OPTICAL IDENTIFICATION BODY AND PRINTED MATTER

Title:

OPTICAL IDENTIFICATION BODY AND PRINTED MATTER

Document Type and Number:

WIPO Patent Application WO/2021/157695

Kind Code:

A1

Abstract:

Provided is an optical identification body (10), wherein deflection cells on each of which the deflection direction range of diffracted light is recorded as the spatial frequency of a relief structure are discretely formed at regular intervals on a recording surface, a variable color image is recorded with a plurality of deflection cells as pixels, a space between the deflection cells on the recording surface is filled with a spatial phase modulator (14) on which a phase difference distribution is recorded as the height of the relief structure, a deposition layer covers part or all of the recording surface, and the deflection cell diffracts diffused light and deflects the diffused light by directional scattering, the optical identification body being provided with one or more spatial phase modulators (14) for displaying the variable color image recorded with the deflection cells as pixels, modulating the phase of light from a point light source (b), and displaying a reproduced image (d).

Inventors:

UCHIDA SATOSHI (JP)
KAGOTANI AKIHITO (JP)

Application Number:

PCT/JP2021/004324

Publication Date:

August 12, 2021

Filing Date:

February 05, 2021

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TOPPAN INC (JP)

International Classes:

G02B5/18; B42D25/324; B42D25/328; G03H1/02

Domestic Patent References:

WO2017183718A1	2017-10-26
WO2017209113A1	2017-12-07

Foreign References:

JP2002090548A	2002-03-27
JP2017037273A	2017-02-16
JP2010072384A	2010-04-02
JP2002278433A	2002-09-27
JP2003015510A	2003-01-17
JP2020008614A	2020-01-16
JP2007334130A	2007-12-27
JP2003295744A	2003-10-15
JP3778966B2	2006-05-24
JP2017037273A	2017-02-16
JP2017129802A	2017-07-27
JP2017037273A	2017-02-16
JP2017020049W	2017-05-30

Other References: