公开(公告)号：US06856338B2

公开(公告)日：2005-02-15

申请号：US10636686

申请日：2003-08-08

Applicant: Masayoshi Takahashi ,  Tomohiro Nakamori ,  Yoshihiko Tanaka

Inventor： Masayoshi Takahashi ,  Tomohiro Nakamori ,  Yoshihiko Tanaka

IPC: G03G15/00 ,  H04N1/053 ,  H04N1/06 ,  H04N1/113 ,  H04N1/50 ,  B41J2/47

CPC classification number: H04N1/506 ,  H04N1/053 ,  H04N1/06 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04786 ,  H04N2201/04793

Abstract: This invention has as its object to provide an image forming apparatus in which the number of beam detectors is decreased and which is low in cost and high in the accuracy of the registration position of an image of each color as well as high in quality. To this end, The image forming apparatus is provided with a plurality of image bearing members, an optical system having a plurality of light emitting elements suitable for generating light beams for scanning the image bearing members, a single polygon mirror suitable for deflecting the light beams generated from the plurality of light emitting elements onto the image bearing members, and a beam detector corresponding to at least one of the plurality of image bearing members, and for receiving the light beams scanned by the polygon mirror and producing a first synchronizing signal for recording an image on the relevant image bearing member, a storing portion suitable for storing therein information regarding the error of each side of the polygon mirror, and a producing unit suitable for producing a second synchronizing signal for recording an image on the image bearing member not provided with the beam detector, by delaying the first synchronizing signal outputted from the beam detector, on the basis of the value of the storing portion.

Abstract translation: 本发明的目的是提供一种图像形成装置，其中光束检测器的数量减少，并且成本低，并且每种颜色的图像的配准位置的精度以及质量高。 为此，图像形成装置设置有多个图像承载部件，具有适于产生用于扫描图像承载部件的光束的多个发光元件的光学系统，适于偏转光束的单个多面镜 从所述多个发光元件产生到所述图像承载部件上的光束检测器和对应于所述多个图像承载部件中的至少一个的光束检测器，并且用于接收由所述多面镜扫描的光束并产生用于记录的第一同步信号 在相关图像承载部件上的图像，适于存储关于多面镜的每一侧的误差的信息的存储部分和适于产生用于在未设置的图像承载部件上记录图像的第二同步信号的产生单元 通过延迟从光束检测器输出的第一同步信号与光束检测器 r基于存储部分的值。

公开(公告)号：US06831671B2

公开(公告)日：2004-12-14

申请号：US10067868

申请日：2002-02-08

Applicant: Koji Tanimoto ,  Kenichi Komiya ,  Jun Sakakibara ,  Naoaki Ide ,  Toshimitsu Ichiyanagi

Inventor： Koji Tanimoto ,  Kenichi Komiya ,  Jun Sakakibara ,  Naoaki Ide ,  Toshimitsu Ichiyanagi

IPC: B41J247

CPC classification number: B41J2/473 ,  G02B26/127 ,  H04N1/0473 ,  H04N1/1135 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/04712 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04749 ,  H04N2201/04762 ,  H04N2201/04794

Abstract: A light beam position detecting device detects the passage positions of a plurality of light beams for scanning the surface of a photosensitive drum. The light beam position detecting device has a sensor pattern for generating an output which is continuously changed in a wide range with a variation in the passage position of the light beam in a sub-scanning direction perpendicular to a main scanning direction of the light beam. The sensor pattern precisely detects the relative scanning position of the light beam in a wide range. The passage positions of the plurality of light beams for scanning the surface of the photosensitive drum are controlled to a preset position based on the output of the sensor pattern.

Abstract translation: 光束位置检测装置检测用于扫描感光鼓表面的多个光束的通过位置。 光束位置检测装置具有用于产生在与光束的主扫描方向正交的副扫描方向上的光束的通过位置的变化在宽范围内连续变化的输出的传感器图案。 传感器图案在宽范围内精确地检测光束的相对扫描位置。 用于扫描感光鼓表面的多个光束的通过位置基于传感器图案的输出被控制到预设位置。

公开(公告)号：US06798549B2

公开(公告)日：2004-09-28

申请号：US10694831

申请日：2003-10-29

Applicant: Hiroki Yoshida

Inventor： Hiroki Yoshida

IPC: G02B2608

CPC classification number: H04N1/053 ,  G02B26/123 ,  G02B26/125 ,  H04N1/1135 ,  H04N1/1911 ,  H04N2201/0471 ,  H04N2201/04744 ,  H04N2201/04749 ,  H04N2201/04786

Abstract: Provided are a multi-beam scanning optical system capable of implementing high-quality printing in relatively simple structure and at high speed, and an image forming apparatus using it. The multi-beam scanning optical system has an incidence optical unit for guiding a plurality of beams emitted from a light source unit having a plurality of light-emitting regions spaced apart from each other in a main scanning direction, to a deflector; a scanning optical unit for focusing the plurality of beams deflected by the deflector, on a surface to be scanned; and a synchronism-detecting optical unit for converging part of the plurality of beams deflected by the deflector, via a return mirror on a slit surface by a lens section, thereafter guiding the beams to a synchronism detector, and controlling timing of a scan start position on the surface to be scanned, by use of a signal from the synchronism detector. The elements are set so as to satisfy Condition (A) where &dgr;M is a defocus amount in a main scanning section of the beams guided to the synchronism detector and in a view from the slit surface and &dgr;X is a defocus amount at each image height on the surface to be scanned.

公开(公告)号：US06788330B2

公开(公告)日：2004-09-07

申请号：US10093753

申请日：2002-03-08

Applicant: Kouichi Takaki ,  Shinji Morita

Inventor： Kouichi Takaki ,  Shinji Morita

IPC: B41J2435

CPC classification number: H04N1/053 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02443 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04768 ,  H04N2201/04774 ,  H04N2201/04798

Abstract: The invention concerns a clock-generating circuit, which generates dot clock pulses for driving a light-emitting element employed in an optical-writing section of an image-forming apparatus and has a function of canceling f&thgr; property errors caused by a f&thgr; lens employed in the image-forming apparatus. The clock-generating circuit includes a digital-delay dot clock adjusting section to adjust timings of rising-edges or falling-edges of the dot clock pulses generated by changing a selection for a plurality of delayed-clock pulses, which are generated by delaying clock-pulses, outputted from a reference oscillator, in slightly different delay times; and a controlling section to control a selecting operation for the plurality of delayed clock pulses, performed in the digital-delay dot clock adjusting section, so as to compensate for f&thgr; property errors caused by the f&thgr; lens employed in the optical-writing section.

Abstract translation: 本发明涉及一种时钟发生电路，其产生用于驱动图像形成装置的光学写入部分中使用的发光元件的点时钟脉冲，并且具有消除由在 图像形成装置。 时钟发生电路包括数字延迟点时钟调整部分，用于通过改变多个延迟时钟脉冲的选择来产生的点时钟脉冲的上升沿或下降沿的定时，这些延迟时钟脉冲是通过延迟时钟 从参考振荡器输出的脉冲在稍微不同的延迟时间内; 以及控制部分，用于控制在数字延迟点时钟调整部分中执行的多个延迟时钟脉冲的选择操作，以便补偿由光学写入部分中采用的晶片透镜引起的最佳属性误差。

公开(公告)号：US06768562B1

公开(公告)日：2004-07-27

申请号：US09556478

申请日：2000-04-21

Applicant: Norihisa Takada ,  Takeshi Fujii

Inventor： Norihisa Takada ,  Takeshi Fujii

IPC: H04N104

CPC classification number: H04N1/00567 ,  G02B26/10 ,  G02B26/101 ,  G02B26/105 ,  G02B27/0031 ,  H04N1/047 ,  H04N1/0607 ,  H04N2201/03154 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04755 ,  H04N2201/0476 ,  H04N2201/04789 ,  H04N2201/04793

Abstract: A method for correcting recording positions of light beams scanned by a light beam scanning apparatus, in which at least one of plural light beams is deflected by an optical deflecting device and all the plural light beams are combined and scanned by a common scanning optical system. The beam position correction data for the optical deflecting device for keeping positions of the light beams constant is obtained by detecting the beam positions before the scanning optical system. The recording positions of respective light beams on a recording surface is also detected to obtain an additional correction data for correcting deviations of the recording positions due to uneven optical power distribution of the light beam or astigmatism of the scanning optical system. The additional correction data is added to the beam position correction data to obtain the final correction data, by which the optical deflecting device is controlled.

Abstract translation: 一种用于校正由光束扫描装置扫描的光束的记录位置的方法，其中多个光束中的至少一个被光学偏转装置偏转，并且所有的多个光束被共同的扫描光学系统组合和扫描。 通过检测扫描光学系统之前的光束位置，获得用于保持光束位置恒定的光学偏转装置的光束位置校正数据。 还检测记录表面上的各个光束的记录位置，以获得用于校正由于光束的不均匀光功率分布或扫描光学系统的散光引起的记录位置的偏差的附加校正数据。 附加校正数据被添加到光束位置校正数据，以获得最终校正数据，通过该校正数据控制光学偏转装置。

公开(公告)号：US20040109210A1

公开(公告)日：2004-06-10

申请号：US10695287

申请日：2003-10-29

Applicant: Canon Kabushiki Kaisha

Inventor： Hiroki Yoshida

IPC: G02B026/08

CPC classification number: H04N1/053 ,  G02B26/123 ,  G02B26/125 ,  H04N1/1135 ,  H04N1/1911 ,  H04N2201/0471 ,  H04N2201/04744 ,  H04N2201/04749 ,  H04N2201/04786

Abstract: Provided are a multi-beam scanning optical system capable of implementing high-quality printing in relatively simple structure and at high speed, and an image forming apparatus using it. The multi-beam scanning optical system has an incidence optical unit for guiding a plurality of beams emitted from a light source unit having a plurality of light-emitting regions spaced apart from each other in a main scanning direction, to a deflector; a scanning optical unit for focusing the plurality of beams deflected by the deflector, on a surface to be scanned; and a synchronism-detecting optical unit for converging part of the plurality of beams deflected by the deflector, via a return mirror on a slit surface by a lens section, thereafter guiding the beams to a synchronism detector, and controlling timing of a scan start position on the surface to be scanned, by use of a signal from the synchronism detector. The elements are set so as to satisfy Condition (A) where nullM is a defocus amount in a main scanning section of the beams guided to the synchronism detector and in a view from the slit surface and nullX is a defocus amount at each image height on the surface to be scanned.

公开(公告)号：US20040090656A1

公开(公告)日：2004-05-13

申请号：US10694831

申请日：2003-10-29

Applicant: Canon Kabushiki Kaisha

Inventor： Hiroki Yoshida

IPC: G02B026/08

CPC classification number: H04N1/053 ,  G02B26/123 ,  G02B26/125 ,  H04N1/1135 ,  H04N1/1911 ,  H04N2201/0471 ,  H04N2201/04744 ,  H04N2201/04749 ,  H04N2201/04786

Abstract: Provided are a multi-beam scanning optical system capable of implementing high-quality printing in relatively simple structure and at high speed, and an image forming apparatus using it. The multi-beam scanning optical system has an incidence optical unit for guiding a plurality of beams emitted from a light source unit having a plurality of light-emitting regions spaced apart from each other in a main scanning direction, to a deflector; a scanning optical unit for focusing the plurality of beams deflected by the deflector, on a surface to be scanned; and a synchronism-detecting optical unit for converging part of the plurality of beams deflected by the deflector, via a return mirror on a slit surface by a lens section, thereafter guiding the beams to a synchronism detector, and controlling timing of a scan start position on the surface to be scanned, by use of a signal from the synchronism detector. The elements are set so as to satisfy Condition (A) where nullM is a defocus amount in a main scanning section of the beams guided to the synchronism detector and in a view from the slit surface and nullX is a defocus amount at each image height on the surface to be scanned.

公开(公告)号：US20040090522A1

公开(公告)日：2004-05-13

申请号：US10291923

申请日：2002-11-07

Applicant: Xerox Corporation

Inventor： Russell B. Rauch ,  Michael B. Neary ,  Mohammad H. Rahnavard ,  Michael J. Thomas ,  Thomas M. Baretsky

IPC: B41J002/435 ,  B41J002/47 ,  B41J002/385

CPC classification number: G06K15/1219 ,  H04N1/053 ,  H04N1/1135 ,  H04N2201/04712 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04777 ,  H04N2201/04793

Abstract: A system architecture for scanned non-linearity correction in a printer uses any raster output scanner having scanned non-linearity profile previously stored in memory from a test station installed with any pixel board. The pixel board includes a correction table register wherein the pixel board utilizes the scanned non-linearity profile of the raster output scanner to calculate the correction table register to correct for pixel misregistration.

Abstract translation: 在打印机中扫描的非线性校正的系统架构使用任何光栅输出扫描器，其具有先前存储在存储器中的扫描的非线性分布图，该测试台安装有任何像素板。 像素板包括校正表寄存器，其中像素板利用光栅输出扫描器的扫描的非线性分布来计算校正表寄存器以校正像素重合失调。

公开(公告)号：US06690498B2

公开(公告)日：2004-02-10

申请号：US09771561

申请日：2001-01-30

Applicant: Hyeong-Seog Shim

Inventor： Hyeong-Seog Shim

IPC: G02B2608

CPC classification number: H04N1/047 ,  B41J2/471 ,  G02B26/125 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04713 ,  H04N2201/04744

Abstract: A laser scanning unit disclosed in the present invention is intended to form an image on a photo-sensitive drum by generating laser beams in a facsimile unit, a copying machine and a printer using laser beams. The laser scanning unit includes a collimated lens reforming the laser beams emitted from a laser diode into parallel beams, a polygon mirror scanning by deflecting the above laser beams in constant velocity, a f-theta lens for adjusting a focus on a scanning plane by polarizing the laser beams to a main scanning direction and correcting an aberration, a reflecting surface attached with a reflecting film reflecting said laser beams into a horizontal direction, an optical sensor receiving the laser beams reflected from said reflecting film and a base plate for supporting said optical sensor and reflecting surface. According to the present invention, it is not needed an additional component such as the conventional plate spring and reflecting mirror, by using the reflecting film attached to the reflecting surface projected on a base plate instead of a horizontal synchronous mirror, in order to reflect the laser beams with the optical sensor. Accordingly, the present invention can reduce the fabrication cost of a product.

公开(公告)号：US06677974B2

公开(公告)日：2004-01-13

申请号：US09813287

申请日：2001-03-21

Applicant: Jun Sakakibara ,  Koji Tanimoto ,  Kenichi Komiya ,  Koji Kawai

Inventor： Jun Sakakibara ,  Koji Tanimoto ,  Kenichi Komiya ,  Koji Kawai

IPC: B41J2435

CPC classification number: H04N1/053 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0471 ,  H04N2201/04713 ,  H04N2201/04734 ,  H04N2201/04744

Abstract: A synchronization signal detector receives a laser beam each time it is scanned in a main scanning direction, and detects a synchronization signal from the received laser beam. An external circuit or the like sets a binary value-determining level for this detector. The binary value-determining level is so determined as not to generate a signal arising from stray light. By this determination, a synchronization error, which is due to stray light, is prevented without adding manufacturing steps to prevent the stray light or without incurring an increase in the cost needed for structural components.

Abstract translation: 同步信号检测器每次在主扫描方向上扫描时接收激光束，并从接收的激光束检测同步信号。 外部电路等为该检测器设定二进制值确定电平。 二进制值确定级别被确定为不产生由杂散光产生的信号。 通过这种判断，防止杂散光引起的同步误差，而不添加制造步骤来防止杂散光，或者不会导致结构部件所需的成本增加。