Hologram screen and hologram display
US6952295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2002 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Nov 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0103
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hologram screen 1 displays an image by diffracting and scattering image light 31 projected from an image projection apparatus 2. An upward/downward light scattering device 13, which scatters light incident from an upward/downward specific angle range spreading obliquely upward or downward, is placed on the image projection apparatus side of a hologram device 12 in the hologram screen 1. A leftward/rightward light scattering device 14, which scatters light incident from a leftward/rightward specific angle range spreading obliquely leftward and rightward, is placed between the hologram device 12 and the scattering device 13. The construction is such that the upward/downward specific angle range contains the incidence angle of the image light 31 on the hologram screen 1, and thus provides a hologram screen having good color reproducibility and which permits viewing of the background.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.