Optical scanning apparatus and image forming apparatus comprising the same
US7782511B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2007 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Sep 2, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04781
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanning apparatus includes a laser diode, electro-optical crystal member, BD sensor, two light detection sensors and voltage control unit. The electro-optical crystal member is arranged in the optical path between the laser diode and a polygon mirror, and deflects the light beam in the sub-scanning direction by applied voltage. The BD sensor and two light detection sensors detect the light beam deflected in the sub-scanning direction. A scanning control unit controls, based on the detection results obtained by the BD sensor and two light detection sensors, the irradiation position of the light beam on a photosensitive drum. The BD sensor and two light detection sensors are arranged at positions distant in the sub-scanning direction from an optical path to the photosensitive drum and at the central portion and two end portions of an image forming region in the main scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.