Method and apparatus for dehydrating dichromatic gelatin holograms
US4853306A · kind A · utility
16Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1987 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Sep 21, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of manufacturing optical elements, such as for head-up displays, from holographically recorded interference patterns in a dichromatic gelatin is disclosed. The exposed hologram pattern is developed through hydration, the hydrated hologram gelatin is dehydrated by contacting the hydrated gelatin with a mixture of isopropyl alcohol and an inert anhydrous fluid, such as a liquid fluorinated hydrocarbon solution. The dehydrated hologram pattern can then be subsequently stabilized, for example, by baking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.