Image forming apparatus using a plurality of lasers with a varying exposure ratio
US7782355B2 · kind B2 · utility
1Cited by
1References
3Claims
0Family size
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Key dates
| Filing date | May 12, 2008 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | May 13, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic latent image is formed by exposing the same exposure point on a photosensitive drum to a laser beam having an emission wavelength of 420 nm and a laser beam having an emission wavelength of 780 nm. The exposure is performed in a pulse-height modulation manner by changing a total output of these two laser beams to write the electrostatic latent image while changing an output ratio between the two laser beams depending on the total output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.