公开(公告)号：EP1293842B9

公开(公告)日：2007-10-03

申请号：EP02016202.0

申请日：2002-07-18

申请人： Ricoh Company, Ltd.

发明人： Maeda, Katsuhiko, Ricoh Company, Ltd.

IPC分类号： G03G15/01 ,  G03G15/043 ,  H04N1/053

CPC分类号： H04N1/506 ,  G06K15/1219 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04784 ,  H04N2201/04786 ,  H04N2201/04794

摘要： An image forming apparatus includes at least one image forming mechanism configured to form an image based on image data. Each image forming mechanism includes an optical system, a sensor, an electronic circuit, and a controller. The optical system scans a photosensitive member with a light beam based on image data. The sensor detects the light beam and the electronic circuit stores a correction data table containing light amount data of the light source and corresponding start position shift amount data. The controller controls a light amount of the light source and adjusts a start position of image recording on the photosensitive member in accordance with a sync detect signal. The controller includes a write start position correction unit that adjust the start position of the image recording based on a start position shift amount data when the light amount varies.

公开(公告)号：EP0871140B1

公开(公告)日：2007-06-13

申请号：EP98302831.7

申请日：1998-04-09

申请人： LEXMARK INTERNATIONAL, INC.

发明人： Overall, Gary Scott ,  Wade, Thomas Campbell

IPC分类号： G06K15/12

CPC分类号： H04N1/047 ,  G06K15/1219 ,  H04N2201/02439 ,  H04N2201/04729 ,  H04N2201/04734 ,  H04N2201/04748 ,  H04N2201/04786 ,  H04N2201/04791 ,  H04N2201/04794

摘要： A method of achieving line-to-line synchronization having a high degree of synchronization accuracy. Synchronization is performed by a specific high-speed block of logic which signals the beginning of scans to a PELCLK-based logic at pel boundaries, and provides subpel shifting as it passes data between the pel generation logic and a laser control signal. The synchronization error is made as small as propagation delays through a single multiplexer element. Such delays can be controlled to values less than 1/2 ns. The need to stop and restart the clocks is eliminated. All complex pel generation logic is clocked with the relatively low frequency PELCLK without regard to the synchronization task.

公开(公告)号：EP1011003A3

公开(公告)日：2003-08-13

申请号：EP99125045.7

申请日：1999-12-15

申请人： CANON KABUSHIKI KAISHA

发明人： Ishibe, Yoshihiro, c/o Canon K. K.

IPC分类号： G02B26/12

CPC分类号： G02B26/127 ,  H04N1/047 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04744 ,  H04N2201/04786

摘要： In a light-scanning optical system, a luminous flux emitted from the light source is trimmed and imaged as a linear luminous flux extending in the main scanning direction by the first optical system onto the deflection surface of the deflector. The deflected luminous flux is then imaged on the plane to be scanned by the second optical system that establishes a substantially conjugate relationship between the deflection surface and the plane to be scanned. Part of the deflected luminous flux is reflected by a bending mirror arranged on the light path between the second optical system and the plane to be scanned, and detected by the photodetector that generates a write-start position synchronizing signal for controlling the timing of spotting the scanning start point on the plane to be scanned. The bending mirror thus operates as the luminous flux delimiting member for the incident luminous flux entering the photodetector. The light source may have a plurality of light emitting sections and in that case, the quantity of light detected by the photodetector is equalized for all the plurality of luminous fluxes emitted from the photodetector.

公开(公告)号：EP1286198A2

公开(公告)日：2003-02-26

申请号：EP02255342.4

申请日：2002-07-31

申请人： CANON KABUSHIKI KAISHA

发明人： Mori, Seiichiro

IPC分类号： G02B26/12 ,  H04N1/113

CPC分类号： G02B26/127 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/04713 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04786 ,  H04N2201/04794

摘要： In the scanning optical apparatus, a light source including one or more of the plurality of light emitting points of the light source device, and a synchronism detecting device constituting the synchronism detecting device are provided on the same substrate, an optical element constituting the synchronism detecting device is provided on a light incidence side of the synchronism detecting device, and the scanning optical apparatus has a constitution in which the optical element is rotated in synchronism with the substrate when the substrate is rotated.

摘要翻译： 在扫描光学装置中，在同一基板上设置包括光源装置的多个发光点中的一个以上的光源和构成同步检测装置的同步检测装置，构成同步检测用的光学元件 装置设置在同步检测装置的光入射侧，并且扫描光学装置具有当基板旋转时光学元件与基板同步旋转的构造。

公开(公告)号：EP1009157A3

公开(公告)日：2001-05-02

申请号：EP99309779.9

申请日：1999-12-06

申请人： Xerox Corporation

发明人： Nowak, William J. ,  Appel, James J. ,  Bock, Edward C.

IPC分类号： H04N1/047 ,  H04N1/50

CPC分类号： H04N1/1135 ,  H04N1/047 ,  H04N1/12 ,  H04N1/506 ,  H04N2201/02439 ,  H04N2201/03154 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04739 ,  H04N2201/04744 ,  H04N2201/0476 ,  H04N2201/04763 ,  H04N2201/04786 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

摘要： Electrophotographic printers have raster output scanners (27) that correct for polygon facet (126) phasing errors and photoreceptor (10) position errors by aerial scan line adjustments. A photoreceptor position sensor senses the position of the photoreceptor (10) and a facet position sensor (137) senses the position of the polygon facets. A scan line position controller (119) produces a position signal that depends upon the photoreceptor position sensor and the facet position sensor (137). A piezoelectric-actuated lens mover assembly (118) receives the position signal and moves a pre-polygon lens (116) to adjust the scan line plane to correct for any misregistration. The piezoelectric-actuated lens mover assembly (118) includes a large displacement piezoelectric element and a flexible arm assembly (210) that holds the pre-polygon lens (116).

公开(公告)号：EP1085743A1

公开(公告)日：2001-03-21

申请号：EP00119832.4

申请日：2000-09-12

申请人： CANON KABUSHIKI KAISHA

发明人： Yoshida, Hiroki

IPC分类号： H04N1/053

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

摘要： 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 δM 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 δX is a defocus amount at each image height on the surface to be scanned.

摘要翻译： 提供能够以相对简单的结构和以高速实现高品质的打印的多光束扫描光学系统，并利用它的图像形成装置。 多光束扫描光学系统具有到入射光学单元，用于引导从具有在主扫描方向上彼此间隔开，以偏转发光区域的多个A光源单元发射的光束的多元性; 的扫描光学单元，用于聚焦由所述偏转器偏转光束的多个对被扫描的表面上; 和扫描开始位置的同步检测光学单元，用于通过一透镜部上的狭缝表面会聚由偏转器偏转光束的多个部分，经由返回镜，此后引导光束到一个同步检测器，以及控制定时 的表面上进行扫描，通过利用从同步检测器的信号的。 这些元件在每个图像设定为满足条件（A）其中，δ，M是在引导到同步检测器和在从狭缝表面和delta X的图的光束的主扫描截面的散焦量的散焦量 表面上的高度进行扫描。

公开(公告)号：EP0871140A3

公开(公告)日：2000-11-22

申请号：EP98302831.7

申请日：1998-04-09

申请人： Lexmark International, Inc.

发明人： Overall, Gary Scott ,  Wade, Thomas Campbell

IPC分类号： G06K15/12

CPC分类号： H04N1/047 ,  G06K15/1219 ,  H04N2201/02439 ,  H04N2201/04729 ,  H04N2201/04734 ,  H04N2201/04748 ,  H04N2201/04786 ,  H04N2201/04791 ,  H04N2201/04794

摘要： A method of achieving line-to-line synchronization having a high degree of synchronization accuracy. Synchronization is performed by a specific high-speed block of logic which signals the beginning of scans to a PELCLK-based logic at pel boundaries, and provides subpel shifting as it passes data between the pel generation logic and a laser control signal. The synchronization error is made as small as propagation delays through a single multiplexer element. Such delays can be controlled to values less than 1/2 ns. The need to stop and restart the clocks is eliminated. All complex pel generation logic is clocked with the relatively low frequency PELCLK without regard to the synchronization task.

公开(公告)号：EP1020069A2

公开(公告)日：2000-07-19

申请号：EP98933415.6

申请日：1998-07-15

申请人： Kinetic Sciences Inc.

发明人： IMMEGA, Guy, Broer ,  VANDERKOOY, Geoffrey, Edward

IPC分类号： H04N1/00

CPC分类号： H04N1/0473 ,  H04N1/12 ,  H04N1/193 ,  H04N2201/02439 ,  H04N2201/04703 ,  H04N2201/04734 ,  H04N2201/04743 ,  H04N2201/04786 ,  H04N2201/04787 ,  H04N2201/04794

摘要： A first linear sensor array produces, at a first time of occurrence, a first image of a segment of an object as the object moves across the sensor at a variable speed. The image and its time of occurrence are accumulated in a buffer. As the object continues to move across the sensor, a successive plurality of the segment images seen by the first sensor are accumulated in the buffer, together with their respective times of occurrence. A second linear sensor array spaced a distance d from the first array produces, at a second time of occurrence, a second image of another segment of the moving object. The second image is compared with the accumulated first images to determine which of the accumulated first images is most similar to the second image. The object's speed S can then be estimated as an appropriately weighted function of d/(tj-tm) [i.e. S PROPORTIONAL d/(tj-tm)], where tj is the time of occurrence of a selected one of the second images and tm is the time of occurrence of the first image most similar to the selected second image. By continually monitoring the object's speed in this fashion, one may select and transfer into an image buffer those image segments which together form the highest quality image of the object, independently of the object's speed of motion past the sensor and without the need for expensive, bulky stepper motors, mechanical motion encoders, or the like.

公开(公告)号：EP0930772A3

公开(公告)日：2000-07-12

申请号：EP99100565.3

申请日：1999-01-13

申请人： KONICA CORPORATION

发明人： Azumai, Mitsuo c/o Konica Corporation ,  Takaki, Kouichi c/o Konica Corporation

IPC分类号： H04N1/047

CPC分类号： H04N1/506 ,  H04N1/047 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04746 ,  H04N2201/04749 ,  H04N2201/04763 ,  H04N2201/04786 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

摘要： In an apparatus for forming multi-color image provided with a rotatable image carrying member and a plurality of image forming means each having a charging device, a scanning exposure device and a developing device; each scanning exposure device includes a beam generator and a polygonal mirror. The apparatus is further provided with a first sensor for detecting the beam passing at a start reference position on a peripheral surface of the rotatable image carrying member and for outputting a start reference signal; a second sensor for detecting the beam passing at an end reference position on the peripheral surface and for outputting a stop reference signal; and a controller to measure a time between the start reference signal and the stop reference signal and to control a frequency of clock pulses to transmit image signals for each scanning exposure device on the basis of the measured time of each scanning exposure device.

摘要翻译： 在用于形成多色图像的设备中，所述设备具有可旋转的图像承载部件和多个图像形成装置，每个图像形成装置具有充电装置，扫描曝光装置和显影装置; 每个扫描曝光装置包括光束发生器和多面镜。 该设备还设置有第一传感器，用于检测在可旋转图像承载部件的外围表面上的起始参考位置处通过的光束并输出起始参考信号; 第二传感器，用于检测在外围表面上的末端参考位置处通过的光束并输出停止参考信号; 以及控制器，用于测量起始参考信号与停止参考信号之间的时间，并且基于每个扫描曝光装置的测量时间来控制时钟脉冲的频率以发送用于每个扫描曝光装置的图像信号。

公开(公告)号：EP1009157A2

公开(公告)日：2000-06-14

申请号：EP99309779.9

申请日：1999-12-06

申请人： Xerox Corporation

发明人： Nowak, William J. ,  Appel, James J. ,  Bock, Edward C.

IPC分类号： H04N1/047 ,  H04N1/50

CPC分类号： H04N1/1135 ,  H04N1/047 ,  H04N1/12 ,  H04N1/506 ,  H04N2201/02439 ,  H04N2201/03154 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04739 ,  H04N2201/04744 ,  H04N2201/0476 ,  H04N2201/04763 ,  H04N2201/04786 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

摘要： Electrophotographic printers have raster output scanners (27) that correct for polygon facet (126) phasing errors and photoreceptor (10) position errors by aerial scan line adjustments. A photoreceptor position sensor senses the position of the photoreceptor (10) and a facet position sensor (137) senses the position of the polygon facets. A scan line position controller (119) produces a position signal that depends upon the photoreceptor position sensor and the facet position sensor (137). A piezoelectric-actuated lens mover assembly (118) receives the position signal and moves a pre-polygon lens (116) to adjust the scan line plane to correct for any misregistration. The piezoelectric-actuated lens mover assembly (118) includes a large displacement piezoelectric element and a flexible arm assembly (210) that holds the pre-polygon lens (116).

摘要翻译： 电子照相打印机具有光栅输出扫描器（27），其通过空中扫描线调整来校正多边形面（126）相位误差和感光体（10）位置误差。 感光器位置传感器感测感光体（10）的位置，小面位置传感器（137）感测多边形面的位置。 扫描线位置控制器（119）产生取决于感光体位置传感器和小面位置传感器（137）的位置信号。 压电致动透镜移动器组件（118）接收位置信号并移动预多边形透镜（116）以调整扫描线平面以校正任何重合失调。 压电致动透镜移动器组件（118）包括大位移压电元件和保持前多面透镜（116）的柔性臂组件（210）。