Method for calibrating a light traveling distance in a scanning module
US5995231A · kind A · utility
0Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Nov 3, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0458
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method for altering the light traveling distance in an optical scanning module using transparent glass. The optical scanning module comprises a transparent glass module that refracts light to alter the traveling distance of the light as it passes from the document to the optical sensing device. The proper thickness of this transparent glass module is specifically chosen to correctly calibrate the error of the traveling distance of the light created during the manufacturing of the scanner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.