Optical radiation device, image reader, and image forming device
US8848262B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2012 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Nov 28, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/02885
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical radiation device includes a long light source unit in which light emitting elements are arranged in array, a long substrate on which the light source unit is mounted, a long optical guide to guide the light beams from the light emitting elements to a predetermined plane, and an optical collector to collect the light beams reflected by the predetermined plane. The length of an effective read area from a reading center of the optical collector to one end of the predetermined plane is different from that of an effective read area from the reading center to the other end thereof. The optical guide formed by injection molding includes a gate at one end in a length direction and a surface at the other end to exert total reflection, and is disposed so that the gate is positioned on the a same side as a shorter effective read area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.