Image sensor unit, and image reading apparatus and image forming apparatus using the same
US8643915B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 2012 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Jul 25, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0081
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor unit includes: a light guide reflecting light rays entering through a first light entering surface and a second light entering surface provided at both ends thereof, by a reflection surface to make the light rays exit through a light exiting surface and illuminates an original; a first light source provided near the first light entering surface; a second light source provided near the second light entering surface and different in wavelength from the first light source; and a first reflection part and a second reflection part provided on the reflection surface and composed of dot patterns constituted of two kinds of dots different in spectral reflectance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.