Open AccessSerial number coding and decoding by laser interference direct patterning on the original product surface for anti-counterfeiting
Author(s) -
In-Yong Park,
Sanghoon Ahn,
YoungDuk Kim,
Han-Sung Bae,
Hee-Shin Kang,
Jason J. Yoo,
Jiwhan Noh
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.014644
Subject(s) - optics , diffraction , laser , diffraction grating , materials science , grating , interference (communication) , diffraction efficiency , physics , computer science , telecommunications , channel (broadcasting)
Here, we investigate a method to distinguish the counterfeits by patterning multiple reflective type grating directly on the surface of the original product and analyze the serial number from its rotation angles of diffracted fringes. The micro-sized gratings were fabricated on the surface of the material at high speeds by illuminating the interference fringe generated by passing a high-energy pulse laser through the Fresnel biprism. In addition, analysis of the grating's diffraction fringes was performed using a continuous wave laser.