| Patent Number |
Title Of Patent |
Date Issued |
| 7626744 |
Optical scanning device and image forming apparatus |
December 1, 2009 |
| By setting elements within the range that predetermined conditions are satisfied, for example, so that a size of a rotating polygon mirror is minimized, the rotating polygon mirror is made compact while the eclipse of light beams in the main scanning direction is prevented. The cost |
| 7586661 |
Optical scanning device and image forming apparatus |
September 8, 2009 |
| A coupling optical system that includes a coupling lens, a linear-image forming lens, and an aperture couples light beams emitted from a light source to form a light flux. A deflector scans the light flux in a main scanning direction to form an image as a scanning line on a surface to be |
| 7554708 |
Optical scanning device and image forming apparatus |
June 30, 2009 |
| An optical scanning device includes a first optical element that converts a cross-section shape of a light beam from a semiconductor laser to a desired shape; a second optical element that guides the light beam output from the first optical element to an optical deflector that deflects t |
| 7545547 |
Scanning unit and image forming apparatus |
June 9, 2009 |
| A scanning optical system leads the light fluxes deflected by the polygon mirror to a photosensitive drum. An absolute value of a lateral magnification in a main scanning direction is larger than an absolute value of a lateral magnification in a sub-scanning direction. Moreover, a be |
| 7443558 |
Optical scanning device and image forming apparatus |
October 28, 2008 |
| An optical scanning device includes a first optical element that converts a cross-section shape of a light beam from a semiconductor laser to a desired shape; a second optical element that guides the light beam output from the first optical element to an optical deflector that deflects t |
| 7417777 |
Optical scanning device and image forming apparatus |
August 26, 2008 |
| A coupling lens arranged on an optical path of an optical beam from a VCSEL, which has a refraction plane and a diffraction plane that respectively change a power according to a temperature change and suppresses a beam-waist position change in a main-scanning direction and a sub-scan |
