Thermal compensation of bi-directional alignment in a bi-directional laser scanning unit
US7817178B2 · kind B2 · utility
2Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2006 |
| Grant date | Oct 19, 2010 |
| Priority date | — |
| Expiry date | Aug 29, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/105
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Methods and apparatus include improving print quality of a bi-directionally scanning electrophotographic (EP) device, such as a laser printer or copy machine, according to temperature. A moving galvanometer or oscillator reflects a laser beam to create forward and reverse scan lines of a latent image. During use, the actual ambient temperature is obtained and used make corrections to improve print quality, such as by producing the latent image with a signal altered from an image data input signal to help ensure proper alignment of the forward and reverse scan lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.