System and method for improving the signal to noise ratio of a CCD sensor in an optical scanner
US5479207A · kind A · utility
13Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1994 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Feb 14, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/71
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for improving the signal to noise ratio of a CCD sensor within an optical scanner varies the exposure time of the CCD sensor. Exposure time is varied by clocking the CCD sensor a number of times equal to the number of pixels in the CCD sensor plus an additional number of clock cycles to create a delay. The additional exposure time maximizes the magnitudes of the charges produced by the CCD sensor. The required delay is computed during a pre-scan calibration step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.