Producing images of security features
US10082769B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2012 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Apr 10, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Processes and systems are described that can produce images including both three dimensional holographic images and two dimensional variable data, which can provide personalized security features in a document. A photosensitive film can be pressed against a first reflective optical device. A laser beam can be directed through a selected first area of the photosensitive film onto the first reflective optical device to produce a three dimensional holographic image in the photosensitive film. A previously masked second area of the photosensitive film can be pressed against a second reflective optical device. The laser beam can project an image constructed by a spatial light modulator and can be directed through the second area of the photosensitive film onto the second reflective optical device to produce a two dimensional image in the second area. During the process, the web tension of the photosensitive film is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.