开口304之间具有高度固定的间隙400。现在通过参考这些附图详细了解装置的使用。
当部件200和300分开时，镜片10被放置在保持件204上，凸面S0面朝上。粘合材料的层20已经预先被设置在镜片表面S0上。层20的厚度可大约为25μm，并且优选地，粘合材料为压敏类材料(PSA，Pressure-Sensitive Adhesive)。任何其它类型的粘合材料也可以被选择使用，只要该材料能将分层结构1保持在镜片表面S0上。例如，可以使用热粘合剂、UV光固化粘合剂、热熔性粘合剂或乳胶粘合剂。可选择地，该粘合材料层20可以被设置在分层结构1的表面S1上。在某些情况下，取决于所使用的粘合材料，各个粘合材料层可被设置在表面S0和S1上。层20可以通过使用任何本领域公知的方法，例如旋转喷涂这样的方法来被设置在镜片10或/和结构1上。
因为分层结构是以简单和便宜的方式被永久保持在镜片10上，而且不会削弱镜片和结构的光学特性，使用压敏粘合剂(PSA)将特别有利。特别地，在通过压敏粘合剂获得永久连接时，既不需要例如紫外线照射这样的照射，也不需要强化加热。所有压敏粘合剂可以展现出持久的粘性(tack)并在室温下具有较低的弹性模数，典型地在103到107pa(帕斯卡)之间。需要指出的是，涉及压敏粘合剂的粘合机理不包括化学粘接，而是基于压敏粘合剂特殊的粘弹特性。对于每个压敏粘合剂配方都固有的这些特性能够在粘接界面建立静电范德瓦(Vander Waals)相互作用。当压敏粘合剂与固体材料通过压力接触时，这种相互作用会产生。压敏粘合剂的压力和低模数建立了在一分子尺度下压敏粘合剂与固体材料拓扑的紧密接触。此外，压敏粘合剂的大量粘弹特性引起在粘合层厚度中的能量消散，该能量由粘接界面的机械应力产生。因此该界面可以经受住拉拔强度和剥离机理。
另外，压敏粘合剂可以被设置成具有均匀厚度的薄层的形式。该厚度可以在0.5到300μm之间。从而，通过镜片1的图像成形不会被压敏粘合层削弱，并且镜片的光焦度不会改变。特别地，当镜片是渐进多焦类型时，具有分层结构的镜片组件与所需的精度一致。
几种压敏粘合剂可以被用于本发明的方法。优选地，压敏粘合剂可以从化合物中选择，这些化合物可以是基于聚丙烯酸酯、苯乙烯块状共聚物和天然橡胶共混物。在非限制性的压敏粘合剂例子中，粘合剂具有基于聚丙烯酸酯尤其是聚甲基丙烯酸酯的合成物，或是基于乙烯共聚物的合成物，该乙烯共聚物可以是乙烯醋酸乙烯、乙烯丙烯酸乙酯和乙烯甲基丙烯酸乙酯(ethylene ethyl methacrylate)共聚物，或是基于合成橡胶和人造橡胶的合成物，该合成橡胶和人造橡胶合成物包括硅树脂、聚亚安酯、苯乙烯丁二烯、聚丁二烯、聚异戊二烯、聚丙烯、聚异丁烯，或是基于包含腈和丙烯腈(acrylonitriles)的聚合物，或是基于聚氯丁烯，或基于包括聚苯乙烯、聚乙烯、聚丙烯、聚异戊二烯、聚丁二烯的共聚物，或是基于聚乙烯吡咯烷酮或乙烯吡咯烷酮共聚物，或是上述聚合物的混合物(具有连续或非连续相)，并且同样可以包括从上述所列化合物获得的块状共聚物。这些压敏粘合剂同样可以包括一个或多个粘合剂，该粘合剂可以从增粘树脂、可塑剂、粘结剂、抗氧化剂、稳定剂、颜料、染料、分散剂和扩散剂中选择。为了能实施本发明，优选地使用聚丙烯酸酯基的压敏粘合剂。
分层结构被设置在镜片10的顶部，分层结构的表面S1面向镜片的表面S0。由于表面S0和S1在此时都是凸面，所以在一个很小的区域中结构1的表面S1与镜片10的表面S0接触，该区域实际上被减小到一个点，即图4a中的A。分层结构1的表面S0也可以逐渐接近镜片的表面S1。此实施例呈现出控制S0和S1间接触点的优势。
之后通过滑入槽203a和203b中的轨303a和303b，部件300与部件200结合在一起，而无需移动镜片10和结构1。薄膜306随后逐渐充气膨胀从而使得其与分层结构1的凹面S2在点A(图4b)上相接触。当在腔310内的气体压力进一步增加时，薄膜306利用逐渐增加的接触区域推动结构1紧贴镜片10的表面S0。该接触区域在图4c中被标明为ZCONTACT。在区域ZCONTACT中，结构1与镜片凸面S0形状一致，从而结构1的表面S1在区域ZCONTACT中是凹面。在区域ZCONTACT外，薄膜306还没有与结构1的表面S2接触，从而结构1的表面S1在区域ZCONTACT以外仍旧是凸面。因此，表面S1在区域ZCONTACT边界处局部地从凸起形状翻转成凹入形状，而同时该边界沿着镜片10的外围边缘移动。最终，由于腔310中足够的气压，结构1被贴覆贴覆到镜片10上覆盖整个表面S0(图4d)。从而结构1的表面S1再次在其整个面积上成为凹面，因而结构1显示出弯曲的形状，该弯曲形状的曲率方向与从热力成型中产生的并在图2a中示出的曲率方向近似。
之后，腔310中的气压被释放，部件300从部件200上被卸下，镜片10也重新具有粘附其上的结构1。
优选地，结构1在放置到镜片10顶部(图4a)前被加热，从而当其在薄膜306和镜片10之间被逐渐压制时(图4b-4d)是柔软的。优选地，结构1的温度高于75℃。这个温度可以根据分层结构1的材料选择，例如与它们的玻璃化温度Tg相关，从而分层结构1能适应临时的压力而不产生缺陷。
下面的表1指出了当上述方法被实施时所要用到的工艺参数。镜片表面S0的几何特征在第一栏中被指出。对于渐进镜片来说，FV和NV分别是指表面S0在远视点和近视点处的曲率半径。第二栏指出了热力成形后结构1的平均曲率。所有对应于该表各行的例子在装配之后都没有缺陷，并显示出适于眼科利用的光学质量。
表1
 
镜片10的表面S0：曲率半径 热力成形后结构1的曲率半径(单位：毫米) 在镜片10上贴覆期间结构1的温度
恒定111.6mm 88.3mm 周围环境温度
FV：141.3mm 88.3mm 周围环境温度
 
NV：73.3mm
FV：302.9mmNV：111.6mm 88.3mm 周围环境温度
FV：66.2mmNV：60.6mm 45.6mm 100℃
FV：66.2mmNV：60.6mm 49.9mm 80℃
FV：66.2mmNV：46.1mm 45.6mm 100℃
FV：66.2mmNV：46.1mm 45.6mm 80℃
FV：66.2mmNV：44.2mm 53.75mm 80℃
本发明的实施方式已经被详细描述，但其可以被修改或改进为适应任何特殊条件。每个元件所引用到的所有数值以及材料只是为了说明本发明的目的。举例来说，根据层2的材料，结构1可以不包括保护层。另外，分层结构1可以进一步包括在表面S2上的功能性涂层，例如抗反射涂层、抗尘涂层、抗雾涂层、抗磨涂层、抗静电涂层或这些涂层的结合。从而，镜片10同时具有膜层2的光学功能和功能性涂层的效果。此种结合致使完成镜片的制作过程在时间上减少。

Claims (21)

1.将分层结构(1)贴覆到镜片(10)的凸面上的方法，包括下述步骤：
/a/提供具有平面形状的分层结构；
/b/将所述分层结构热力成形，从而使其弯曲并具有凹入的第一表面(S1)和凸起的第二表面(S2)；
/c/将所述分层结构的曲率翻转，从而使得所述第一表面(S1)翻转成凸面，所述第二表面(S2)翻转成凹面；
/d/在初始接触点处将所述分层结构(1)的第一表面(S1)与镜片表面(S0)相接触；以及
/e/从所述初始接触点开始，通过施加在分层结构第二表面(S2)上的压力将分层结构的第一表面(S1)贴覆到镜片表面(S0)上，该分层结构的第一和第二表面分别在渐增的接触区域的外围边界处翻转回凹入形状和凸起形状。
2.如权利要求1所述的方法，其中步骤/e/被实施，从而在所述渐增的接触区域以外基本上没有压力被施加到所述分层结构的第二表面(S2)上。
3.如权利要求1所述的方法，其中步骤/e/在实施时采用被加热的分层结构(1)。
4.如权利要求3所述的方法，其中所述分层结构(1)的温度在步骤/e/期间至少为75℃。
5.如权利要求1所述的方法，其中所述镜片表面(S0)具有小于305毫米的曲率半径。
6.如权利要求5所述的方法，其中所述镜片表面(S0)具有小于100毫米的曲率半径。
7.如权利要求6所述的方法，其中所述镜片表面(S0)具有小于75毫米的曲率半径。
8.如前述权利要求中任一项所述的方法，其中步骤/d/和/e/在实施时采用粘合层(20)，该粘合层设置在所述镜片表面(S0)和所述分层结构的第一表面(S1)之间。
9.如权利要求8所述的方法，其中所述粘合层(20)被贴覆到镜片表面(S0)和/或所述分层结构的第一表面(S1)上。
10.如权利要求8所述的方法，其中所述粘合层(20)包括压敏粘合类材料。
11.如权利要求1所述的方法，其中在步骤/e/期间，通过一弹性薄膜(306)将压力施加到所述分层结构的第二表面(S2)上，该弹性薄膜被充气膨胀并在所述渐增的接触区域中挤压分层结构的第二表面。
12.如权利要求1所述的方法，其中步骤/b/被实施，从而在步骤/b/和/c/之间，在所述分层结构的第一表面(S1)中至少一点处的分层结构(1)的曲率大于或等于在所述镜片表面中一点处的镜片表面(S0)的曲率，所述镜片表面中的所述一点与步骤/e/后分层结构的第一表面中的所述至少一点相对应。
13.如权利要求中12所述的方法，其中所述镜片表面(S0)具有恒定的曲率，并且步骤/b/被实施，从而在步骤/b/和/c/之间，所述分层结构(1)的曲率大于或等于所述分层结构的第一表面上任意点处的镜片表面(S0)的曲率。
14.如权利要求12所述的方法，其中所述镜片(10)属于渐进多焦镜片类型，并且镜片表面(S0)在近视点处的曲率大于该镜片表面在远视点处的曲率，并且其中步骤/b/被实施，从而在步骤/b/和/c/之间，所述分层结构(1)的曲率大于所述镜片表面(S0)在远视点处的曲率。
15.如权利要求1所述的方法，其中所述分层结构(1)包括偏振膜(2)。
16.如权利要求15所述的方法，其中所述偏振膜(2)基于聚乙烯醇或聚对苯二甲酸乙二酯。
17.如权利要求15所述的方法，其中所述分层结构(1)进一步包括设置在所述偏振膜(2)一侧上的保护膜(3)。
18.如权利要求17所述的方法，其中所述保护膜(3)基于三醋酸纤维素或乙酸丁酸纤维素。
19.如权利要求17或18所述的方法，其中所述分层结构(1)包括两个设置在所述偏振膜(2)任一侧的保护膜(3，4)。
20.如权利要求1所述的方法，其中所述分层结构(1)进一步包括至少一层在所述分层结构的第二表面(S2)上的功能性涂层。
21.如权利要求1项所述的方法，其中所述镜片(10)是眼镜片。
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