Aberration compensation in image projection displays
US6536907B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Feb 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/702
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Optical projection systems for the display of electronic images often suffer from degraded image quality due to color field registration errors caused by lateral chromatic aberration. Although most projection lenses are partially corrected for lateral chromatic aberration during the design process, the uncorrected residual aberration limits the imaging performance of many projection displays, especially when displaying text and graphics with single-pixel-wide features. Some embodiments of the invention correct color field registration errors due to lateral chromatic aberration in multiple-imager projection systems. Other embodiments of the invention correct radial distortion and keystone distortion in single-imager and multiple-imager projection displays. In some embodiments of the invention, the imager(s) pixel geometry is arranged to compensate for optical aberrations, which result from the optical system so as to achieve a corrected image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.