Hologram
US5604611A · kind A · utility
103Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1994 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Feb 15, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hologram includes an optically transparent base plate having first and second opposite surfaces. A hologram element is provided on the first surface of the base plate, and has a predetermined holographic pattern. An optically transparent member has first and second opposite surfaces. The first surface of the member faces the hologram element. An arrangement serves to prevent light, which successively passes through the transparent base plate, the hologram element, and the member and is then reflected at a boundary between the second surface of the member and an atmosphere, from travelling back to the hologram element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.