Title:
The card in which the security medium was arranged, the paper in which the security medium was arranged
Document Type and Number:
Japanese Patent JP6256727
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a security medium that can accurately reproduce a shape of a three-dimensional structure for authenticity determination.SOLUTION: A security medium includes: a microlens array formed on one surface of base material; and a three-dimensional microstructure array formed on the other surface of the base material. The microlens array is configured such that microlenses are arrayed at a first pitch. The three-dimensional microstructure array is configured such that three-dimensional microstructures arranged at focal positions of the microlenses are arrayed at a second pitch different from the first pitch.SELECTED DRAWING: Figure 12
Inventors:
Akiko Kitamura
Soshu Watanabe
Mitsuru Kitamura
Gaku Yamamoto
Yamauchi Go
Yoko Sekine
Soshu Watanabe
Mitsuru Kitamura
Gaku Yamamoto
Yamauchi Go
Yoko Sekine
Application Number:
JP2016252371A
Publication Date:
January 10, 2018
Filing Date:
December 27, 2016
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
International Classes:
B42D25/342; B42D25/23; B42D25/29; B42D25/324; G02B3/00; G09F19/12
Domestic Patent References:
| JP200986041A | ||||
| JP2009543138A | ||||
| JP20115685A |
Foreign References:
| WO2010057831A1 | ||||
| US20090034082 | ||||
| WO2011107788A1 |
Attorney, Agent or Firm:
Teiji Tanaka
Takashi Koyama
Ryukichi Abe
Hirukawa Masanobu
Norihiko Uchida
Kenji Aoki
Akira Yonezawa
Takehiko Katayose
Takashi Koyama
Ryukichi Abe
Hirukawa Masanobu
Norihiko Uchida
Kenji Aoki
Akira Yonezawa
Takehiko Katayose
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