Abstract: We describe techniques for recording a holographic image onto holographic recording film, in particular for security holograms. We thus describe a structure having a stack comprising the holographic recording film and a multichannel image generation device under the film. A three-dimensional object (or hologram of a 3D object) is provided, located under the multichannel image generation device. At least a portion of the multichannel image generation device is substantially transparent or absent in a region above the object. A holographic image is recorded in the film by illuminating the stack with laser light. The multichannel image generation device under the film may comprise a volume reflection hologram of a lenticularly generated image. The structure records a hologram of the 3D object in conjunction with a multi-channel holographic image.
Abstract: Improved techniques for using holograms to provide security for documents and the like. A method of providing a tamper-resistant pattern in association with a hologram on a substrate, the method including: preparing a hologram, the hologram being recorded in a photosensitive recording layer carried by a carrier; printing a pattern onto the photosensitive recording layer; and then attaching the hologram to a substrate by adhesive such that the pattern is between the photosensitive recording layer and the substrate to provide a tamper-resistant pattern in association with the hologram.
Type:
Grant
Filed:
August 22, 2008
Date of Patent:
May 29, 2012
Assignee:
Ver-Tec Security Systems Limited
Inventors:
David Roy Winterbottom, John David Wiltshire, Satyamoorthy Kabilian
Abstract: We describe methods of recording a holographic image onto holographic recording film, film bearing recorded holographic images, and apparatus for recording a holographic image onto film, in particular for security holograms.
Abstract: This invention relates to improved techniques for reading holograms, in particular volume reflection holograms, and to improved security documents incorporating volume reflection holograms.
Type:
Application
Filed:
January 23, 2006
Publication date:
June 18, 2009
Applicant:
VER-TEC SECURITY SYSTEMS LIMITED
Inventors:
John David Wiltshire, David Roy Winterbottom, Jonathan Fitt