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Title:
OPTICAL ANTI-COUNTERFEITING ELEMENT AND ANTI-COUNTERFEITING PRODUCT COMPRISING OPTICAL ANTI-COUNTERFEITING ELEMENT
Document Type and Number:
WIPO Patent Application WO/2022/088815
Kind Code:
A1
Abstract:
An optical anti-counterfeiting element and an anti-counterfeiting product comprising an optical anti-counterfeiting element, the optical anti-counterfeiting element comprising: a substrate (1); a first light gathering element array, which is formed in a first region of a first surface (11) of the substrate (1), the first light element gathering array comprising one or more light gathering elements having a first focal length; and a second light gathering element array, which is formed in a second region of the first surface (11) of the substrate (1), the second light gathering element array comprising one or more light gathering elements having a second focal length that is different from the first focal length. The optical anti-counterfeiting element employs a plurality of light gathering element arrays to implement imaging on receiving screens (2, 3) of different focal lengths, thereby achieving the reproduction of hidden images.

Inventors:
CUI HAIBO (CN)
WANG XIAOLI (CN)
Application Number:
PCT/CN2021/109844
Publication Date:
May 05, 2022
Filing Date:
July 30, 2021
Export Citation:
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Assignee:
ZHONGCHAO SPECIAL SECURITY TECHNOLOGY CO LTD (CN)
CHINA BANKNOTE PRITING AND MINTING CORP (CN)
International Classes:
B42D25/30; G02B3/00
Domestic Patent References:
WO2019006497A12019-01-10
Foreign References:
CN104614790A2015-05-13
CN109074024A2018-12-21
CN110415602A2019-11-05
CN109789721A2019-05-21
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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