Scanning apparatus for preventing defocus aberration
US7826108B2 · kind B2 · utility
0Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2008 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Jul 18, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/03145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanning apparatus for preventing defocus aberration is provided. The scanning apparatus includes a flatbed scanning portion and a scanning module. The flatbed scanning portion includes a glass platform. The scanning module includes a scanning module case, a light source, multiple reflective mirrors, a lens, an optical sensing element, a printed circuit board and a metallic post. The metallic post is interconnected between the scanning module case and the printed circuit board. The printed circuit board is not in direct contact with the scanning module case so as to prevent defocus aberration resulting from thermal expansion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.