Invention Grant
- Patent Title: Authenticity proving optical structure, authenticating proof recording medium and authenticity certifying method
- Patent Title (中): 真实性证明光学结构，验证记录介质和真实性认证方法
-
Application No.: US10491416Application Date: 2002-10-09
-
Publication No.: US07885481B2Publication Date: 2011-02-08
- Inventor: Shin-Ichiro Suzuki
- Applicant: Shin-Ichiro Suzuki
- Applicant Address: JP Tokyo
- Assignee: Dai Nippon Printing Co., Ltd.
- Current Assignee: Dai Nippon Printing Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2001-313820 20011011
- International Application: PCT/JP02/10492 WO 20021009
- International Announcement: WO03/034156 WO 20030424
- Main IPC: G03H1/00
- IPC: G03H1/00
Abstract:
An optical structure 3 having a plurality of minute optical unit areas 4 is formed on a base 2. Each of the minute optical unit areas 4 has a plurality of minute areas A and B storing depth information representing multiple-valued phase information about a Fourier transformation image obtained through the Fourier transformation of an original image. In another embodiment of the present invention, the two adjacent minute optical unit areas 4 have a plurality of minute areas A and B storing depth information representing multiple-valued phase information about Fourier transformation images obtained through the Fourier transformation of different original images, respectively.
Public/Granted literature
- US20040207891A1 Optical structure body for authentication, recording medium for authentication, and confirmation method Public/Granted day:2004-10-21
Information query
