Method and apparatus for multi-beam optical scanning capable of effectively adjusting a scanning line pitch
US6839157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2002 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Apr 16, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/1911
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanning apparatus includes light sources, an aperture having, and coupling lenses. Numbers of the light sources and the coupling lenses are equal to each other and the apparatus satisfies an inequality 12.7 <(D×β0×m0×xdpi)/(2×NA) <38.1 and an equation β0=(β+−β−)/(n−1), wherein D represents a width of the slit of the aperture, β0represents a beam open angle, mo represents a total lateral magnification ratio, dpi represents a number of dots per inch, NA represents a numerical aperture, β+ represents a positive open angle, β− represents a negative open angle, and n represents the number. Further, an image forming apparatus using this optical scanning apparatus and an image forming method are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.