Optical power control apparatus, optical beam scanning apparatus, image forming apparatus, and optical power control method
US7535939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2007 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jul 4, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/471
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An optical power control apparatus includes a changing unit which changes, a plurality of number of times, the value of a current flowing to an optical beam output apparatus, and an obtaining unit which obtains, in correspondence with each current value, a peripheral optical power representing an optical power at the peripheral part of the spot of the optical beam output from the optical beam output apparatus. The optical power control apparatus also includes a correction unit which corrects the peripheral optical power so that the peripheral optical power and a central optical power representing an optical power at the central part of the spot have an approximately linear relationship in correspondence with each current value. The optical power control apparatus also includes a control unit which controls the optical power of the optical beam output from the optical beam output apparatus in accordance with the corrected peripheral optical power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.