Color filter array for area image sensors
US4979803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Feb 2, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color filter array for an area image sensor comprises a plurality of color filters formed on the sensor which selectively filter different colors of light. Each color filter includes a bottom semi-transparent partially reflected silver layer, a transparent, absorption free, dielectric layer formed on the bottom layer and having a thickness selected to correspond to wavelengths of light which are to pass into the image sensor, and a top semi-transparent partially reflected silver layer formed on the dielectric layer. The arrangement is that different colors of light selectively pass through the filter array into the corresponding potential wells of the area image sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.