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    • 3. 发明申请
    • Image forming apparatus and scanning unit
    • 图像形成装置和扫描单元
    • US20060066712A1
    • 2006-03-30
    • US11235315
    • 2005-09-27
    • Toshio Sakai
    • Toshio Sakai
    • B41J15/14
    • B41J2/473G02B7/022G02B26/123G02B26/125H04N1/1135
    • An image forming apparatus includes a photosensitive member and a scanning lens. The photosensitive member bears a latent image thereon and defines a main scanning direction. The scanning lens transmits a light beam scanningly deflected in the main scanning direction for exposing the photosensitive member to the light beam to form the latent image thereon. The scanning lens includes a lens body and a rib. The lens body is formed of resin and extends substantially in the main scanning direction. The lens body defines a sub-scanning direction perpendicular to the main scanning direction. The lens body has opposite surfaces that are both substantially perpendicular to the sub-scanning direction. The rib is formed integrally with the lens body and protrudes in the sub-scanning direction from either one of the opposite surfaces. The rib extends over a predetermined range in the main scanning direction.
    • 图像形成装置包括感光构件和扫描透镜。 感光构件在其上承载潜像并限定主扫描方向。 扫描透镜透射沿主扫描方向扫描偏转的光束,用于将感光构件暴露于光束以在其上形成潜像。 扫描透镜包括透镜体和肋。 透镜体由树脂形成并且基本上沿主扫描方向延伸。 透镜体定义垂直于主扫描方向的副扫描方向。 透镜体具有基本上垂直于副扫描方向的相对表面。 所述肋与所述透镜体一体地形成,并且从所述相反面中的任一个向副扫描方向突出。 肋沿主扫描方向延伸超过预定范围。