Information recording medium and method of reading information recording medium, and image detection apparatus,申请号US201414306733-传众专利搜索

Information recording medium and method of reading information recording medium, and image detection apparatus

申请公布号：US9333797(B2)

申请号：US201414306733

申请日期：2014.06.17

申请公布日期：2016.05.10

申请人：

TOPPAN PRINTING CO., LTD.

发明人：Toda Toshiki;Oota Harumi;Inokuchi Masami;Kishimoto Yasushi;Chi Su Fang

分类号：G06K19/06;B44F1/10;G02B5/18;B42D25/328;B42D25/29

主分类号：G06K19/06

地址：Tokyo JP

摘要：In an information recording medium, in which an information recording medium has diffraction grating cells arranged therein, a plurality of types of the diffraction grating cells make up one information recording area. At least one type of the diffraction grating cells included in the diffraction grating cells making up the information recording area are information recording elements, while the other types of the diffraction grating cells included in the diffraction grating cells making up the information recording area are information hiding elements. The information is recorded by two-dimensional arrangement of the diffraction grating cells constituting the information recording elements in the information recording area.

主权项：1. An information recording medium, comprising: an arrangement of diffraction grating cells constituting cells each formed of a diffraction grating, wherein the information recording medium has an uneven surface and the diffraction grating cells are arranged on the uneven surface of the information recording medium, a plurality of types of the diffraction grating cells make up one information recording area,two or more types of the diffraction grating cells included in the diffraction grating cells making up the information recording area are information recording elements,two or more types of the diffraction grating cells included in the diffraction grating cells making up the information recording area are information hiding elements,at least one of the diffraction grating cells included in the diffraction grating cells making up the information recording area is dummy,the diffraction grating cells of different types included in the diffraction grating cells making up the information recording area are configured of diffraction gratings having different grating angles from each other, information is recorded in a two-dimensional arrangement of the diffraction grating cells constituting the information recording elements in the information recording area, when the diffraction grating cells are irradiated with an illumination light from a light source, only one diffraction grating light ray is emitted from one diffraction grating cell, and the illumination light is a diffused illumination light that irradiates the diffraction grating cell in a plurality of angles and the diffraction light ray diffracts and diverges in a certain degree.