Multicolor holograms using gelatin as the binder and method for producing the same
US4816360A · kind A · utility
5Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1986 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Dec 10, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/48
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Multicolor holograms using gelatin as the binder and having interference fringes lying in layers parallel to the substrate, the colors of which are visible by reflection in incident natural light, by treating the holographic material which has been holographically exposed and processed to produce a hologram therein, by applying to the selected areas of the gelatin which contains the interference fringes a solution of a compound which causes the interference fringes to separate permanently and produce a bathochromic shift in the replay wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.