公开(公告)号：US11155113B2

公开(公告)日：2021-10-26

申请号：US16754317

申请日：2018-11-02

Applicant: Agency for Science, Technology and Research

Inventor： Kun Huang ,  Jinghua Teng ,  Xiao Ming Goh ,  Junhao Shawn Tan

IPC: B42D25/328 ,  G03H1/02 ,  G06K19/16 ,  B42D25/373 ,  B42D25/41 ,  B42D25/30 ,  G06N3/12 ,  G03H1/22 ,  G03H1/00

Abstract: There is provided a holographic security element including a substrate; and an array of nano-reflectors configured to form a pattern on the substrate and to generate a holographic image corresponding to the pattern at a predetermined distance from the substrate when irradiated with a predetermined light source. In particular, the array of nano-reflectors is configured to generate the holographic image at the predetermined distance to have a size that is larger than a size of the pattern. There is also provided a method of forming the holographic security element, and an article having one or more holographic security elements incorporated therein.

公开(公告)号：US10831097B2

公开(公告)日：2020-11-10

申请号：US15304848

申请日：2015-04-14

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Joel Kwang Wei Yang ,  Xiao Ming Goh ,  Di Zhu ,  Shawn Tan ,  Ying Min Wang ,  Zhaogang Dong

IPC: G02B5/00 ,  G03F7/00 ,  H04N1/32 ,  G02B5/26 ,  G02B5/20 ,  G02B5/18 ,  G03F7/16 ,  B82Y30/00 ,  B82Y20/00 ,  G02B6/122

Abstract: A process for plasmonic-based high resolution color printing is provided. The process includes a) providing a nanostructured substrate surface having a reverse structure geometry comprised of nanopits and nanoposts on a support, and b) forming a conformal continuous metal coating over the nanostructured substrate surface to generate a continuous metal film, the continuous metal film defining nanostructures for the plasmonic-based high resolution color printing, wherein a periodicity of the nanostructures is equal to or less than a diffraction limit of visible light. A nanostructured metal film or metal-film coated support obtained by the process and a method for generating a color image are also provided.

公开(公告)号：US11513438B2

公开(公告)日：2022-11-29

申请号：US17061263

申请日：2020-10-01

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Joel Kwang Wei Yang ,  Xiao Ming Goh ,  Di Zhu ,  Shawn Tan ,  Ying Min Wang ,  Zhaogang Dong

IPC: G03F7/00 ,  H04N1/32 ,  G02B5/26 ,  G02B5/20 ,  G02B5/00 ,  G02B5/18 ,  G03F7/16 ,  B82Y30/00 ,  B82Y20/00 ,  G02B6/122

Abstract: A process for plasmonic-based high resolution color printing is provided. The process includes a) providing a nanostructured substrate surface having a reverse structure geometry comprised of nanopits and nanoposts on a support, and b) forming a conformal continuous metal coating over the nanostructured substrate surface to generate a continuous metal film, the continuous metal film defining nanostructures for the plasmonic-based high resolution color printing, wherein a periodicity of the nanostructures is equal to or less than a diffraction limit of visible light. A nanostructured metal film or metal-film coated support obtained by the process and a method for generating a color image are also provided.

公开(公告)号：US20200331283A1

公开(公告)日：2020-10-22

申请号：US16754317

申请日：2018-11-02

Applicant: Agency for Science, Technology and Research

Inventor： Kun Huang ,  Jinghua Teng ,  Xiao Ming Goh ,  Junhao Shawn Tan

IPC: B42D25/328 ,  G03H1/02 ,  G06K19/16

Abstract: There is provided a holographic security element including a substrate; and an array of nano-reflectors configured to form a pattern on the substrate and to generate a holographic image corresponding to the pattern at a predetermined distance from the substrate when irradiated with a predetermined light source. In particular, the array of nano-reflectors is configured to generate the holographic image at the predetermined distance to have a size that is larger than a size of the pattern. There is also provided a method of forming the holographic security element, and an article having one or more holographic security elements incorporated therein.