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    • 8. 发明授权
    • Optical scanning device and image forming apparatus
    • 光学扫描装置和图像形成装置
    • US08525863B2
    • 2013-09-03
    • US13160578
    • 2011-06-15
    • Kenzo OhkuboNobuhiro ShiraiTakasumi Wada
    • Kenzo OhkuboNobuhiro ShiraiTakasumi Wada
    • B41J15/14B41J27/00
    • G02B26/123G03G15/04072G03G15/0435G03G2215/0404
    • An optical scanning device includes an enclosure having a plurality of windows covered with transparent members. The enclosure houses a plurality of light sources, a scanning portion, optical elements and a light amount attenuation portion. The scanning portion deflects each of a plurality of light beams emitted from a plurality of light sources at a constant angular speed in a main scanning direction. The optical elements constitute respective light paths from the scanning portion to the windows for the plurality of light beams, respectively. The light amount attenuation portion attenuates light amount in a light path of a first light source among the plurality of light sources in a downstream side of the position where a light beam emitted from a second light source enters as stray light. The drive portion drives the first light source so as to compensate for light amount attenuated by the light amount attenuation portion.
    • 光学扫描装置包括具有被透明构件覆盖的多个窗口的外壳。 外壳容纳多个光源,扫描部分,光学元件和光量衰减部分。 扫描部分以主扫描方向以恒定角速度偏转从多个光源发射的多个光束中的每一个。 光学元件分别构成从多个光束的扫描部到窗的各自的光路。 光量衰减部分使从第二光源发射的光束进入杂散光的位置的下游侧的多个光源中的第一光源的光路中的光量衰减。 驱动部分驱动第一光源以补偿由光量衰减部分衰减的光量。
    • 10. 发明授权
    • Laser scanning optical system and image forming apparatus
    • 激光扫描光学系统和成像设备
    • US07755809B2
    • 2010-07-13
    • US11563220
    • 2006-11-27
    • Hirokazu FujitaKenzo OhkuboTakasumi WadaYasuhiro OnoTakayuki Ohno
    • Hirokazu FujitaKenzo OhkuboTakasumi WadaYasuhiro OnoTakayuki Ohno
    • H04N1/04
    • G02B26/125G02B19/0014G02B19/0052G02B27/0911
    • A laser scanning optical system converts a plurality of beams emitted from the laser diode (LD) into parallel light using a collimator lens, shapes the parallel light using an aperture, and executes exposure of a plurality of lines simultaneously on a photoreceptor drum. To cause a necessary emitting point interval d determined uniquely from the magnification of the optical system to coincide with an emitting point interval of the LD used, the LD is rotated by an angle θ against the main optical axis plane thereof. In this case, a converting device that converts the aspect ratio of a profile of the light beam emitted from the LD is provided. A conversion characteristic of the converting device is adjusted such that the characteristic is matched with a condition within a predetermined region following a characteristic of the optical system.
    • 激光扫描光学系统使用准直透镜将从激光二极管(LD)发射的多个光束转换为平行光,并使用光圈对平行光进行成形,并且在感光鼓上同时执行多条线的曝光。 为了使从光学系统的放大率唯一确定的必要的发射点间隔d与所使用的LD的发射点间隔一致,LD旋转角度& 抵靠其主光轴平面。 在这种情况下,提供转换装置,其转换从LD发射的光束的轮廓的纵横比。 调整转换装置的转换特性,使得该特性与遵循光学系统的特性的预定区域内的条件相匹配。