Apparatus of alignment for scanner and a method of the same
US6282331A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2000 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Sep 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An alignment pad is set in front of the image sensor. A lens is set between the alignment pad and the image sensor. The alignment pad includes a set of boundary alignment patterns. At least one sets of resolution analysis patterns are formed on the alignment pad. Each set of the resolution analysis pattern includes a horizontal analysis resolution pattern and a vertical resolution analysis pattern. The horizontal analysis resolution pattern is consisted of a plurality of vertical lines to analyze the horizontal resolution of the lens. The vertical resolution analysis pattern is consisted of a plurality of oblique lines to analyze the vertical resolution of the lens. The signals detected by the image sensor is fed to an application specific integrated circuits (ASIC) to generate a collation data. Subsequently, the collation data is fed into a buffer to store the data. A computer is responsive to these signal, and displays the collation data on the monitor in gray mode for collation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.