Image reading apparatus and image processing apparatus for reading optical information of visible and non-visible light
US5724152A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1993 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Dec 28, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To properly cut light except for visible light and improve read precision, there is provided an image reading apparatus having a plurality of photoelectric conversion elements. The image reading apparatus includes an image information detecting unit in which the photoelectric conversion elements are arranged on a single chip, a first light-shielding unit, arranged near the photoelectric conversion elements, for transmitting specific visible light, and a second light-shielding unit, arranged near the photoelectric conversion elements at a position different from that of the first light-shielding unit, for partially shielding light except for the visible light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.