A color image formed from a hologram

A holographic structure with color modulation techniques enhances secure documents by improving color gamut and uniformity, creating tamper-resistant, high-quality images.

JP7875517B2Inactive Publication Date: 2026-06-18イエヌ スマート アイデンティティ フランス
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Patent Information

Application Number
JP2021549411
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2019-02-28
Filing Date
2020-02-13
Publication Date
2026-06-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a color image (IG) comprising a first layer (10) including a holographic structure forming an array (29) of pixels (30) each including a distinct color subpixel (32), and color modulation means configured to select the color of the pixel (30) by modifying the colorimetric contributions of the subpixels (32) relative to one another in the pixel (30) so as to reveal a personalized color image. The color modulation means may include areas of the holographic structure that have been locally destroyed by a laser, called destruction areas, masking means arranged facing the array of pixels for locally masking all or part of the subpixels, or further amplification means arranged facing the array of pixels for locally amplifying the luminous intensity of all or part of the subpixels.
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Citation Information

Patent Citations

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