Holograms
US4970129A · kind A · utility
116Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1988 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Mar 30, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Volume phase holograms and other holographic elements are disclosed which include microscopic areas of a material having an index of refraction different from that of the holographic fringes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.