International Display Workshops General Incorporated Association

Proceedings of the International Display Workshops Volume 29 (IDW '22)

Proceedings of the International Display Workshops Volume 29 (IDW '22)

Dec 14, 2022 - Dec 16, 2022
Fukuoka International Congress Center

11:00 AM - 11:20 AM

[EP2-3L (Invited)] Invisible Digital Image by Thin-film Interference of Nb2O5 using its Periodic Repeatability

*Shuichi Maeda1, Akihiro Fukami1, Kaiki Yamazaki1 (1.Tokai University (Japan))

Invisible Digital Image, Thin-film Interference, Periodic Repeatability

https://doi.org/10.36463/idw.2022.0822

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 range, but detectable in the infrared light range. This technology has a potential to be applied to anti-counterfeiting.