Method and apparatus for correcting visual aberrations in image projection systems
US6867928B2 · kind B2 · utility
1Cited by
15References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2003 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Feb 7, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/48
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
High spatial frequency optical noise in the form of intensity contrasting picture elements in the display of a projected light image on a bead-oriented image-enhancing filter is significantly reduced by interposing light-scattering material in the optical path between a source of the projected light image and the display in order to inhibit formation and interference of coherent light waves, and to mask the appearance of separate or discrete beaded apertures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.