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1. 发明专利

JP2007226130A Optical scanner, image forming apparatus, and phase modulation method 审中-公开
标题翻译：光学扫描仪，图像形成装置和相位调制方法
公开(公告)号：JP2007226130A
公开(公告)日：2007-09-06
申请号：JP2006050172
申请日：2006-02-27
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： AMADA MIGAKU , NAKAJIMA TOMOHIRO , ITABASHI AKIHISA , SUZUKI SEIZO
IPC分类号： G02B26/10 , G02B26/12 , G02F1/13 , G02F1/133 , H04N1/113
CPC分类号： G02F1/1313 , B41J2/473 , G02B7/008 , G02B26/123 , G02B26/124 , G02F2201/128 , G02F2203/18
摘要： PROBLEM TO BE SOLVED: To prevent deterioration of a beam spot diameter of an optical beam converged on a surface to be scanned of a photoreceptor, by suppressing generation of wave aberration of the optical beam passed through a liquid crystal element. SOLUTION: When a refractive power is generated inside a liquid crystal layer by applying a driving voltage to the liquid crystal element 20a, the driving voltage to be applied is controlled for example by temperature of the liquid crystal element, thereby controlling to minimize the wave aberration that is generated in an optical beam in accordance with the phase modulation of the liquid crystal layer. As a result, in deflecting by the liquid crystal element 20a an optical beam emitted from a semiconductor laser 11a, the spot diameter of the optical beam can be prevented from deteriorating. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：通过抑制通过液晶元件的光束的波形的产生，防止会聚在感光体的被扫描面上的光束的光点直径的劣化。解决方案：当通过向液晶元件20a施加驱动电压来在液晶层内产生屈光力时，例如通过液晶元件的温度来控制所施加的驱动电压，从而控制最小化根据液晶层的相位调制在光束中产生的波像差。结果，在通过液晶元件20a偏转从半导体激光器11a发射的光束的情况下，可以防止光束的光斑直径变差。版权所有（C）2007，JPO＆INPIT

2. 发明专利

JP2007193349A Optical scanner and image formation apparatus 有权
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2007193349A
公开(公告)日：2007-08-02
申请号：JP2007038238
申请日：2007-02-19
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HAYASHI YOSHIAKI , SUZUKI SEIZO , KAWAMURA ATSUSHI , ATSUMI HIROMICHI , SAKAI KOJI , ITABASHI AKIHISA
IPC分类号： G02B26/10 , B41J2/44 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide an optical scanner that can reduce changes of beam diameter due to a temperature change and a pitch deflection of a vertical scanning beam pitch of multi-beam. SOLUTION: The optical scanner includes: a first optical system 21 having a coupling lens 2 which couples a light flux from a light source 1; a second optical system 22 which is formed of a lens 3 having a positive power in a vertical scanning direction and forms the light flux into a line image extending in the horizontal scanning direction on a deflector 4; and a third optical system 23 which condenses the light flux deflected with the deflector 4 on a surface to be scanned 9a as an optical beam spot and includes a first scanning lens 5 having a positive power in the horizontal scanning direction, and a second scanning lens 6 having a positive power in the vertical scanning direction. Lateral magnification ¾βm¾ in the horizontal scanning direction of the whole optical system is set larger than the lateral magnification ¾βs¾ in the vertical scanning direction. Ribs 20A and 20B satisfies the condition of: "temperature T1 near the first scanning lens 5" > "temperature T2 near the second scanning lens 6". COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够减少由于多光束的垂直扫描光束间距的温度变化和音调偏转引起的光束直径变化的光学扫描器。光学扫描器包括：具有耦合来自光源1的光通量的耦合透镜2的第一光学系统21; 第二光学系统22，其由在垂直扫描方向上具有正功率的透镜3形成，并将光束形成为在偏转器4上沿水平扫描方向延伸的行图像; 以及第三光学系统23，其将偏转器4偏转的光束在待扫描的表面9a上会聚为光束点，并且包括在水平扫描方向上具有正的功率的第一扫描透镜5和第二扫描透镜 6在垂直扫描方向上具有正的功率。在整个光学系统的水平扫描方向上的横向放大倍率¾βm¾被设定为大于垂直扫描方向上的横向放大率¾βs¾。肋20A和20B满足“第一扫描透镜5附近的温度T1”>“靠近第二扫描透镜6的温度T2”的条件。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2005292349A Optical scanning device, image forming apparatus and method for driving liquid crystal element 审中-公开
标题翻译：光学扫描装置，图像形成装置和驱动液晶元件的方法
公开(公告)号：JP2005292349A
公开(公告)日：2005-10-20
申请号：JP2004105468
申请日：2004-03-31
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： AMADA MIGAKU , SUZUKI SEIZO , ITABASHI AKIHISA , SUHARA HIROYUKI , SUZUKI MITSUO
IPC分类号： B41J2/44 , G02B26/10 , G02F1/13 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To stabilize the shape of a beam spot on a scanned surface by suppressing changes in a convergence or divergence state of a projection beam caused by optical path deflection of an incident beam when a liquid crystal element is applied as an optical path deflecting means in an optical scanning device. SOLUTION: The optical scanning device 20 is equipped with liquid crystal elements 43a and 43b capable of modulating the phase of a laser beam, wherein the liquid crystal elements 43a and 43b have striped electrode patterns arrayed in one direction and have a means (liquid crystal element driving IC) 45 of varying the effective value of a driving voltage for each of the striped electrode patterns, and the voltage applied to the striped electrode patterns provided in the liquid crystal elements 43a and 43b are controlled by the liquid crystal driving IC 45 to optionally control the phases of laser beams emitted from the liquid crystal elements 43a and 43b. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过抑制当施加液晶元件时由入射光束的光路偏转引起的投影光束的会聚或发散状态的变化来使待扫描表面上的光斑的形状稳定，作为问题光学扫描装置中的光路偏转装置。解决方案：光学扫描装置20配备有能够调制激光束相位的液晶元件43a和43b，其中液晶元件43a和43b具有沿一个方向排列的条状电极图案，液晶元件驱动IC）45，用于改变每个条形电极图案的驱动电压的有效值，并且施加到设置在液晶元件43a和43b中的条纹电极图案的电压由液晶驱动IC 可选地控制从液晶元件43a和43b发射的激光束的相位。版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2005234414A Optical scanner and image forming apparatus 审中-公开
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2005234414A
公开(公告)日：2005-09-02
申请号：JP2004045722
申请日：2004-02-23
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IMAI SHIGEAKI , ISHIDA MASAAKI , NAKAJIMA TOMOHIRO , SUZUKI SEIZO
IPC分类号： B41J2/44 , G02B26/10 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To conduct highly precise beam spot positional correction while preventing the increase in the memory size.
SOLUTION: A pixel clock controlling circuit 23 makes the transition timing of pixel clocks variable based on the comparison result between phase data 21 that instruct the transition timing and high frequency clocks generated by a high frequency clock generating circuit 20 and beam spot position is corrected by inputting the signals, in which the phases of the pixel clocks are shifted, into a light source 24. The phase data 21 are expressed by function expression and the coefficients of each term of function expression are stored.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了进行高精度的光斑位置校正，同时防止存储器大小的增加。解决方案：像素时钟控制电路23基于指示转换时序的相位数据21与高频时钟发生电路20产生的高频时钟之间的比较结果和光点位置通过将像素时钟的相位偏移的信号输入到光源24来校正。相位数据21由功能表达式表示，并且存储每个功能表达项的系数。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2005037575A Optical scanner and color image forming apparatus 有权
标题翻译：光学扫描仪和彩色图像形成装置
公开(公告)号：JP2005037575A
公开(公告)日：2005-02-10
申请号：JP2003198922
申请日：2003-07-18
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUZUKI MITSUO , SUZUKI SEIZO , ITO SATORU
IPC分类号： B41J2/44 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To obtain an optical scanner and a color image forming apparatus in which the positions of laser beams for writing an images corresponding to respective colors are detected at high accuracy, then, the gaps between a plurality of laser beams are corrected to predetermined positions, and consequently the deviation of positions of beam spots is suppressed.
SOLUTION: In the optical scanner, a plurality of laser beam detectors P1K and P2K for detecting the positions of the laser beams are arranged in a main scanning direction, the laser beam detectors have a plurality of light receiving faces for detecting the laser beams, and at least a side edge of the light receiving faces which are adjacent to each other is arranged with an angle. The laser beam detectors P1K and P2K have a subscanning position detection means of laser beams, a subscanning gap detection means, and the optical scanner has a scanning position correction means for correcting a scanning position based on the detection result of the subscanning gap detection means and a subscanning gap correction means for correcting a subscanning gap based on the detection result of the subscanning gap detection means.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题为了获得光学扫描仪和彩色图像形成装置，其中以高精度检测用于写入对应于各种颜色的图像的激光束的位置，则多个激光束之间的间隙被校正到预定位置，因此抑制了光斑的位置偏移。解决方案：在光学扫描器中，用于检测激光束位置的多个激光束检测器P1K和P2K沿主扫描方向布置，激光束检测器具有多个用于检测激光的光接收面并且彼此相邻的光接收面的至少一个侧边缘以一定角度布置。激光束检测器P1K和P2K具有激光束的副扫描位置检测装置，副扫描间隙检测装置，并且光扫描器具有扫描位置校正装置，用于基于副扫描间隙检测装置的检测结果校正扫描位置;以及副扫描间隙校正装置，用于基于副扫描间隙检测装置的检测结果来校正副扫描间隙。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2005017423A Color image forming apparatus 审中-公开
标题翻译：彩色图像形成装置
公开(公告)号：JP2005017423A
公开(公告)日：2005-01-20
申请号：JP2003179037
申请日：2003-06-24
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUZUKI SEIZO , NAKAJIMA TOMOHIRO
IPC分类号： G03G15/01
摘要： PROBLEM TO BE SOLVED: To obtain a color image forming apparatus that reduces color deviation caused by a circumferential nonuniform speed of a transfer body, effectively corrects the color deviation relative to one another even in the case of the replacement of the transfer body, and outputs a satisfactory color image in which the color deviation is little.
SOLUTION: The color image forming apparatus includes: a light source that emits light beams; a deflecting means that deflects the light beams emitted from the light source; a plurality of photoreceptors on which latent images are formed by scanning the photoreceptors with respective deflected light beams, thereby exposing the photoreceptors; a development means that supplies toners of different colors to the corresponding photoreceptors, thereby developing electrostatic latent images corresponding to the colors as toner images; the transfer body 20 on which the toner images on the respective photoreceptors are transferred in order and superimposed one on another. Correction data 24 for correcting a circumferential speed difference measured in advance is recorded on the transfer body 20 or a case containing the transfer body 20.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题为了获得一种减少由转印体的周向不均匀速度引起的颜色偏差的彩色图像形成装置，即使在更换转印体的情况下也能有效地校正颜色偏差，并输出颜色偏差小的令人满意的彩色图像。解决方案：彩色图像形成装置包括：发射光束的光源; 偏转装置，其使从光源发射的光束偏转; 通过用相应的偏转光束扫描感光体，从而使感光体曝光，在其上形成潜像的多个感光体; 向相应的感光体提供不同颜色的调色剂的显影装置，从而将对应于颜色的静电潜像显影为调色剂图像; 其上各个感光体上的调色剂图像依次传送到其上的转印体20。用于校正预先测量的圆周速度差的校正数据24被记录在转印体20或包含转印体20的壳体上。（C）2005，JPO＆NCIPI

7. 发明专利

JP2004295132A Optical scanner 审中-公开
公开(公告)号：JP2004295132A
公开(公告)日：2004-10-21
申请号：JP2004111478
申请日：2004-04-05
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HAYASHI YOSHIAKI , SUZUKI SEIZO , MASUDA KOJI , NASUKAWA TOSHIMICHI
IPC分类号： B41J2/44 , G02B13/00 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To realize an optical scanner which dispenses with an aperture as an independent component.
SOLUTION: In the optical scanner, a first image forming optical system focuses a light beam emitted from a coupled light source as a line image which is extended in a main scanning corresponding direction, a light deflector deflects the line beam at a constant angular velocity, and a second image forming optical system focuses the deflected light beam as a light spot on a plane to be scanned, thus the plane to be scanned is scanned with the light beam. The first image forming optical system 149 has an aperture function with which the light beam cross section of a coupled light beam is regulated, at least one plane of the first image forming optical system 149 has a part 141 through which a main light beam part which forms the light spot including the main light beam of the coupled light beam passes, and a peripheral light beam blocking part 150 which blocks the peripheral light beam part of the outer side of the main light beam part at the periphery of the part 141. The peripheral light beam blocking part 150 is formed by a printing or a coating and the part 141 which passes the main light beam part is recessed with respect to the peripheral light beam blocking part 150.art 141 which passes the main light flux part is recessed with respect to the peripheral light flux blocking part 150.
COPYRIGHT: (C)2005,JPO&NCIPI

8. 发明专利

JP2004157480A Optical scanning device and image forming device 审中-公开
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：JP2004157480A
公开(公告)日：2004-06-03
申请号：JP2002325535
申请日：2002-11-08
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： MIYATAKE NAOKI , NAKAJIMA TOMOHIRO , SUZUKI MITSUO , SUZUKI SEIZO
IPC分类号： B41J2/44 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To reduce the cost of a device of optical scanning and a device of forming an image in which a plurality of planes to be scanned are scanned with a group of optical beams with a common optical deflection means by adopting a resin lens which is closest to the optical deflection means in a plurality of scanning image forming optical systems, and to effectively reduce the influence of the heat generated in the optical deflection means.
SOLUTION: The device of optical scanning has resin lenses 71A and 71B which are closest to the optical deflection means 6 in respective scanning image forming optical systems, a part 100C including the optical deflection means 6 and parts 100A and 100B including a scanning image forming optical system are spatially shielded from each other with partition walls 11A and 11B in the internal space of an optical box 100, and respective light beams are made incident to and reflected from the space 100C via a parallel flat glass plates 5 which are a part of the partition walls.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了降低光学扫描装置的成本和形成图像的装置，其中用一组共同的光学偏转装置的一组光束扫描要扫描的多个平面，通过采用在多个扫描图像形成光学系统中最靠近光学偏转装置的树脂透镜，并且有效地减少在光学偏转装置中产生的热的影响。解决方案：光扫描装置具有在各扫描图像形成光学系统中最靠近光偏转装置6的树脂透镜71A和71B，包括光偏转装置6的部分100C和包括扫描图像的部分100A和100B 图像形成光学系统在光学盒100的内部空间中被分隔壁11A和11B彼此空间屏蔽，并且各个光束通过平行平板玻璃板5入射并从空间100C反射，平板玻璃板5 部分隔墙。版权所有（C）2004，JPO

9. 发明专利

JP2003337296A Optical scanner and color image forming apparatus 审中-公开
标题翻译：光学扫描仪和彩色图像形成装置
公开(公告)号：JP2003337296A
公开(公告)日：2003-11-28
申请号：JP2002145606
申请日：2002-05-21
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUZUKI MITSUO , HAYASHI YOSHIAKI , SUZUKI SEIZO
IPC分类号： B41J2/44 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To make the accuracy of the positional deviation of a beam spot higher and also to realize the high image quality and the quiet sound of a color image forming apparatus by reducing the temperature rise of a scanning lens used in an optical scanner and the temperature deviation of every optical scanner of the color image forming apparatus and reducing the vibration of the optical scanner.
SOLUTION: A polygon mirror at an upper stage is shown as 20U, a polygon mirror at a lower stage is shown as 20D, and two fθ lenses are shown as 31M and 32M. The material of the lenses 31M and 32M is inexpensive plastic material easily forming aspherical shape. It is better that a plate 33M is made of metal having high heat conductivity, and its thermal expansion coefficient is near to that of the lenses 31M and 32M. By setting such material and constitution, there is no part where the temperature of the lenses 31M and 32M locally gets high due to temperature rise in an optical housing 31 caused by heat generation in a polygon mirror and a fixing unit and temperature distribution (especially, in a main scanning direction) is flattened and the positional deviation of the scanning beam spot is restrained.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了使光束点的位置偏差的精度更高，并且还通过降低使用的扫描透镜的温度升高来实现彩色图像形成装置的高图像质量和安静的声音光学扫描器和彩色图像形成装置的每个光学扫描仪的温度偏差，并减少光学扫描仪的振动。
解决方案：上级的多面镜显示为20U，下级的多面镜显示为20D，两个fθ透镜显示为31M和32M。透镜31M和32M的材料是容易形成非球面形状的便宜的塑料材料。板33M由具有高导热性的金属制成，其热膨胀系数接近透镜31M和32M的热膨胀系数更好。通过设定这种材料和结构，不会由于多面镜中的发热引起的光学壳体31的温度升高以及定影单元和温度分布（特别是，在主扫描方向上）被平坦化，并且抑制了扫描束斑的位置偏差。版权所有（C）2004，JPO

10. 发明专利

JP2003322811A Optical scanner and image forming apparatus 有权
标题翻译：光学扫描仪和图像形成装置
公开(公告)号：JP2003322811A
公开(公告)日：2003-11-14
申请号：JP2002295220
申请日：2002-10-08
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUZUKI SEIZO , HAYASHI YOSHIAKI , SHIMADA KAZUYUKI
IPC分类号： B41J2/44 , G02B13/00 , G02B26/10 , G02B26/12 , G03G15/01 , G03G15/04 , H04N1/036 , H04N1/047 , H04N1/113
CPC分类号： B41J2/473 , G02B26/123 , H04N1/047 , H04N1/0473 , H04N1/113 , H04N1/1135 , H04N1/12 , H04N1/192 , H04N1/40006 , H04N1/4015 , H04N2201/02441 , H04N2201/04722 , H04N2201/04732 , H04N2201/04787 , H04N2201/04796
摘要： PROBLEM TO BE SOLVED: To realize excellent optical scanning by effectively correcting a scanning line curving in an optical scanner. SOLUTION: In the optical scanner to optically scan a surface to be scanned with a light spot, an effective scanning area is divided into a plurality of areas: Di (i=1, 2,...) in accordance with scanning line curving characteristic, and image data suitable for the optical scanning of the respective areas: Di is selected out of the image data on a plurality of scanning lines for every optical scanning, whereby a division writing system for writing the image data on each scanning line after correcting the scanning line curving regardless of the scanning line curving is performed. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：通过有效地校正光学扫描仪中的扫描线弯曲来实现优异的光学扫描。解决方案：在光学扫描仪中，用光点对要扫描的表面进行光学扫描，有效扫描区域被划分为多个区域：Di（i = 1,2，...），根据扫描线弯曲特性和适合于各个区域的光学扫描的图像数据：对于每次光学扫描，在多条扫描线上从图像数据中选择Di，由此分割写入系统用于在每条扫描线上写入图像数据在校正扫描线弯曲之后，不管扫描线弯曲是否被执行。版权所有（C）2004，JPO

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