Method for automated testing of the modulation transfer function in image sensors
US7215361B2 · kind B2 · utility
5Cited by
6References
60Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2003 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Mar 25, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for automatically measuring the modulation transfer function of an imager is disclosed. A opaque mask is placed over selected columns and rows of the imager during fabrication. In the course of an automated process, photons are uniformly shone over the image sensor. The amount of the input signal that flows from the unmasked pixel cells to the masked pixel cells can then be measured and the modulation transfer function can be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.