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1.发明授权Systems and method for measuring or reducing spacing errors in multiple beam ROS systems 有权用于测量或减少多波束ROS系统中的间隔误差的系统和方法公开(公告)号：US06608643B2
公开(公告)日：2003-08-19
申请号：US10046234
申请日：2002-01-16
申请人： Robert M. Lofthus , Patrick Y. Maeda , Daniel W. Costanza , Kristine A. German , Fred F. Hubble, III , Robert P. Loce
发明人： Robert M. Lofthus , Patrick Y. Maeda , Daniel W. Costanza , Kristine A. German , Fred F. Hubble, III , Robert P. Loce
IPC分类号： B41J247
CPC分类号： G02B26/123 , G02B26/127
摘要： An apparatus for correcting beam-to-beam spacing error on an image plane of a photoreceptor includes a controller which generates beam-to-beam spacing error corrections signals, a plurality of optical elements, each of which is adjustable and responsive to beam-to-beam spacing error correction signal and a gray level measurement device. The controller performs the beam-to-beam spacing error correction analysis, determining whether or not a correction is necessary, and if so, which optical element to adjust and the magnitude of adjustment. Enhanced toner area coverage sensors are used to detect the gray level of a toned area of raster scan line patterns at various locations across the photoreceptor image plane. By repeatedly evaluating the beam-to-beam spacing error during operation, the apparatus of the invention is able to correct beam-to-beam spacing errors that may develop during operation and does not permit residual errors to persist even after an initial correction has been implemented.
摘要翻译： 用于校正感光体的图像平面上的光束到光束间隔误差的装置包括产生光束到光束间隔误差校正信号的控制器，多个光学元件，每个光学元件可调节并且响应于光束到光束 光束间隔误差校正信号和灰度级测量装置。 控制器执行波束对波束间隔误差校正分析，确定是否需要校正，如果是，则调整哪个光学元件和调整幅度。 增强的调色剂区域覆盖传感器用于检测在感光体图像平面上的各个位置处的光栅扫描线图案的色调区域的灰度级。 通过在操作期间重复评估波束对波束间隔误差，本发明的装置能够校正在操作期间可能产生的波束间距误差，并且即使在初始校正已经被保持之后也不允许残留误差保持 实施。
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公开(公告)号：US5519230A
公开(公告)日：1996-05-21
申请号：US296289
申请日：1994-08-25
CPC分类号： G03G15/755 , B65H23/1882 , G03G2215/00156 , G03G2215/0174
摘要： A sensor having a shutter mounted upon a shaft for rotation within a housing in opposition to a light path between an LED and photodetector is described. A potion of the shaft extends outside the housing connected to an elongated arm. A runner secured to the elongated arm, engages a moving photosensitive surface and deviations of the edge position of the photosensitive surface rotate the shutter in relation to the light path between the LED and photodetector for tracking the edge position of the moving photosensitive surface by providing signals representing shutter position.
摘要翻译： 描述了一种传感器，其具有安装在轴上的快门，用于在壳体内与LED和光电检测器之间的光路相对旋转。 轴的药水延伸到连接到细长臂的壳体的外部。 固定到细长臂上的流道接合移动的感光表面，并且感光表面的边缘位置的偏差相对于LED和光电检测器之间的光路旋转快门，用于通过提供信号来跟踪移动光敏表面的边缘位置 表示快门位置。
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公开(公告)号：US5278587A
公开(公告)日：1994-01-11
申请号：US970889
申请日：1992-11-03
IPC分类号： B41J2/44 , B41J2/45 , B41J2/455 , G03G15/00 , G03G15/01 , G03G21/14 , H04N1/047 , H04N1/113 , H04N1/12 , H04N1/50 , G03G21/00 , G01D15/14
CPC分类号： G03G15/0152 , G03G15/011 , G03G15/0163 , H04N1/0473 , H04N1/506 , H04N1/1135 , H04N1/12 , H04N2201/0471 , H04N2201/04786
摘要： The present invention is directed to a precise method of registering plurality of imaging stations, so as to form sequential images on a photoreceptor belt in a single pass. A belt hole is formed in the photoreceptor belt, outside the image area, but within the scan of the imager scan line. The scan line is sequentially swept in a transverse direction across the width of the belt. As the leading edge of the belt hole advances into the sweeping beam, a plurality of beam sweeps will occur while the leading edge is moving through the sweep area. Due to the gaussian illumination of the scanning beam, the exposure at the belt edge gradually increases to a maximum point coinciding with the maximum illumination of the scanning beam. A detector is placed beneath the belt to provide a signal representing the exposure level of each scanning beam which crosses the leading edge of the advancing belt hole. The detectors produce a current output representative of the exposure level. The current output is converted into voltage outputs which are then used in an extrapolation process to determine a midpoint for the illumination profile crossing the scan line and, from this, a reference time at which the midpoint of the beam illumination was reached. This reference time is then used to generate a precisely timed line sync signal which is reproducible through each of the imaging stations to produce registration of the first scan line of each image sequence with a very high degree of accuracy.
摘要翻译： 本发明涉及一种用于记录多个成像站的精确方法，以便在单次通过中在感光带上形成顺序图像。 在感光带中形成带孔，在图像区域外，但在成像器扫描线的扫描内。 扫描线沿着带的宽度在横向方向依次扫过。 当带孔的前缘进入扫掠光束时，在前缘移动通过扫掠区域时将发生多个光束扫描。 由于扫描光束的高斯照明，带边缘处的曝光逐渐增加到与扫描光束的最大照明一致的最大点。 检测器放置在皮带下方，以提供表示穿过前进皮带孔前缘的每个扫描光束的曝光水平的信号。 检测器产生代表曝光水平的电流输出。 电流输出被转换成电压输出，然后将其用于外推过程中以确定与扫描线相交的照明轮廓的中点，并且从此获得到达光束照明中点的参考时间。 然后，该参考时间用于产生精确定时的线同步信号，该信号可通过每个成像站再现，以非常高的准确度产生每个图像序列的第一扫描线的对准。
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公开(公告)号：US06355926B1
公开(公告)日：2002-03-12
申请号：US09374167
申请日：1999-08-13
IPC分类号： H01J4014
CPC分类号： G21K1/08 , H04N1/0473 , H04N1/1135 , H04N1/12 , H04N2201/02439 , H04N2201/0471 , H04N2201/04734 , H04N2201/04744 , H04N2201/04749 , H04N2201/04762 , H04N2201/04763 , H04N2201/04794
摘要： An apparatus for rapidly determining and correcting the position of a scanning light beam. The apparatus includes a linear position sensor that senses the position of the scan line and a circuit that produces a position signal from the sensed scan line position. A closed loop scan line control system further includes a scan line correction mechanism that adjusts the position of the scan line such that the position of the scan line is corrected for each individual polygon facet. Beneficially, the closed loop scan line correction mechanism includes a mover that moves an optical element, such as a mirror or lens, that adjusts the scan line position.
摘要翻译： 一种用于快速确定和校正扫描光束的位置的装置。 该装置包括检测扫描线的位置的线性位置传感器和从感测的扫描线位置产生位置信号的电路。 闭环扫描线控制系统还包括扫描线校正机构，其调整扫描线的位置，使得针对每个单独的多边形面校正扫描线的位置。 有利地，闭环扫描线校正机构包括移动调整扫描线位置的光学元件（例如镜子或透镜）的移动器。
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5.发明授权Systems and methods for device independent color control to achieve accurate color proofing and reproduction 有权用于设备独立颜色控制的系统和方法，以实现准确的彩色打样和再现公开(公告)号：US06757076B1
公开(公告)日：2004-06-29
申请号：US09461042
申请日：1999-12-15
IPC分类号： H04N146
CPC分类号： H04N1/6052
摘要： A device independent color control server and control methods provide color consistency services and improve consistent color document appearance between any number of connected color image forming devices and/or color display monitors on a distributed network.
摘要翻译： 设备独立的颜色控制服务器和控制方法提供了颜色一致性服务，并且改善了分布式网络上任意数量的连接的彩色图像形成设备和/或彩色显示监视器之间的一致的彩色文档外观。
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公开(公告)号：US06462821B1
公开(公告)日：2002-10-08
申请号：US09552946
申请日：2000-04-20
IPC分类号： G01N2147
CPC分类号： G01N21/55 , G03G15/5041 , G03G2215/00042 , G03G2215/00063
摘要： A developability sensing system with an optical sensor for measuring the density of imaging material samples on an imaging surface of a printer, with an illumination source and photosensor system for measuring the amount of reflected illumination from the imaging materials. A first lens system and its first photosensor may receive both specularly and diffusely reflected illumination from certain imaging materials. A separate lenslet system is positioned outside of the first lens system. It may comprise one to four spaced apart generally cylindrical lenslets with a central axis generally perpendicular to the imaging material sample and an end surface facing the imaging material sample defined by a segment of a hyperbolic curved surface to form a rotationally symmetrical lens with a hyperbolic cross-section. There are separate photosensors for these lenslets, which are positioned and optically adapted to only receive diffusely reflected light from the imaging material sample, even though reflected illumination from the imaging material sample has both specularly and diffusely reflected illumination from partially specularly reflective imaging materials.
摘要翻译： 具有用于测量打印机成像表面上的成像材料样品的密度的光学传感器的显影性感测系统，具有用于测量来自成像材料的反射照明量的照明源和光电传感器系统。 第一透镜系统及其第一光传感器可以接收来自某些成像材料的镜面反射和漫反射照明。 单独的小透镜系统位于第一透镜系统的外部。 它可以包括一至四个间隔开的大致圆柱形的小透镜，其中心轴线基本上垂直于成像材料样品，并且面向由双曲面曲面的段限定的成像材料样品的端面以形成具有双曲线交叉的旋转对称透镜 -部分。 这些小透镜有独立的感光器，即使来自成像材料样品的反射照明都具有来自部分镜面反射成像材料的镜面反射和漫反射照明，这些透镜被定位和光学地适于仅接收来自成像材料样品的漫反射光。
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7.发明授权Spectrophotometer for color printer color control with displacement insensitive optics 有权分光光度计用于彩色打印机色彩控制与位移不敏感光学公开(公告)号：US06384918B1
公开(公告)日：2002-05-07
申请号：US09535007
申请日：2000-03-23
申请人： Fred F. Hubble, III , Joel A. Kubby
发明人： Fred F. Hubble, III , Joel A. Kubby
IPC分类号： G01J351
CPC分类号： H04N1/6033 , G01J3/02 , G01J3/0208 , G01J3/46 , G01J3/501 , G01J3/524
摘要： An improved spectrophotometer for non-contact measuring of the colors of colored target areas, especially, test patches on moving printed test sheets in an unrestrained normal output path of a color printer, which test patches may be sequentially angularly illuminated with multiple different colors, with a photosensor providing electrical signals in response, the spectrophotometer having a lens system for transmitting that reflected illumination from the test patch to the photosensor with a lens magnification ratio of approximately one to one. The exemplary spectrophotometer provides noncontact color measurements of moving color target areas variably displaced therefrom within normal paper path baffle spacings, with a displacement insensitivity of at least 6 millimeters about a nominal target to spectrophotometer separation.
摘要翻译： 一种改进的分光光度计用于非接触式测量着色目标区域的颜色，特别是在彩色打印机的无限制正常输出路径中移动的印刷测试片上的测试片，该测试片可以以多种不同颜色顺序地角度地照亮， 光电传感器响应地提供电信号，分光光度计具有透镜系统，用于以大约一对一的透镜倍率将来自测试贴片的反射照明传输到光传感器。 示例性分光光度计提供在正常纸路径挡板间隔内可变地从其移位的移动着色目标区域的非接触颜色测量，其中标称目标与分光光度计分离之间的位移不敏感度至少为6毫米。
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8.发明授权Sensing system for detecting presence of an ink container and level of ink therein 有权用于检测墨水容器的存在的感测系统和其中的墨水量公开(公告)号：US06234603B1
公开(公告)日：2001-05-22
申请号：US09305990
申请日：1999-05-06
申请人： Kenneth W. Altfather , Michael Carlotta , Steven J. Dietl , Donald M. Stevens , Fred F. Hubble, III
发明人： Kenneth W. Altfather , Michael Carlotta , Steven J. Dietl , Donald M. Stevens , Fred F. Hubble, III
IPC分类号： B41J2175
CPC分类号： B41J2/17553 , B41J2/17513 , B41J2/17546 , B41J2/17566 , B41J2002/17569 , B41J2002/17573 , G01F23/2922 , G01F23/2927
摘要： A low ink sensing system is combined with an ink cartridge detection system to enable a more efficient ink jet printer. An ink container which supplies ink to an associated printhead is modified by the incorporation of two light directing elements, in the preferred embodiment, a faceted prism and a roof mirror, into a transparent wall of the container housing. The cartridge, comprising the ink container and associated printhead, is mounted on a scan carriage. Periodically, the carriage is conveyed to a sensing station comprising a pair of light sources and a commonly used photosensor. A first light source is energized and a beam of light is directed to a location where the roof mirror, would be positioned if the cartridge is present. If the cartridge is absent, lack of a reflected return signal is sensed, indicating a cartridge has not been inserted. Print operation is halted until a cartridge is inserted. If a cartridge is properly inserted, the roof mirror returns most of the incident light to the photosensor which generates a signal indicating the presence of the cartridge. A second light source is then energized and directed towards the faceted prism, which is either immersed in ink or exposed to air within the interior of the container. If the latter, light is internally reflected by the prism facets back to the photosensor. If a print operation has been in progress, and the ink level has fallen, the common photosensor detects either a strong or weak redirected light component and initiates a status check and generates appropriate displays of low ink level or out of ink warnings.
摘要翻译： 低墨水感测系统与墨盒检测系统组合以实现更有效的喷墨打印机。 通过将两个光引导元件（在优选实施例中）将多面棱镜和屋顶反射镜结合到容器壳体的透明壁中来修改向相关联的打印头供应墨水的墨水容器。 包括墨水容器和相关联的打印头的墨盒安装在扫描托架上。 定期地，托架被传送到包括一对光源和常用光传感器的感测站。 第一光源被激励，并且光束被引导到如果存在盒时定位的屋顶反射镜的位置。 如果墨盒不存在，则感测不到反射的返回信号，表示墨盒未被插入。 打印操作停止，直到插入墨盒。 如果墨盒正确插入，则屋顶镜将大部分入射光返回到光电传感器，该光电传感器产生指示墨盒存在的信号。 然后将第二光源通电并且指向朝向容器内部的空气中浸入油墨中的小面棱镜。 如果后者，光被棱镜面内部反射回光传感器。 如果正在进行打印操作，并且墨水量下降，则常见的光电传感器会检测到强或弱的重定向光分量，并启动状态检查，并生成低墨水量或墨水警告的适当显示。
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公开(公告)号：US5394223A
公开(公告)日：1995-02-28
申请号：US930642
申请日：1992-08-17
申请人： Steven C. Hart , Fred F. Hubble, III , Thomas J. Hammond , Jeffrey J. Folkins , James P. Martin
发明人： Steven C. Hart , Fred F. Hubble, III , Thomas J. Hammond , Jeffrey J. Folkins , James P. Martin
CPC分类号： G03G15/0152 , G03G15/0163
摘要： An apparatus for positional tracking a moving photoconductive belt and adjusting an imager in an electrophotographic printing machine to correct for alignment errors when forming a composite image. Registration errors are sensed by developing an appropriate set of target marks, detecting the target marks, and controlling the position of the imager.
摘要翻译： 一种用于位置跟踪移动光电导带并调整电子照相印刷机中的成像器的装置，以校正形成复合图像时的对准误差。 通过开发适当的目标标记集，检测目标标记和控制成像器的位置来感测注册错误。
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公开(公告)号：US5339150A
公开(公告)日：1994-08-16
申请号：US35830
申请日：1993-03-23
CPC分类号： G03G15/0152 , B41J2/45 , G03G15/0163 , H04N1/506
摘要： An apparatus and method of adjusting an imager in an electrophotographic printing machine to correct for registration errors when forming a composite image. Registration errors are sensed by forming one or more target lines on the photoreceptor surface, detecting the center of the lines and controlling the operation of the imager in response thereto. In one embodiment, four LED print bars form a composite color image in a single pass. A photosensor is placed beneath the print bars; a narrow target line is formed on the belt surface a few scan lines before the start of an exposure frame. The center of the line is detected by circuitry connected to the sensor output which produces a signal corresponding to detection of the center of the target line. This output signal is generated for each of the three downstream print bars and a signal is applied to each print bar to start the image exposure sequence in registration with first image exposure. In a second embodiment, skew registration adjustments are enabled by forming two line marks at opposite ends of the photoreceptor, detecting the center of each mark and making the adjustments of the position of the downstream print bars based on time differences between detection of the generation of the two signals.
摘要翻译： 一种在电子照相打印机中调整成像器的装置和方法，以在形成合成图像时校正注册误差。 通过在感光体表面上形成一个或多个目标线，检测线的中心并响应于此控制成像器的操作来感测对准误差。 在一个实施例中，四个LED打印条在单次通过中形成复合彩色图像。 光电传感器放置在打印条下方; 在曝光框架开始之前，在带表面上形成几条扫描线的窄目标线。 线路的中心由连接到传感器输出的电路检测，该电路产生对应于目标线的中心的检测的信号。 为三个下游打印条中的每一个生成该输出信号，并且向每个打印条施加信号以开始与第一图像曝光对准的图像曝光序列。 在第二实施例中，通过在感光体的相对端处形成两个线标记，检测每个标记的中心并基于检测到下一个印刷条的位置之间的时间差， 两个信号。
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