Title:
OPTICAL ANTI-COUNTERFEITING ELEMENT AND ANTI-COUNTERFEITING PRODUCT
Document Type and Number:
WIPO Patent Application WO/2021/063121
Kind Code:
A1
Abstract:
Provided are an optical anti-counterfeiting element and an anti-counterfeiting product. The optical anti-counterfeiting element comprises: a substrate (1), which comprises a first surface (11) and second surface (12) that are opposite one another; and a surface micro-structure layer (2) that is formed on at least part of the first surface (11) of the substrate (1). At least part of the surface micro-structure layer (2) comprises a first set of at least a micro-prism (21), and the micro-prism (21) is simultaneously provided with a refractive and a reflective function. Each pixel of a first pattern corresponds to one or more micro-prism refractive illumination spots in the first set of micro-prisms (21) so that, when one side of an optical anti-counterfeiting element illuminates the optical anti-counterfeiting element, a reproduced first pattern can be observed by means of a receiving carrier at a specific distance on the other side, and a floating or sunken virtual image of the first pattern can be directly observed from both sides of the optical anti-counterfeiting element, respectively. The described optical anti-counterfeiting element can provide various anti-counterfeiting effects and improve the anti-counterfeiting performance of the anti-counterfeiting element.
Inventors:
ZHANG BAOLI (CN)
SUN KAI (CN)
ZHANG WEIWEI (CN)
ZHU JUN (CN)
SUN KAI (CN)
ZHANG WEIWEI (CN)
ZHU JUN (CN)
Application Number:
PCT/CN2020/109666
Publication Date:
April 08, 2021
Filing Date:
August 18, 2020
Export Citation:
Assignee:
ZHONGCHAO SPECIAL SECURITY TECHNOLOGY CO LTD (CN)
CHINA BANKNOTE PRINTING & MINTING CORP (CN)
CHINA BANKNOTE PRINTING & MINTING CORP (CN)
International Classes:
B42D15/00
Foreign References:
| CN103260893A | 2013-08-21 | |||
| CN101137514A | 2008-03-05 | |||
| CN104837640A | 2015-08-12 | |||
| CN104797430A | 2015-07-22 | |||
| CN101516634A | 2009-08-26 | |||
| JP2018081248A | 2018-05-24 | |||
| JP2018183961A | 2018-11-22 | |||
| JP2004209940A | 2004-07-29 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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