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    Optical scanning apparatus and image forming apparatus having defective light source detection
    3.
    发明授权
    Optical scanning apparatus and image forming apparatus having defective light source detection 有权
    具有缺陷光源检测的光学扫描装置和图像形成装置

    公开(公告)号：US06376837B1

    公开(公告)日：2002-04-23

    申请号：US09500731

    申请日：2000-02-09

    申请人： Akihisa Itabashi ,  Magane Aoki ,  Akira Kojima ,  Hiroyuki Suhara ,  Nobuaki Kubo ,  Tomoya Ohsugi

    发明人： Akihisa Itabashi ,  Magane Aoki ,  Akira Kojima ,  Hiroyuki Suhara ,  Nobuaki Kubo ,  Tomoya Ohsugi

    IPC分类号： H01J314

    CPC分类号： H04N1/1906 ,  B41J2/471 ,  G02B26/123 ,  G02B26/127 ,  G06K15/1261 ,  G06K2215/0085 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/03108 ,  H04N2201/0471 ,  H04N2201/04744 ,  H04N2201/04755 ,  H04N2201/04756

    摘要： An optical scanning apparatus is constructed to detect one or more defective or damaged light emitting devices of a light source unit and forms images having substantially the same quality as that of the images formed when all of a plurality of light emitting devices of a light source of the apparatus are functioning normally even when any one of the plurality of light emitting devices are damaged or broken, without decreasing the image forming performance of the apparatus. The optical scanning apparatus detects one or more damaged or broken light emitting devices and then compensates for the light omitted due to the damaged or broken light emitting devices using the normally functioning light emitting devices without decreasing the image forming speed or quality of the optical scanning apparatus. In order to compensate for a defective light emitting device, the optical scanning apparatus uses various solutions such as increasing the rotating speed of the deflector while increasing the modulation speed of the light emitting devices by the same amount, increasing beam spot diameter in the subscanning direction, changing the output power of the light emitting devices on a surface to be scanned in order to increase beam spot diameter in the main scanning direction and the subscanning direction, and changing the focal length of the line image forming optical apparatus and increasing either the rotation speed of the deflector or the rotation speed of the surface to be scanned or photoconductive drum.

    摘要翻译： 光学扫描装置被构造为检测光源单元的一个或多个有缺陷或损坏的发光装置，并且形成具有与所有图像的质量基本相同的图像的图像， 即使当多个发光装置中的任何一个发光装置被损坏或破坏时，装置也正常工作，而不会降低装置的图像形成性能。 光扫描装置检测一个或多个损坏或破损的发光装置，然后补偿由于使用正常功能的发光装置的损坏或破损的发光装置而省略的光，而不降低光学扫描装置的图像形成速度或质量 。 为了补偿有缺陷的发光装置，光扫描装置使用各种解决方案，例如增加偏转器的旋转速度，同时增加发光装置的调制速度相同的量，增加副扫描方向上的光点直径 改变要扫描的表面上的发光装置的输出功率，以增加主扫描方向和副扫描方向上的光点直径，并且改变线图像形成光学装置的焦距并增加旋转 偏转器的速度或待扫描表面或感光鼓的旋转速度。

    Multi-beam optical scanning apparatus and image forming apparatus
    7.
    发明授权
    Multi-beam optical scanning apparatus and image forming apparatus 有权
    多光束光学扫描装置和成像装置

    公开(公告)号：US07006120B2

    公开(公告)日：2006-02-28

    申请号：US10635520

    申请日：2003-08-07

    申请人： Kohji Sakai ,  Magane Aoki ,  Yoshinori Hayashi ,  Seizo Suzuki ,  Hiromichi Atsuumi

    发明人： Kohji Sakai ,  Magane Aoki ,  Yoshinori Hayashi ,  Seizo Suzuki ,  Hiromichi Atsuumi

    IPC分类号： B41J27/00

    CPC分类号： B41J2/473

    摘要： A multi-beam optical scanning apparatus includes a semiconductor laser array slanted relative to a sub-scanning direction and emitting a plurality of optical beams; a coupling lens converting a shape of each optical beam emitted from the semiconductor laser array; and an aperture with an opening having a size of Am×As, arranged after the coupling lens in a direction in which the optical beam progresses, where Am is a dimension of the opening in a main scanning direction and As is a dimension of the opening in the sub-scanning direction. When a length in the main scanning direction of a contour line defined by 1/e2 strength of a maximum strength of an optical beam at the position of the aperture is Lm, and a length in the sub-scanning direction of the contour line defined by 1/e2 strength of the maximum strength of the optical beam at the position of the aperture is Ls, the following conditional expressions are satisfied: Am

    摘要翻译： 多光束光学扫描装置包括相对于副扫描方向倾斜并发射多个光束的半导体激光器阵列; 转换从半导体激光器阵列发射的每个光束的形状的耦合透镜; 以及具有尺寸为A mA x A s s的开口的孔，沿着光束进行的方向设置在耦合透镜之后，其中A m 是主扫描方向上的开口的尺寸，A S是子扫描方向上的开口的尺寸。 当在孔径的位置处的光束的最大强度的1 / e 2强度确定的轮廓线的主扫描方向上的长度为L / 并且在孔径的位置处的光束的最大强度的强度的1 / e 2强度限定的轮廓线的副扫描方向上的长度为L / SUB>，满足以下条件表达式

    Optical scanning device, line-image forming optical system therein, imaging adjustment method in the device and image forming apparatus
    10.
    发明授权
    Optical scanning device, line-image forming optical system therein, imaging adjustment method in the device and image forming apparatus 失效

    公开(公告)号：US06606179B2

    公开(公告)日：2003-08-12

    申请号：US10279848

    申请日：2002-10-25

    申请人： Seizo Suzuki ,  Magane Aoki ,  Hiromichi Atsuumi ,  Kohji Sakai

    发明人： Seizo Suzuki ,  Magane Aoki ,  Hiromichi Atsuumi ,  Kohji Sakai

    IPC分类号： G02B2608

    CPC分类号： G02B26/128

    摘要： A light source emitting a light flux; a coupling optical system couples the light flux from the light source to a subsequent optical system by transforming it into a parallel light flux, an approximately convergent light flux or an approximately divergent light flux; a light deflector reflects the light flux from the coupling optical system with a deflection reflective surface, and deflects it; a scanning and imaging optical system condenses the deflected light flux from the light deflector onto a surface to be scanned as a beam spot; and a correcting optical system is provided for self correcting shift of focal position of the beam spot on the surface to be scanned occurring due to environmental change or the like. The correcting optical system comprises at least one pair of a resin-made lens having an anamorphic surface having a negative power in each of main scanning direction and sub-scanning direction and a glass-made lens having an anamorphic surface having a positive power at least in sub-scanning direction, and is disposed between the coupling optical system and deflection reflective surface.