Security hologram, method of recording same, and method of using same wherein the holographic imaging includes a single coherent beam of electromagnetic radiation in combination with a Lloyd's mirror to provide both reference and object beams
US7710623B2 · kind B2 · utility
3Cited by
2References
3Claims
0Family size
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Key dates
| Filing date | Aug 20, 2007 |
| Grant date | May 4, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A security hologram is disclosed that is invisible to a human eye or to various optical detectors until the hologram is optically coupled to a suitable modifier (e.g., a prism). Also disclosed is a method of recording the security hologram and a method of using the hologram in security applications to establish authenticity of article(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.