PROBLEM TO BE SOLVED: To provide a product authentication display body, product authentication device, product authentication system and product authentication method that enable a product to be simply and surely authenticated.;SOLUTION: A product authentication display body 1 comprises: a pixel pattern 20 that is formed on a surface of a product G or of an accessory of the product G by two-dimensionally arraying a plurality of pixels 21 with directionality given to a row of each pixel 21; a sheet-like or plate-like transparent material 10 that is provided in a different body from the product G or the accessory of the product G; and a condensing element pattern 30 that is formed on a surface of the transparent material 10 by two-dimensionally arraying a plurality of condensing elements 31 with the directionality given to a row of each condensing element 31 in an array pitch different from that of the pixel 21. When the condensing element pattern 30 is disposed over the pixel pattern 21 with mutually same directionality given via the transparent material 10, an enlarged virtual image Z of the pixel 21 for authenticating whether the product G is a genuine article is configured to appear over or below the transparent material 10.;COPYRIGHT: (C)2015,JPO&INPIT
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