公开(公告)号：WO2013166560A1

公开(公告)日：2013-11-14

申请号：PCT/AU2013/000491

申请日：2013-05-06

Applicant: INNOVIA SECURITY PTY LTD

Inventor： LOK, Phei ,  POWER, Gary Fairless ,  STEVENS, Benjamin

IPC: G02F1/19 ,  B42D15/00 ,  G06K19/16

CPC classification number: G03H1/0011 ,  B42D25/29 ,  B42D25/324 ,  B42D25/328 ,  G02B5/00 ,  G02B5/1819 ,  G02B5/1842 ,  G03H1/0236 ,  G03H1/0244 ,  G03H1/0256 ,  G03H2001/0016 ,  G03H2001/0027 ,  G03H2001/187 ,  G03H2250/36 ,  G06K19/16

Abstract: An optical security device is disclosed which includes a diffraction layer having a plurality of diffraction elements and a high refractive index layer, wherein the high refractive index layer is applied on the diffraction layer such that selected regions of the diffraction layer have the corresponding diffraction elements partially uncovered by the high refractive index layer and other regions are substantially covered by the high refractive index layer. Accordingly, the optical security device has a first security feature associated with the diffraction layer and a second security feature associated with the high refractive index layer. An image is viewable from the regions of the high refractive index layer, either, covertly by placed an index matched item over the device or, overtly, through selection of the thickness of the high refractive index layer.

Abstract translation: 公开了一种光学安全装置，其包括具有多个衍射元件和高折射率层的衍射层，其中将高折射率层施加在衍射层上，使得衍射层的选定区域具有部分对应的衍射元件 由高折射率层和其他区域覆盖的高折射率层基本上被高折射率层覆盖。 因此，光学安全装置具有与衍射层相关联的第一安全特征和与高折射率层相关联的第二安全特征。 可以从高折射率层的区域中观看图像，或者，通过在设备上放置指数匹配项目，或者通过选择高折射率层的厚度来隐藏图像。