Color separation prism assembly and method for making same
US6144498A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1999 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color separation device useful in information display systems is assembled from three prisms in an arrangement that provides for air equivalent thickness adjustment for each color. The air equivalent thickness adjustment provides for the correction of deviations in any of the three prisms, as well as providing a method to correct for the chromatic aberration arising from other optical elements in the information display system. The color separation device improves image quality and provides opportunities to lower the display system cost by using low tolerance components and/or plastic optical components normally having a high chromatic aberration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.