3D optical projection device
US8534841B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2011 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Nov 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/356
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical projection device comprises an imaging device adapted to generate a first and a second image in a first and a second light beam, respectively, a first converting device that is adapted to convert a polarization state of one of the first and the second light beams into a converted polarization state, so that the first and the second light beams are in different polarization states, and a relay lens that is adapted to generate an intermediate image, by superimposing the first and the second images. The relay lens comprises a combining device, that is adapted to combine the first and the second light beams. The optical projection device further comprises a projection lens that is adapted to project the intermediate image onto a screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.