科研之友
微信
新浪微博
Facebook
分享链接
摘要
Principles of printing security based on grating phase encoding are analyzed and the corresponding design scheme and process are also provided. Several security devices for single-direction and four-direction encoding and decoding are designed and fabricated. Study results indicate that the technologies presented in this paper are based on phase encoding of gratings and Moiré principle. For multi-direction encodings, encoding frequency, encoding phase, stripe width and encoding direction are crucial parameters for designs which affect visual effects of decoding. Fabricated devices with single-direction and four-direction achieve expected requirements. This technology can be applied in printing security fields for enhancing the quality of anti-counterfeiting.
