公开(公告)号：US20150316696A1

公开(公告)日：2015-11-05

申请号：US14647534

申请日：2014-02-06

Applicant: NITTO DENKO CORPORATION

Inventor： Takashi KAMIJO ,  Akinori IZAKI ,  Takeharu KITAGAWA ,  Shusaku GOTO ,  Daigoro NAKAGAWA

IPC: G02B5/30 ,  G02B1/14

CPC classification number: G02B1/14 ,  B32B7/02 ,  B32B7/12 ,  B32B27/08 ,  B32B27/306 ,  B32B2307/412 ,  B32B2307/418 ,  B32B2307/42 ,  B32B2457/20 ,  B32B2457/202 ,  B32B2457/206 ,  G02B1/11 ,  G02B1/111 ,  G02B5/3033 ,  G02B5/3083

Abstract: An optical laminate in which a polarizing film including a polyvinyl alcohol-based resin having oriented iodine is bonded on a first surface of the polarizing film to an optical film through an optically transparent adhesive layer is provided. The polarizing film exhibits a property that a value expressed by the following formula: Aa×(Is/Ia), is 0.53 or more, where: Aa represents an absorbance; Ia represents a value obtained by integrating a distribution of integrated intensities in the thickness direction of the polarizing film; and Is represents a value obtained by integrating, a distribution of integrated intensities in the thickness direction of the polarizing film; and the adhesive layer exhibits a property that a difference between a refractive index of the adhesive layer and a refractive index in the absorption axis direction of the polarizing film at the first surface of the polarizing film is 0.08 or less.

Abstract translation: 提供了一种光学层叠体，其中包括具有取向碘的聚乙烯醇系树脂的偏振膜通过光学透明粘合剂层粘合在偏振膜的第一表面上与光学膜。 该偏光膜具有下述式所表示的值：Aa×（Is / Ia）为0.53以上，其中：Aa表示吸光度; Ia表示通过对偏振膜的厚度方向的积分强度分布进行积分而得到的值; Is表示通过对偏振膜的厚度方向的积分强度的分布进行积分而得到的值; 并且粘合剂层具有粘合剂层的折射率与偏振膜的第一表面的偏振膜的吸收轴方向的折射率之间的差为0.08以下的性质。