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公开(公告)号：US5930019A
公开(公告)日：1999-07-27
申请号：US990531
申请日：1997-12-15
CPC分类号： G02B26/123 , H04N1/047 , H04N1/0473 , H04N1/192 , H04N1/1135 , H04N1/12 , H04N2201/04712 , H04N2201/04729 , H04N2201/04731 , H04N2201/04787 , H04N2201/04789 , H04N2201/04791
摘要： A light scanning device deflects a plurality of light beams by a deflecting means performs divided scanning on a single scanning line on a photoconductor with the plurality of deflected light beams. When the scanning line is scanned, a detecting means detects a light beam passing through a predetermined position in front of a position where the light beam first strikes an image forming range on the photoconductor. An oscillating means oscillates a specified number of clocks in a time interval from when the light beam is detected by the detecting means until it is detected thereby again. An adjusting means makes adjustments so as to irradiate a plurality of light beams based on clocks oscillated by the oscillating means. In a time interval after the light beam is detected by the detecting means until it is detected thereby again, a plurality of light beams are irradiated based on the specified number of clocks. Therefore, even if unevenness occurs in the deflecting speed of the deflecting means, dots can be formed at the same intervals in scanning a plurality of scanning lines. Thus, it is possible to prevent discontinuous joints occurring in each of the images formed with a plurality of light beams.
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2.发明授权Light scanning device, optical device, and scanning method of optical device 失效光扫描装置，光学装置和光学装置的扫描方法
公开(公告)号：US6038051A
公开(公告)日：2000-03-14
申请号：US309911
申请日：1999-05-11
CPC分类号： G02B26/123 , H04N1/047 , H04N1/0473 , H04N1/192 , H04N1/1135 , H04N1/12 , H04N2201/04712 , H04N2201/04729 , H04N2201/04731 , H04N2201/04787 , H04N2201/04789 , H04N2201/04791
摘要： A light scanning device deflects a plurality of light beams by a deflecting means performs divided scanning on a single scanning line on a photoconductor with the plurality of deflected light beams. When the scanning line is scanned, a detecting means detects a light beam passing through a predetermined position in front of a position where the light beam first strikes an image forming range on the photoconductor. An oscillating means oscillates a specified number of clocks in a time interval from when the light beam is detected by the detecting means until it is detected thereby again. An adjusting means makes adjustments so as to irradiate a plurality of light beams based on clocks oscillated by the oscillating means. In a time interval after the light beam is detected by the detecting means until it is detected thereby again, a plurality of light beams are irradiated based on the specified number of clocks. Therefore, even if unevenness occurs in the deflecting speed of the deflecting means, dots can be formed at the same intervals in scanning a plurality of scanning lines. Thus, it is possible to prevent discontinuous joints occurring in each of the images formed with a plurality of light beams.
摘要翻译： 光扫描装置通过偏转装置偏转多个光束，在多个偏转光束的光电导体上的单个扫描线上进行分割扫描。 当扫描线被扫描时，检测装置检测通过光束首先照射到感光体上的图像形成范围的位置前方的预定位置的光束。 振荡装置在由检测装置检测到光束的时间间隔内振荡指定数量的时钟，直到被再次检测为止。 调整装置进行调整，以便基于由振荡装置振荡的时钟照射多个光束。 在通过检测装置检测到光束直至其被再次检测到的时间间隔之后，基于指定的时钟数来照射多个光束。 因此，即使偏转装置的偏转速度发生不均匀，也可以在扫描多条扫描线时以相同的间隔形成点。 因此，可以防止在形成有多个光束的每个图像中发生不连续的关节。
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3.发明授权Light scanning device, optical device, and scanning method of optical device 失效光扫描装置，光学装置和光学装置的扫描方法公开(公告)号：US06172788B2
公开(公告)日：2001-01-09
申请号：US09490077
申请日：2000-01-24
IPC分类号： G02B2608
CPC分类号： G02B26/123 , H04N1/047 , H04N1/0473 , H04N1/1135 , H04N1/12 , H04N1/192 , H04N2201/03158 , H04N2201/03162 , H04N2201/0471 , H04N2201/04712 , H04N2201/04729 , H04N2201/04731 , H04N2201/04732 , H04N2201/04734 , H04N2201/04744 , H04N2201/04767 , H04N2201/04787 , H04N2201/04789 , H04N2201/04791
摘要： A light scanning device deflects a plurality of light beams by a deflecting means performs divided scanning on a single scanning line on a photoconductor with the plurality of deflected light beams. When the scanning line is scanned, a detecting means detects a light beam passing through a predetermined position in front of a position where the light beam first strikes an image forming range on the photoconductor. An oscillating means oscillates a specified number of clocks in a time interval from when the light beam is detected by the detecting means until it is detected thereby again. An adjusting means makes adjustments so as to irradiate a plurality of light beams based on clocks oscillated by the oscillating means. In a time interval after the light beam is detected by the detecting means until it is detected thereby again, a plurality of light beams are irradiated based on the specified number of clocks. Therefore, even if unevenness occurs in the deflecting speed of the deflecting means, dots can be formed at the same intervals in scanning a plurality of scanning lines. Thus, it is possible to prevent discontinuous joints occurring in each of the images formed with a plurality of light beams.
摘要翻译： 光扫描装置通过偏转装置偏转多个光束，在多个偏转光束的光电导体上的单个扫描线上进行分割扫描。 当扫描线被扫描时，检测装置检测通过光束首先在光电导体上的图像形成范围的位置前面的预定位置的光束。 振荡装置在由检测装置检测到光束的时间间隔内振荡指定数量的时钟，直到被再次检测为止。 调整装置进行调整，以便基于由振荡装置振荡的时钟照射多个光束。 在通过检测装置检测到光束直至其被再次检测到的时间间隔之后，基于指定的时钟数来照射多个光束。 因此，即使偏转装置的偏转速度发生不均匀，也可以在扫描多条扫描线时以相同的间隔形成点。 因此，可以防止在形成有多个光束的每个图像中发生不连续的关节。
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公开(公告)号：US5694236A
公开(公告)日：1997-12-02
申请号：US720005
申请日：1996-09-27
申请人： Yoshihito Sekikawa
发明人： Yoshihito Sekikawa
CPC分类号： G02B26/12
摘要： An optical scanning device having: a beam diameter shaping optical system which shapes a diameter of a light beam from a light source and focuses the light beam as a line image which is long in a direction corresponding to a main scanning direction; polygon mirror having a reflecting surface at one of a focusing position and a vicinity of the focusing position of the line image, the polygon mirror deflecting a light beam, which is incident on the polygon mirror, at a uniform angular speed in the direction corresponding to the main scanning direction; a cylindrical mirror disposed at a light beam reflecting side of the polygon mirror, the cylindrical mirror having power to converge a light beam in only a subscanning direction which is orthogonal to the main scanning direction, and converging a light beam on a surface-to-be-scanned; and an f .theta. lens system disposed between the polygon mirror and the cylindrical mirror, and having power to converge a light beam only in a main scanning direction, and converging a light beam, which is incident on the f .theta. lens system, onto the surface-to-be-scanned via the cylindrical mirror so that a light spot is scanned at a uniform speed. Because the f .theta. lens system only has power in the main scanning direction, a configuration of each lens of the f .theta. lens system can be made simple and compact.
摘要翻译： 一种光学扫描装置，其具有：光束直径整形光学系统，其对来自光源的光束的直径进行成形，并将所述光束聚焦成在与主扫描方向对应的方向上长的线像; 多面镜具有在聚焦位置和线图像的聚焦位置附近的一个处的反射表面，多角镜以相对于对角线方向的方向以均匀的角速度偏转入射在多面镜上的光束 主扫描方向; 设置在所述多面体反射镜的光束反射侧的圆筒形反射镜，所述圆柱形反射镜具有仅沿与所述主扫描方向正交的副扫描方向会聚光束的功率，并且将光束会聚在表面 - 被扫描; 以及设置在多面镜和圆柱形反射镜之间的fθ透镜系统，并且具有仅在主扫描方向上会聚光束的功率，并且将入射到fθ透镜系统上的光束会聚在表面上 通过圆柱形镜子进行扫描，以便以均匀的速度扫描光斑。 因为fθ透镜系统仅在主扫描方向上具有功率，所以可以使fθ透镜系统的每个透镜的配置变得简单和紧凑。
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5.发明授权公开(公告)号：US07133628B2
公开(公告)日：2006-11-07
申请号：US10793231
申请日：2004-03-05
IPC分类号： G03G15/01
CPC分类号： G03G15/011 , G03G15/04045 , G03G2215/0177 , G03G2215/0404 , G03G2221/1636
摘要： An image forming apparatus includes an image carrier, a rotary developer unit having a developing roll opposed to the image carrier when located at a developing position and an exposure device for writing a latent image onto the image carrier, wherein an optical path from the exposure device to the image carrier passes within a circumscribed circle of the developing roll with the center of rotation of the rotary developer unit as the center of the circle. The image carrier is located so as to provide the developing position above a horizontal line passing the center of rotation of the rotary developer unit, and the exposure device is located so as to provide a beam exit position below the horizontal line.
摘要翻译： 图像形成装置包括图像载体，具有与位于显影位置的图像载体相对的显影辊的旋转显影剂单元和用于将潜像写入图像载体的曝光装置，其中来自曝光装置的光路 图像载体在旋转显影剂单元的旋转中心作为圆的中心的情况下在显影辊的外接圆内通过。 图像载体被定位成在通过旋转显影剂单元的旋转中心的水平线上方提供显影位置，并且曝光装置被定位成在水平线下方提供光束出射位置。
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公开(公告)号：US20050069346A1
公开(公告)日：2005-03-31
申请号：US10793231
申请日：2004-03-05
CPC分类号： G03G15/011 , G03G15/04045 , G03G2215/0177 , G03G2215/0404 , G03G2221/1636
摘要： An image forming apparatus includes an image carrier, a rotary developer unit having a developing roll opposed to the image carrier when located at a developing position and an exposure device for writing a latent image onto the image carrier, wherein an optical path from the exposure device to the image carrier passes within a circumscribed circle of the developing roll with the center of rotation of the rotary developer unit as the center of the circle. The image carrier is located so as to provide the developing position above a horizontal line passing the center of rotation of the rotary developer unit, and the exposure device is located so as to provide a beam exit position below the horizontal line.
摘要翻译： 图像形成装置包括图像载体，具有与位于显影位置的图像载体相对的显影辊的旋转显影剂单元和用于将潜像写入图像载体的曝光装置，其中来自曝光装置的光路 图像载体在旋转显影剂单元的旋转中心作为圆的中心的情况下在显影辊的外接圆内通过。 图像载体被定位成在通过旋转显影剂单元的旋转中心的水平线上方提供显影位置，并且曝光装置被定位成在水平线下方提供光束出射位置。
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公开(公告)号：US5774251A
公开(公告)日：1998-06-30
申请号：US740128
申请日：1996-10-24
申请人： Yoshihito Sekikawa
发明人： Yoshihito Sekikawa
CPC分类号： G02B26/12
摘要： An optical scanning apparatus includes: a rotational polygonal mirror, on the side of which a plurality of reflecting surfaces are provided, the reflecting surfaces deflecting a beam of incident light in the primary scanning direction at a substantially equal angular velocity; a first optical system for forming a beam of light sent from the light source into an image long in the primary scanning direction in such a manner that the formed image strides over the plurality of deflecting surfaces; and an f.theta. lens for converging the beam of light deflected on the deflecting surface at a position close to the surface of the photoreceptor drum so that a spot of light irradiated on the photoreceptor drum can be moved at a substantially equal speed. In the optical scanning apparatus, the angles .alpha. and .beta. satisfy the following expression: (cos((.beta.+.alpha.).div.2)).div.(cos((.beta.-.alpha.).div.2)).gtoreq.0.75where .alpha. is the maximum deflection angle of the deflection luminous flux with respect to the optical axis of the .theta. lens, and .beta. is an angle formed between the optical axis of the first optical system projected in the subsidiary scanning direction and the optical axis.
摘要翻译： 光学扫描装置包括：旋转多面镜，其侧面设置有多个反射表面，所述反射表面以大致相等的角速度在一次扫描方向上偏转入射光束; 第一光学系统，用于形成从所述光源发出的光束到所述主扫描方向上长的图像，使得形成的图像跨越所述多个偏转表面; 以及fθ透镜，用于使偏转在偏转表面上的光束会聚在靠近感光鼓表面的位置处，使得照射在感光鼓上的光点能够以基本相等的速度移动。 在光学扫描装置中，角度α和β满足以下表达式：（cos（（beta + alpha）DIVIDED 2））DIVIDED（cos（（β-α）DIVIDED 2））> / = 0.75其中α是最大值 偏转光通量相对于θ透镜的光轴的偏转角，β是在副扫描方向上投影的第一光学系统的光轴与光轴之间形成的角度。
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公开(公告)号：US5600495A
公开(公告)日：1997-02-04
申请号：US325477
申请日：1994-10-19
申请人： Yoshihito Sekikawa
发明人： Yoshihito Sekikawa
CPC分类号： G02B13/0005
摘要： Of lenses constituting an f.multidot..theta. lens, with respect to the lens L2 having a greatest difference between absolute values of surface power at both surfaces thereof, a convex surface having a greater absolute value of surface power is made to abut through line contact against columnar abutment members projecting from the optical housing 10 perpendicularly to the scanning direction. In addition, flat portions provided at both ends of the lens in the scanning direction thereof are supported by supporting members, and the lens is affixed to the abutment members and by means of leaf springs.
摘要翻译： 构成fxθ透镜的透镜相对于在其两个表面的表面光焦度的绝对值之间具有最大差异的透镜L2，具有较大绝对值的表面光焦度的凸表面通过与柱状接触的线接触而抵接 构件从光学壳体10垂直于扫描方向突出。 此外，透镜的扫描方向的两端设置的平坦部由支撑部件支撑，透镜通过片簧固定。
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公开(公告)号：US06304360B1
公开(公告)日：2001-10-16
申请号：US09455454
申请日：1999-12-06
申请人： Yoshihito Sekikawa
发明人： Yoshihito Sekikawa
IPC分类号： G02B2608
CPC分类号： G02B26/123 , B41J2/473 , H04N1/506
摘要： The optical scanning device of the present invention which handles plural light beams reduces the number of the optical components to the minimum, and thereby intends to reduce the cost, shrink the size, and secure high performance. The optical scanning device of the present invention minimizes the number of deflectors that deflect light beams with a constant angular velocity in a direction corresponding to the main scanning direction to one, and also minimizes the number of polygon mirrors included in the deflector and the number of rotation drive units of the polygon mirror each to one. Further, the device makes up two f&thgr; lens systems for converging the light beams into a specific size and scanning the beam spots with a substantially constant speed with two pairs of the f&thgr; lenses each, and disposes the f&thgr; lens systems on the both sides of the deflector. Two light beams each fall on and go out from the f&thgr; lens systems, and the deflector performs the main scanning of these four light beams.
摘要翻译： 处理多个光束的本发明的光学扫描装置将光学部件的数量减少到最小，从而意图降低成本，缩小尺寸并确保高性能。 本发明的光学扫描装置将以与主扫描方向对应的方向上的恒定角速度的光束偏转到一个的偏转器的数量最小化，并且还使包括在偏转器中的多面镜的数量最小化 多面镜的旋转驱动单元分别为一个。 此外，该装置组成两个透镜系统，用于将光束会聚到特定尺寸，并且以两个大对的透镜各自以基本恒定的速度扫描光束点，并且将ftheta透镜系统放置在 导流板 两个光束每个都从ftheta透镜系统落下并离开，并且偏转器执行这四个光束的主扫描。
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公开(公告)号：US6075636A
公开(公告)日：2000-06-13
申请号：US196232
申请日：1998-11-20
申请人： Yoshihito Sekikawa
发明人： Yoshihito Sekikawa
CPC分类号： G02B26/123
摘要： An optical scanning device comprises a multi-faceted rotating polygon mirror for deflecting an incident beam in main scanning direction, a first light source for bringing a first beam into incidence on the polygon mirror at an angle of +.alpha. with respect to a central line connecting from a rotation center of the polygon mirror to a central position of a scanned surface, the first light source arranged such that the first beam is deflected at an angle of -2.alpha. by while the polygon mirror rotates at an angle of .alpha., a second light source for bringing a second beam into incidence on the polygon mirror at an angle of -.alpha. with respect to the central line, the second light source arranged such that the second beam is deflected at an angle of -2.alpha. by while the polygon mirror rotates at an angle of .alpha., a first reflecting mirror for scanning the scanned surface by reflecting the deflected first beam, the first reflecting mirror arranged so one end portion thereof as to cross over the central line and to avoid an unnecessary beam from reflection faces adjoining to a normal reflection face of the polygon mirror, and a second reflecting mirror for scanning the scanned surface by reflecting the deflected second beam.
摘要翻译： 光学扫描装置包括：多面旋转多面镜，用于沿主扫描方向偏转入射光束;第一光源，用于使第一光束相对于连接中心线以+α的角度入射在多面镜上 从所述多面镜的旋转中心到所述扫描表面的中心位置，所述第一光源被布置成使得所述第一光束以所述多角镜以α的角度以-2α的角度偏转， 光源，用于使第二光束相对于中心线以α的角度入射到多面镜上，第二光源被布置成使得第二光束以-2α的角度偏转，而多面镜 以α的角度旋转，第一反射镜，用于通过反射偏转的第一光束扫描扫描的表面，第一反射镜被布置成使其一端部交叉 并且避免来自与多面镜的正反射面相邻的反射面的不必要的光束，以及用于通过反射偏转的第二光束来扫描扫描表面的第二反射镜。
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