Stacked image sensor with cascaded optical edge pass filters
US9184198B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Jan 24, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/809
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color sensitive image sensor includes first, second, and third image sensor layers vertically aligned in an image sensor stack. Each of the image sensor layers includes a pixel array oriented to generate image data in response to light incident on the image sensor stack and readout circuitry coupled to the pixel array to readout the image data. A first optical filter layer is disposed between the first image sensor layer and the second image sensor layer and has a first edge pass filter characteristic with a first cutoff wavelength. A second optical filter layer is disposed between the second image sensor layer and the third image sensor layer and has a second edge pass filter characteristic with a second cutoff wavelength offset from the first cutoff wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.