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Patent Searching and Data


Title:
OPTICAL STRUCTURE AND METHOD FOR PRODUCING OPTICAL STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2021/015198
Kind Code:
A1
Abstract:
This optical structure is provided with: a spacer layer having translucency or transparency; an image-forming reflector formed in a first area at least on the spacer layer, the image-forming reflector having a reflective layer; and a protective layer laminated on the spacer layer and the image-forming reflector, the protective layer having translucency or transparency. A material for the spacer layer is a polymer having polyolefin and/or aryl. A visible image is formed on the image-forming reflector. The image formed on the image-forming reflector is authenticatable. The image-forming reflector has an individual information record in which a code is recorded by a plurality of linear removed segments formed by removing a part of the reflective layer. In plan view, the image-forming reflector has white level areas in which the plurality of linear removed segments are formed, and black level areas sandwiched between the white level areas.

Inventors:
KAGOTANI AKIHITO (JP)
UCHIDA SATOSHI (JP)
KODA SOKO (JP)
Application Number:
PCT/JP2020/028263
Publication Date:
January 28, 2021
Filing Date:
July 21, 2020
Export Citation:
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Assignee:
TOPPAN PRINTING CO LTD (JP)
International Classes:
G06K19/00; G02B5/08; G06K19/02; G07D7/0043; G11B7/24012; G11B7/24035; G11B7/243; G11B7/2575; G11B7/26
Foreign References:
JP2004341146A2004-12-02
JP2005158115A2005-06-16
JP2010049736A2010-03-04
JPH07329469A1995-12-19
JP2002140682A2002-05-17
JP2004348963A2004-12-09
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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