公开(公告)号：WO2011065242A8

公开(公告)日：2012-05-10

申请号：PCT/JP2010070212

申请日：2010-11-12

Applicant: NHK SPRING CO LTD ,  HOSHINO HIDEKAZU ,  TAKEUCHI ITSUO ,  SAKAUCHI TOKIO ,  SHIBUYA SEIYA ,  IDA TOHRU

Inventor： HOSHINO HIDEKAZU ,  TAKEUCHI ITSUO ,  SAKAUCHI TOKIO ,  SHIBUYA SEIYA ,  IDA TOHRU

IPC: G02F1/13 ,  B42D15/10 ,  G02F1/13363

CPC classification number: B42D25/364 ,  B42D25/29 ,  B42D25/328 ,  B42D25/391 ,  B42D2033/10 ,  B42D2033/26 ,  B42D2035/24 ,  G02B5/3016 ,  G03H1/0244 ,  G03H1/0256 ,  G03H2250/14 ,  G03H2250/36 ,  G03H2250/38

Abstract: Provided is an identification medium with which it is possible to view a latent image having a plurality of colours, even when a polarization filter is positioned away from the identification medium. The identification medium is provided with a cholesteric liquid crystal layer (102) as a specific polarization reflection layer for reflecting light of a specific polarization state, and an optical anisotropic layer (106) having refractive index anisotropy is disposed in a position overlying the cholesteric liquid crystal layer (102). An image (A) which is composed from a region having optical anisotropy different from that of the periphery thereof is formed in the optical anisotropic layer (106). When the identification medium (100) is viewed directly, the image (A) cannot be seen as the effect of the optical anisotropy cannot be seen. When viewed through a circular polarization filter, the image (A) can be seen in specific colours due to the effect of the optical anisotropy.

Abstract translation: 提供了一种识别介质，即使偏振过滤器远离识别介质，也可以利用该识别介质来观看具有多种颜色的潜像。 识别介质设置有作为用于反射特定偏振态的光的特定偏振反射层的胆甾醇型液晶层（102），并且具有折射率各向异性的光学各向异性层（106）设置在上述胆甾型液体 晶体层（102）。 在光学各向异性层（106）中形成由具有与其周围的光学各向异性不同的区域构成的图像（A）。 当直接观察识别介质（100）时，不能看到图像（A），因为不能看到光学各向异性的影响。 当通过圆偏振滤光器观察时，由于光学各向异性的影响，可以以特定颜色看到图像（A）。