Search International and National Patent Collections

1. (WO2018204982) AN OPTICAL SECURITY DEVICE AND METHOD OF MANUFACTURE

Pub. No.:    WO/2018/204982    International Application No.:    PCT/AU2018/050438
Publication Date: Fri Nov 16 00:59:59 CET 2018 International Filing Date: Sat May 12 01:59:59 CEST 2018
IPC: B41M 3/14
B42D 25/30
Applicants: CCL SECURE PTY LTD
Inventors: JAMES, Randall P
LONG, Michael D
NEWCOMB, Diana
POWER, Gary Fairless
Title: AN OPTICAL SECURITY DEVICE AND METHOD OF MANUFACTURE
Abstract:
A security device is disclosed including a substrate and one or more focusing elements or lens structures located on one side of the substrate. The security device includes a plurality of image elements associated with each focusing element wherein the image elements include at least first and second groups of image elements. Each image element may be composed of pixels located in an object plane to be viewable through the associated focusing element. Each image element comprises a diffractive grating element or sub-wavelength grating element which when illuminated by a light source generates a diffraction image observable at a range of viewing angles around the device. Image elements of the first group are visible in a first range of viewing angles and image elements of the second group are visible in a second range of viewing angles. The security device is particularly suitable for use on security documents, such as banknotes. A method of forming a security device is also disclosed.