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Open Access
Invisible Digital Image by Thin-Film Interference of Niobium Oxide Using Its Periodic Repeatability

Shuichi MAEDA, Akihiro FUKAMI, Kaiki YAMAZAKI

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Summary :

There are several benefits of the information that is invisible to the human eye. “Invisible” here means that it can be visualized or quantified when using instruments. For example, it can improve security without compromising product design. We have succeeded in making an invisible digital image on a metal substrate using periodic repeatability by thin-film interference of niobium oxides. Although this digital information is invisible in the visible light wavelength range of 400-800nm, but detectable in the infrared light that of 800-1150nm. This technology has a potential to be applied to anti-counterfeiting and traceability.

Publication
IEICE TRANSACTIONS on Electronics Vol.E107-C No.2 pp.42-46
Publication Date
2024/02/01
Publicized
2023/08/22
Online ISSN
1745-1353
DOI
10.1587/transele.2023DII0001
Type of Manuscript
Special Section INVITED PAPER (Special Section on Electronic Displays)
Category

Authors

Shuichi MAEDA
  Tokai University
Akihiro FUKAMI
  Tokai University
Kaiki YAMAZAKI
  Tokai University

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