公开(公告)号：US06313906B1

公开(公告)日：2001-11-06

申请号：US09175543

申请日：1998-10-20

申请人： Yasushi Nagasaka ,  Jun Kohsaka ,  Kenji Takeshita

发明人： Yasushi Nagasaka ,  Jun Kohsaka ,  Kenji Takeshita

IPC分类号： G03B2754

CPC分类号： G02B26/123 ,  B41J2/473

摘要： Laser beams LK and LY are respectively emitted from laser diodes 51K and 51Y and incident on a mirror face of a polygon mirror 55 via collimator lenses 52K, 52Y and first cylindrical lenses 53K, 53Y. The laser beams LK and LY are reflected off the polygon mirror 55 and deflected. Incidence angles of the laser beams LK and LY are set so that the laser beams LK and LY intersect with each other at a position P which is located before the polygon mirror 55.

摘要翻译： 激光束LK和LY分别从激光二极管51K和51Y发射并通过准直透镜52K，52Y和第一柱面透镜53K，53Y入射到多面镜55的镜面上。 激光束LK和LY从多面镜55反射并偏转。 激光束LK和LY的入射角被设定为使得激光束LK和LY在位于多面镜55之前的位置P处彼此相交。

公开(公告)号：US06400488B1

公开(公告)日：2002-06-04

申请号：US09669894

申请日：2000-09-27

申请人： Yasushi Nagasaka ,  Jun Kohsaka ,  Kenji Takeshita

发明人： Yasushi Nagasaka ,  Jun Kohsaka ,  Kenji Takeshita

IPC分类号： G02B2608

CPC分类号： G02B26/12 ,  G02B26/121

摘要： A polygon mirror is enclosed in an airtight cap that is provided with a polygon window. By having the normal line to the surface of the polygon window tilt a predetermined angle in the main scanning direction with respect to the principal ray of the light beam that is to be applied to the polygon window, the reflected light, which is a part of the light beam reflected by the surface of the polygon window, is not applied to the image forming area of a photoconductive drum.

摘要翻译： 多面镜被封闭在设有多边形窗口的气密帽中。 通过使多边形窗口的表面的法线相对于要施加到多边形窗口的光束的主光线在主扫描方向上倾斜预定角度，反射光作为 由多边形窗口的表面反射的光束不被施加到感光鼓的图像形成区域。

公开(公告)号：US06341030B1

公开(公告)日：2002-01-22

申请号：US09613829

申请日：2000-07-11

申请人： Kenji Takeshita ,  Jun Kohsaka ,  Yasushi Nagasaka

发明人： Kenji Takeshita ,  Jun Kohsaka ,  Yasushi Nagasaka

IPC分类号： G02B2608

CPC分类号： G02B26/125

摘要： In an optical system, the scanning center axis of a scanning lens, the principal ray of a laser beam applied to the scanning lens, and the rotational axis of a polygon mirror are in one plane. By forming a thin film layer on the deflecting facets, the exposure quantity of a photo conductor, which decreases as the incident angle to the deflecting facet increases, is corrected. The thin film layer has the increasing ratio of the reflectance that increases as the incident angle, which principal ray of the laser beam forms with the normal line to the deflecting facet of the polygon mirror, increases.

摘要翻译： 在光学系统中，扫描透镜的扫描中心轴，施加到扫描透镜的激光束的主射线和多面镜的旋转轴在一个平面中。 通过在偏转小平面上形成薄膜层，校正随着偏转面的入射角度而减小的光导体的曝光量的增加。 薄膜层的反射率的比率随着入射角增加而增加，激光束的主光线与多边形反射镜的偏转小面的法线形成。

公开(公告)号：US5856669A

公开(公告)日：1999-01-05

申请号：US696066

申请日：1996-08-13

申请人： Yasushi Nagasaka ,  Kenji Takeshita ,  Hiroshi Hiraguchi ,  Jun Kohsaka ,  Nobuo Kanai ,  Keiji Ogoh

发明人： Yasushi Nagasaka ,  Kenji Takeshita ,  Hiroshi Hiraguchi ,  Jun Kohsaka ,  Nobuo Kanai ,  Keiji Ogoh

IPC分类号： B41J2/44 ,  B41J2/47 ,  G02B26/10 ,  G02B26/12 ,  G02B27/60

CPC分类号： B41J2/471 ,  G02B26/128 ,  G02B27/60

摘要： A laser beam scanning optical apparatus which has Moire fringes generating elements which is located near a position optically equivalent to a scanning surface and modulates a laser beam emitted from a laser source to generate Moire fringes. The Moire fringes generating elements comprises, for example, a first filter which has spatial grating and a second filter which has spatial grating which slants slightly with respect to the spatial grating of the first filter, the first filter and the second filter being arranged upstream and downstream respectively in an optical path. The laser beam scanning optical apparatus further has a light receiving element for receiving the Moire fringes generated by the Moire fringes generating elements. Focusing means for correcting a position of an image point of the laser beam is driven in accordance with an output of the light receiving element. For example, the light receiving element is a photoelectric element with a plurality of light receiving surfaces, each of which generates an electric signal in accordance with the laser beam incident thereto, and from a phase difference between the electric signals, the position of the image point is detected.

摘要翻译： 一种激光束扫描光学装置，其具有位于光学上等同于扫描表面的位置附近的莫尔条纹产生元件，并且调制从激光源发射的激光束以产生莫尔条纹。 莫尔条纹生成元件包括例如具有空间光栅的第一滤光器和具有相对于第一滤光器的空间光栅稍微倾斜的空间光栅的第二滤光器，第一滤光器和第二滤光器布置在上游， 分别在光路中。 激光束扫描光学装置还具有用于接收由莫尔条纹生成元件产生的莫尔条纹的光接收元件。 根据光接收元件的输出来驱动用于校正激光束的图像点的位置的聚焦装置。 例如，光接收元件是具有多个光接收表面的光电元件，每个光接收表面根据入射到其的激光束产生电信号，并且根据电信号之间的相位差，图像的位置 点检测。

公开(公告)号：US5969346A

公开(公告)日：1999-10-19

申请号：US887460

申请日：1997-07-02

申请人： Yasushi Nagasaka ,  Kenji Takeshita ,  Hiroshi Hiraguchi ,  Jun Kohsaka ,  Nobuo Kanai ,  Keiji Ogoh

发明人： Yasushi Nagasaka ,  Kenji Takeshita ,  Hiroshi Hiraguchi ,  Jun Kohsaka ,  Nobuo Kanai ,  Keiji Ogoh

IPC分类号： G02B26/12 ,  H01J3/14 ,  G01J1/20 ,  G02B26/08

CPC分类号： G02B26/128

摘要： A laser beam scanning optical apparatus which images and scans a laser beam emitted from a laser diode on a photo-sensitive drum through a focusing lens, a polygon mirror and an f.theta. lens. An SOS photosensor detects the scanned laser beam and generates a detection signal. The laser diode is controlled to perform pulse emission a specified time after the generation of the detection signal. The pulse beam is incident to a beam detector which adopts a knife edge method, and the amount of a focal shift is detected. The focusing lens is moved along the optical axis in accordance with the detected amount of a focal shift to correct the position of the image point.

摘要翻译： 一种激光束扫描光学装置，其通过聚焦透镜，多面镜和fθ透镜对从感光鼓上的激光二极管发射的激光束进行成像和扫描。 SOS光电传感器检测扫描的激光束并产生检测信号。 控制激光二极管在产生检测信号之后的指定时间内执行脉冲发射。 脉冲光束入射到采用刀刃法的光束检测器，并检测焦点偏移量。 根据检测到的焦点偏移量，聚焦透镜沿着光轴移动以校正图像点的位置。

公开(公告)号：US08879134B2

公开(公告)日：2014-11-04

申请号：US13442654

申请日：2012-04-09

申请人： Naoki Tajima ,  Yasushi Nagasaka ,  Takahiro Matsuo

发明人： Naoki Tajima ,  Yasushi Nagasaka ,  Takahiro Matsuo

IPC分类号： G02B26/08 ,  G02B26/12 ,  B41J2/47

CPC分类号： G02B26/12 ,  B41J2/473

摘要： A laser scanning optical device includes: alight source having a plurality of emission points; a plate-like light source holder which holds the light source in a center of the light source holder; a base arranged to face the light source holder; and an attitude adjusting part which adjusts an attitude of the light source by adjusting a tilt of the light source holder, and the attitude adjusting part includes an inclined part and an inclination conveying part, and adjusts the tilt of the light source holder with respect to the base by displacing an abutting position of the inclined part corresponding to the inclination conveying part along an inclined surface of the inclined part.

摘要翻译： 激光扫描光学装置包括：具有多个发射点的光源; 将光源保持在光源支架的中心的板状光源支架; 布置成面对光源支架的基座; 以及姿态调节部，其通过调整所述光源保持器的倾斜来调节所述光源的姿势，并且所述姿态调整部具有倾斜部和倾斜传送部，并且调整所述光源保持器相对于 所述基座通过沿着所述倾斜部分的倾斜表面移位与所述倾斜传送部分相对应的所述倾斜部分的邻接位置。

公开(公告)号：US20120275003A1

公开(公告)日：2012-11-01

申请号：US13442654

申请日：2012-04-09

申请人： Naoki Tajima ,  Yasushi Nagasaka ,  Matsuo Takahiro

发明人： Naoki Tajima ,  Yasushi Nagasaka ,  Matsuo Takahiro

IPC分类号： G02B26/10

CPC分类号： G02B26/12 ,  B41J2/473

摘要： A laser scanning optical device includes: alight source having a plurality of emission points; a plate-like light source holder which holds the light source in a center of the light source holder; a base arranged to face the light source holder; and an attitude adjusting part which adjusts an attitude of the light source by adjusting a tilt of the light source holder, and the attitude adjusting part includes an inclined part and an inclination conveying part, and adjusts the tilt of the light source holder with respect to the base by displacing an abutting position of the inclined part corresponding to the inclination conveying part along an inclined surface of the inclined part.

摘要翻译： 激光扫描光学装置包括：具有多个发射点的光源; 将光源保持在光源支架的中心的板状光源支架; 布置成面对光源支架的基座; 以及姿态调节部，其通过调整所述光源保持器的倾斜来调节所述光源的姿势，并且所述姿态调整部具有倾斜部和倾斜传送部，并且调整所述光源保持器相对于 所述基座通过沿着所述倾斜部分的倾斜表面移位与所述倾斜传送部分相对应的所述倾斜部分的邻接位置。

公开(公告)号：US5671079A

公开(公告)日：1997-09-23

申请号：US514268

申请日：1995-08-11

申请人： Yasushi Nagasaka ,  Hiromu Nakamura ,  Satoru Ono

发明人： Yasushi Nagasaka ,  Hiromu Nakamura ,  Satoru Ono

IPC分类号： G02B26/10 ,  G02B13/00 ,  G02B13/18 ,  G02B26/12 ,  G02B27/00 ,  G02B26/08

CPC分类号： G02B26/125 ,  G02B27/0031

摘要： A scanning lens system forms into an image a deflected beam having its object point in the main scanning direction located at a finite distance to scan a scanned surface. The fourth surface is parallelly decentered in the main scanning direction relative to the optical axis passing the center of a main scanning direction scanning width on the scanned surface. The third and fourth surfaces are rotatively decentered relative to the optical axis about an axis parallel to the sub scanning direction.

摘要翻译： 扫描透镜系统在图像中形成偏转光束，该偏转光束的主要扫描方向上的物点位于有限距离处，以扫描扫描的表面。 第四表面相对于通过扫描表面上的主扫描方向扫描宽度的中心的光轴在主扫描方向上平行偏心。 第三和第四表面围绕平行于副扫描方向的轴线相对于光轴旋转偏心。

公开(公告)号：US20120268802A1

公开(公告)日：2012-10-25

申请号：US13434687

申请日：2012-03-29

申请人： Yasushi Nagasaka ,  Naoki Tajima ,  Takahiro Matsuo

发明人： Yasushi Nagasaka ,  Naoki Tajima ,  Takahiro Matsuo

IPC分类号： G02B26/10

CPC分类号： G02B26/124

摘要： The laser scanning optical device comprises: a light source; a collimator lens; a light source holder; a lens holder; a light source unit holder; a first rotation axis; and a second rotation axis. The light source includes a plurality of light emitting points. The collimator lens converts diverging rays irradiated from the light source into parallel rays. The light source holder holds the light source. The lens holder holds the collimator lens. The light source unit holder holds the light source holder and the lens holder. The first rotation axis rotates the collimator lens with respect to an ideal optical axis. The second rotation axis rotates the light source unit holder while constantly maintaining a positional relationship between the light source holder and the lens holder.

摘要翻译： 激光扫描光学装置包括：光源; 准直透镜; 光源支架; 镜头架; 光源单元支架; 第一旋转轴; 和第二旋转轴。 光源包括多个发光点。 准直透镜将从光源照射的发散光线转换为平行光线。 光源支架保持光源。 透镜架固定准直透镜。 光源单元保持器保持光源保持器和透镜保持器。 第一旋转轴相对于理想的光轴旋转准直透镜。 第二旋转轴旋转光源单元保持器，同时保持光源保持器和透镜保持器之间的位置关系。