Method of preparing a hologram
US4748097A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Jun 24, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of preparing a hologram which comprises subjecting holographic material to a holographic exposure, the holographic material comprising silver halide emulsion of which at least 80% by weight of the halide is bromide, developing the exposed material in a silver halide developing solution to yield developed silver, converting the developed silver to silver chloride using a bleaching agent selected from ferric ions, persulphate ions, chlorate ions, peroxides and water-soluble quinones, in the presence of chloride ions and then fixing out the silver chloride using a silver halide fixing agent which dissolves silver chloride but not silver bromide or silver iodobromide under the conditions of use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.