Scaling and registration calibration especially in printed circuit board fabrication
US6819789B1 · kind B1 · utility
17Cited by
18References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2000 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Nov 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09918
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is disclosed for calibrating a camera used in a scanner for scanning images onto a printed circuit board. The calibration method determines a transformation between the camera and the scanner by writing a pattern on a photosensitized substrate using the scanner, where the pattern is visible without development, and using the camera to image the pattern, from which a transformation between the imager and scanner coordinate systems is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.