Title:
反射型体積ホログラムを含むセキュリティ媒体の真贋判定装置、反射型体積ホログラムを含むセキュリティ媒体の真贋判定方法、及び反射型体積ホログラムを含むセキュリティ媒体
Document Type and Number:
Japanese Patent JP6468418
Kind Code:
B2
Abstract:
To provide an authentication device and method for a security medium including a reflective volume hologram, capable of easily performing authentication determination and a security medium including the reflective volume hologram. An authenticity determination device 1 for a security medium 10 including a reflective volume hologram 2 includes a light source L disposed on the front surface side of the reflective volume hologram 2 so that light emitted therefrom is incident on the reflective volume hologram 2, a first observation device 11 disposed in a pre-designed diffraction direction of the reflective volume hologram 2, and a second observation device 12 disposed in a direction other than the pre-designed diffraction direction of the reflective volume hologram 2. Light including a pre-designed diffraction wavelength is emitted from the light source L to be incident on the reflective volume hologram 2, and at this time, when the light amount observed in the first observation device 11 is larger in the diffraction wavelength than in other wavelengths, and the light amount observed in the second observation device 12 is smaller in the diffraction wavelength than in other wavelengths, it is determined that the reflective volume hologram 2 is genuine.
Inventors:
Mitsuru Kitamura
Yamauchi Go
Koji Eto
Nobuko Oikawa
Tomoe Sato
Yamauchi Go
Koji Eto
Nobuko Oikawa
Tomoe Sato
Application Number:
JP2014221705A
Publication Date:
February 13, 2019
Filing Date:
October 30, 2014
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
International Classes:
G03H1/02; B42D25/328; G01N21/84; G07F7/12
Domestic Patent References:
| JP2007268896A | ||||
| JP2014098765A | ||||
| JP2011232511A | ||||
| JP2007093779A | ||||
| JP3188481A | ||||
| JP4317190A | ||||
| JP4340583A | ||||
| JP7021335A |
Foreign References:
| US5570207 |
Attorney, Agent or Firm:
Takashi Koyama
Teiji Tanaka
Hiroshi Nagisawa
Akira Yonezawa
Teiji Tanaka
Hiroshi Nagisawa
Akira Yonezawa