Title:
OPTICAL ELEMENT, LAMINATE BODY, AND BOOK FORM
Document Type and Number:
WIPO Patent Application WO/2018/079773
Kind Code:
A1
Abstract:
Provided are an optical element, a laminate body, and a book form having improved security. The optical element 40 is equipped with a hologram layer 41 on which a hologram image 41b is recorded, and a diffraction grating layer 50 laminated under the hologram layer 41. The diffraction grating layer 50 is equipped with a diffraction grating 52a having recesses and protrusions in the thickness direction. In addition, a card 1 is equipped with this optical element 40.
Inventors:
MOTOI TAKUMI (JP)
AOYAMA YUKO (JP)
SATO JUN (JP)
AOYAMA YUKO (JP)
SATO JUN (JP)
Application Number:
PCT/JP2017/039110
Publication Date:
May 03, 2018
Filing Date:
October 30, 2017
Export Citation:
Assignee:
DAINIPPON PRINTING CO LTD (JP)
International Classes:
G03H1/02; B32B7/02; B42D25/24; B42D25/328; G02B5/18
Foreign References:
| JP2007203568A | 2007-08-16 | |||
| JP2005189168A | 2005-07-14 | |||
| JP2012071477A | 2012-04-12 | |||
| JP2016510431A | 2016-04-07 | |||
| US20100060989A1 | 2010-03-11 | |||
| JP5559354B2 | 2014-07-23 |
Other References:
See also references of EP 3534221A4
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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