Title:
OPTICAL STRUCTURE, MANUFACTURING METHOD FOR SAME, AND CODE FORMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/106240
Kind Code:
A1
Abstract:
Provided is an optical structure capable of forming a code that is difficult to forge, and achieves both high readability and aesthetics. An optical structure of the present invention comprises: a reflective layer with specular reflectivity; and a printed layer as a diffuse reflector with diffuse reflectivity, which is stacked on at least a part of the reflective layer. In the printed layer, an image portion which is recognizable when viewed from the stacking direction is formed. The image portion has printed light-color level areas, and a non-light-color level area interposed between the light-color level areas.
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Inventors:
IINO TERUMINE (JP)
KAWAHARA TOMOMI (JP)
KAWAHARA TOMOMI (JP)
Application Number:
PCT/JP2022/044598
Publication Date:
June 15, 2023
Filing Date:
December 02, 2022
Export Citation:
Assignee:
TOPPAN INC (JP)
International Classes:
G06K19/06; B42D25/305; B42D25/324
Foreign References:
| JP2017087679A | 2017-05-25 | |||
| JPS5845071U | 1983-03-26 | |||
| JP2006151434A | 2006-06-15 | |||
| JP2006160356A | 2006-06-22 | |||
| JP2009187209A | 2009-08-20 | |||
| JP2010026665A | 2010-02-04 | |||
| US20030205895A1 | 2003-11-06 |
Attorney, Agent or Firm:
SUZUYE & SUZUYE (JP)
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