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John David Wiltshire
John David Wiltshire, Colchester GB
| Patent application number | Description | Published |
|---|---|---|
| 20080285100 | Apparatus and Method for Producing a Hologram - The present invention relates to a method and apparatus for producing a hologram, in particular a dot matrix volume hologram. A holographic recording system ( | 11-20-2008 |
| 20110088050 | Holographic Film and Recording Method - This invention relates to holographic film for recording multicolor volume holograms, especially full color volume reflection holograms, and to manufacturing techniques for such film, and to corresponding methods of recording multicolor and full-color volume, in particular volume reflection holograms. We describe a holographic film for recording a multicolor volume hologram, the film comprising: a carrier; a first photosensitive recording layer sensitive to one or both of red and green laser light; and a second photosensitive recording layer sensitive to blue laser light. Both the first and second photosensitive recording layers comprise silver halide and have a grain size of less than 30 nm, and at least one of the photosensitive recording layers has a thickness of greater than 3 μm and less than 5 μm. | 04-14-2011 |
John David Wiltshire, Coggshall Essex GB
| Patent application number | Description | Published |
|---|---|---|
| 20100195175 | Security Holograms - 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. We thus describe a method of recording a holographic image onto holographic recording film ( | 08-05-2010 |
John David Wiltshire, Cambridgeshire GB
| Patent application number | Description | Published |
|---|---|---|
| 20080259417 | Holographic Recording Media - This invention relates to improved holographic recording media and to related methods and apparatus for fabricating and reading holograms. | 10-23-2008 |
| 20100027082 | SECURITY HOLOGRAMS - This invention relates to holograms employing colour addition techniques, and to methods and apparatus for the fabrication of such holograms. The holograms are particularly useful for security applications. | 02-04-2010 |
John David Wiltshire, Essex GB
| Patent application number | Description | Published |
|---|---|---|
| 20090207464 | Holograms and Hologram Fabrication Methods and Apparatus - This invention relates to improved methods of fabricating hologram systems, in particular holograms on a substrate such as a security document or bank note, to hologram systems fabricated by the described methods, and to starting materials for the methods. | 08-20-2009 |
John David Wiltshire, Copford GB
| Patent application number | Description | Published |
|---|---|---|
| 20090153926 | Hologram Imaging Techniques And Holograms - This invention relates to improved techniques for reading holograms, in particular volume reflection holograms, and to improved security documents incorporating volume reflection holograms. | 06-18-2009 |
John David Wiltshire, Cambridge GB
| Patent application number | Description | Published |
|---|---|---|
| 20090051986 | Security Holograms - This invention relates to 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 comprising: preparing a hologram, said hologram being recorded in a photosensitive recording layer carried by a carrier; printing a pattern onto said photosensitive recording layer; and then attaching said hologram to a substrate by adhesive such that said pattern is between said photosensitive recording layer and said substrate to provide a tamper-resistant pattern in association with said hologram. | 02-26-2009 |