Hologram screen
US6829066B2 · kind B2 · utility
0Cited by
11References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2001 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Dec 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2001/0232
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a hologram screen which is capable of preventing separation, and damage to, a hologram film and which permits the hologram film to be reused easily. The present invention relates to a hologram screen that is comprised of a hologram film having the function of diffracting the light projected from a projector, and first and second transparent members that together sandwich the hologram film from the front and back surfaces thereof so as to cover the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.