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    BEAM POSITION SENSOR FOR A LIGHT BEAM SCANNER
    14.
    发明申请
    BEAM POSITION SENSOR FOR A LIGHT BEAM SCANNER 审中-公开
    光束扫描仪的光束位置传感器

    公开(公告)号：WO1991014192A1

    公开(公告)日：1991-09-19

    申请号：PCT/US1991001313

    申请日：1991-02-27

    Applicant: EASTMAN KODAK COMPANY

    Inventor： EASTMAN KODAK COMPANY ,  BALDWIN, Roger, Ernest

    IPC: G02B26/10

    CPC classification number: G02B26/123 ,  B41J2/473 ,  G06K15/129 ,  H04N1/053 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/03158 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04725 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04737 ,  H04N2201/04739 ,  H04N2201/04741 ,  H04N2201/04744 ,  H04N2201/04767 ,  H04N2201/04786 ,  H04N2201/04789 ,  H04N2201/04793 ,  H04N2201/04794

    Abstract: A beam position sensor for a beam scanner is disclosed for use in a laser printer. The printer comprises three diode lasers each of which emits at a different wavelength. The beams from the three lasers are combined by the use of dichroic plates to form one combined beam. The combined beam is scanned onto a receiving medium by a polygon. The beam position sensor of the present invention is adapted to sense the position of the polygon in order to provide a synchronizing signal which will insure that each raster line in the printer is started at the proper position. The beam position sensor includes a diode laser and optics for projecting a beam from the laser onto the polygon. The beam is reflected back from the polygon into a photodetector which effects the start of a new raster line at the appropriate time. In order to minimize the number of optical elements in the beam position sensor and to simplify the device, the diode laser and the photodetector are located along the same optical axis.

    Abstract translation: 描述了用于在激光打印机中使用的光束读取设备的光束位置检测器。 该打印机包括三个二极管激光器，每个激光器以不同的波长发射。 这三个激光器的光束通过二向色板（18,20）组合成一个组合光束。 组合光束由多边形（40）在接收介质（46）上扫描。 本发明的光束位置检测器（102）适于检测多边形（40）的位置以提供定时信号，该定时信号将确保打印机框架的每条线在适当位置被启动。 。 光束位置检测器（102）包括二极管激光器（121）和用于将激光器（120）的光束投射到多边形（40）上的光学元件（122,126）。 光束的反射通过光检测器（132）中的多边形（40）返回，该检测器在适当的时间开始新的光栅线。 为了减少光束位置检测器（102）中的光学元件的数量并简化器件，二极管激光器（121）和光电检测器（132）沿着相同的光轴（ A“）。

    PRECISION PAPER TRANSPORT SYSTEM
    17.
    发明申请
    PRECISION PAPER TRANSPORT SYSTEM 审中-公开
    精密纸运输系统

    公开(公告)号：WO1988000530A1

    公开(公告)日：1988-01-28

    申请号：PCT/US1987001675

    申请日：1987-07-21

    Applicant: VFN

    Inventor： VFN ,  DeLACY, Thomas, Joseph

    IPC: B41J11/42

    CPC classification number: H04N1/128 ,  B41J11/46 ,  G05B19/232 ,  H04N1/047 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/02416 ,  H04N2201/02439 ,  H04N2201/03108 ,  H04N2201/0471 ,  H04N2201/04718 ,  H04N2201/04724 ,  H04N2201/04725 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04734 ,  H04N2201/04755 ,  H04N2201/04756 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04794

    Abstract: A closed loop direct position feedback control method and recording apparatus for producing on a recording medium a plurality of successive print lines or otherwise component images. An appendant demarcation device provides for the proper abutting and spacing of each independent print character. The apparatus includes a mechanism (18) for transporting the medium along a path orthogonal to the print head (12), which produces single lines or swaths (3) of print in conjunction with the indexed advance of the medium relative to the print head (12). The transport mechanism (18) is operative to advance a first print line or swath through the recording station (12) to form a first print line, to identify and store the position coordinates of each print line or swath (3), and to advance the recording medium for successive line or swath printing (3). The direct position feedback control apparatus also includes a demarcation sensing and printing device (20), (33) for relative positioning, whereby the distance between the location of any sensed or printed demarcation reference and the next successive print line is controlled such that each print line will neglect the positioning error in any previous print line or swath.

    Abstract translation: 一种闭环直接位置反馈控制方法和记录装置，用于在记录介质上产生多个连续的打印行或其它分量图像。 附属分界装置提供每个独立打印字符的适当邻接和间隔。 该装置包括用于沿着与打印头（12）正交的路径传送介质的机构（18），该机构与打印头相对于打印头的索引进给结合而产生打印的单条或条带（3） 12）。 传送机构（18）可操作以使第一打印线或条带通过记录站（12）以形成第一打印行，以识别和存储每个打印行或条（3）的位置坐标，并且前进 用于连续线或条纹打印的记录介质（3）。 直接位置反馈控制装置还包括用于相对定位的分界检测和打印装置（20），（33），由此控制任何感测或印刷的分界基准的位置与下一个连续打印行之间的距离，使得每个打印 线将忽略任何以前的打印行或条纹中的定位错误。

    SCANNER BELT LOAD AND STRETCH COMPENSATION CONTROL SYSTEM
    19.
    发明申请
    SCANNER BELT LOAD AND STRETCH COMPENSATION CONTROL SYSTEM 审中-公开
    扫描带加载和拉伸补偿控制系统

    公开(公告)号：WO2013059920A1

    公开(公告)日：2013-05-02

    申请号：PCT/CA2012/000989

    申请日：2012-10-23

    Applicant: HONEYWELL ASCA INC.

    Inventor： BESELT, Ron

    IPC: G01D11/00 ,  G01G17/02 ,  G01N21/86 ,  G01N33/34

    CPC classification number: H04N1/053 ,  G01B2210/44 ,  H04N1/128 ,  H04N1/203 ,  H04N2201/0471 ,  H04N2201/04734 ,  H04N2201/04753 ,  H04N2201/04755 ,  H04N2201/04794

    Abstract: Upper to lower assembly analog position sensors in a dual scanning system measure alignment offsets. A controller uses error signals from the position sensors to calculate actuator error profiles that are used in the next scan in the same direction, with different error profiles being used for forward and reverse scans. Since the alignment error profiles are repeatable for a given set of scanner conditions, the actuator controller anticipates what the error signal will be before each scanning assembly reaches a given position. An optimized error correction can be calculated based on the error profiles and actuator bandwidth without concerns regarding feedback loop speed, overshoot, and unstable control oscillations. An actuation system driven from error profiles can correct for alignment offsets by actively changing belt tensions at the offsetting drive pulleys and/or changing the position of sensor assemblies relative to the drive belt systems.

    Abstract translation: 双重扫描系统中的上到下组装模拟位置传感器测量对准偏移。 控制器使用位置传感器的误差信号来计算在相同方向下次扫描中使用的执行器误差轮廓，其中不同的误差轮廓用于正向和反向扫描。 由于对于给定的一组扫描仪条件，对准误差轮廓是可重复的，所以致动器控制器预测在每个扫描组件到达给定位置之前将产生什么误差信号。 可以基于误差轮廓和执行器带宽计算优化的误差校正，而不用考虑反馈回路速度，过冲和不稳定的控制振荡。 从误差轮廓驱动的致动系统可以通过主动地改变偏移驱动滑轮处的带张力和/或改变传感器组件相对于传动带系统的位置来校正对准偏移。

    PIXEL CLOCK GENERATOR AND IMAGE FORMING APPARATUS
    20.
    发明申请
    PIXEL CLOCK GENERATOR AND IMAGE FORMING APPARATUS 审中-公开
    像素时钟发生器和图像形成装置

    公开(公告)号：WO2010032862A1

    公开(公告)日：2010-03-25

    申请号：PCT/JP2009/066572

    申请日：2009-09-15

    Applicant: RICOH COMPANY, LIMITED ,  MASUI, Naruhiro

    Inventor： MASUI, Naruhiro

    IPC: B41J2/44 ,  G02B26/12 ,  H04N1/113

    CPC classification number: H04N1/053 ,  G02B26/127 ,  G03G15/043 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0082 ,  H04N2201/02439 ,  H04N2201/0471 ,  H04N2201/04732 ,  H04N2201/04744 ,  H04N2201/04772 ,  H04N2201/04784 ,  H04N2201/04786 ,  H04N2201/04794

    Abstract: A pixel clock generator includes a frequency divider 4 that generates a pixel clock PCLK based on a high frequency clock VCLK, a comparator 5 that calculates an error Lerr in the time obtained by integrating a cycle of the pixel clock PCLK for a target number RefN from a time when synchronization signals SPSYNC and EPSYNC are detected, a filter 6, and a frequency calculating unit 7 that sets a frequency dividing value M of the frequency divider 4. The filter 6 and the frequency calculating unit 7 calculate an average of a frequency of the pixel clock PCLK based on the error Lerr, determine a reference error value from the error Lerr in N-cycles, calculate offset values of the frequencies of N pieces of pixel clocks PCLK based on a difference between the reference error value and the error Lerr, and calculate the frequency dividing value M based on a result obtained by adding the circularly selected offset values and the average of the frequency of the pixel clock PCLK.

    Abstract translation: 像素时钟发生器包括：分频器4，其基于高频时钟VCLK产生像素时钟PCLK;比较器5，计算通过将像素时钟PCLK的周期与目标编号RefN的周期进行积分而获得的时间中的误差Lerr， 检测同步信号SPSYNC和EPSYNC的时间，滤波器6和设定分频器4的分频值M的频率计算单元7.滤波器6和频率计算单元7计算频率 基于误差Lerr的像素时钟PCLK基于误差Lerr在N个周期中确定参考误差值，基于参考误差值和误差Lerr之间的差来计算N个像素时钟PCLK的频率的偏移值 ，并且基于通过将循环选择的偏移值和像素时钟PCLK的频率的平均值相加而获得的结果来计算分频值M.

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