US 12,122,179 B2
Security document with double verification lenses
Toni Kaskiala, Meudon (FR)
Assigned to THALES DIS FRANCE SAS, Meudon (FR)
Appl. No. 17/603,595
Filed by THALES DIS FRANCE SAS, Meudon (FR)
PCT Filed Apr. 8, 2020, PCT No. PCT/EP2020/060049
§ 371(c)(1), (2) Date Oct. 14, 2021,
PCT Pub. No. WO2020/212230, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 19305511 (EP), filed on Apr. 18, 2019.
Prior Publication US 2022/0194116 A1, Jun. 23, 2022
Int. Cl. B42D 25/24 (2014.01); B42D 25/342 (2014.01); B42D 25/351 (2014.01); B42D 25/382 (2014.01); G06F 21/62 (2013.01); G06F 21/86 (2013.01)
CPC B42D 25/351 (2014.10) [B42D 25/24 (2014.10); B42D 25/342 (2014.10); B42D 25/382 (2014.10); G06F 21/6218 (2013.01); G06F 21/86 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A multipage security document, comprising:
a first sheet;
a second sheet connected along one side to the first sheet such that the second sheet may be placed against the first sheet, the second sheet having a see-through portion;
a first verification lens located in the see-through portion and corresponding to a first verification feature, said first verification lens is a first decoding lens; and
a second verification lens is collocated with the first verification lens as an adjacent layer to the first verification lens in the see-through portion and corresponding to a second verification feature, said second verification lens is a second decoding lens,
wherein both the first verification lens and the second verification lens are located in same said see-through portion,
such that the combination of the first and second decoding lenses operate to reveal hidden information through the see-through portion of the second sheet of the multi-page security document regardless of from which direction the see-through portion is viewed wherein the viewing direction depends on to which page spread the multi-page security document is opened,
a third sheet connected along one side to the first and second sheet, the third sheet located adjacent to the second sheet;
wherein the first verification feature is located on a fourth page located on the third sheet on a side of the third sheet adjacent to the second sheet, the first verification lens is a decoding lens, the first verification feature is a first hidden information located in a first image printed on the fourth page such that when the see-through portion is placed above the first image, the first verification feature is revealed by the first verification lens; and
wherein the second verification feature is located on a first page located on the first sheet on a side adjacent to the second sheet the second verification lens is a decoding lens, the second verification feature is a second hidden information located in a second image located on the first page such that when the see-through portion is placed above the second image, the second hidden information is revealed by the second verification lenses.