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    Wobble and bow correction by plural spot pixel intensity proportioning
    143.
    发明授权
    Wobble and bow correction by plural spot pixel intensity proportioning 失效
    均衡和弓形修正由多个像素点的Intensitätsproportionierung

    公开(公告)号：EP0659011B1

    公开(公告)日：1999-12-08

    申请号：EP94307160.5

    申请日：1994-09-30

    Applicant: XEROX CORPORATION

    Inventor： Wilson, James M.

    IPC: H04N1/047 ,  H04N1/191 ,  G06K15/12

    CPC classification number: H04N1/0473 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1911 ,  H04N2201/02439 ,  H04N2201/02441 ,  H04N2201/0471 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/04749 ,  H04N2201/04758 ,  H04N2201/04794 ,  H04N2201/04796

    Abstract: A raster scanning system (30) is disclosed which utilizes a laser light source (32) with a plurality of diodes (34,36), at least two of which are offset relative to each other. Either one diode or two offset diodes (34,36) will be selected to scan one scan line. If two offset diodes (34,36) are selected, two light beams (38,40) can be generated to scan two partially overlapping paths (spots Sa, Sb) to form a scan line (spot Sr; Fig. 3). By changing the intensity of the two light beams (38,40) or by selecting two different offset diodes (34,36), the scan line (spot Sr; Fig. 3) can be moved up or down in the sagittal plane (50). This concept can be used to correct the wobble of a scan line (spot Sr; Fig. 3) in which case, either one diode or two offset diodes (34,36) will be selected to scan one scan line (spot Sr; Fig. 3) in its correct position. Also, the same concept can be used to correct a bow of a scan line (spot Sr; Fig. 3) in which case, either one diode or two offset diodes (34,36) will be selected for each pixel to correct the bow in accordance with a pre-defined correction data for that pixel which is stored in a memory.

    Device and apparatus for scan line skew correction in an electrostatographic machine
    146.
    发明公开
    Device and apparatus for scan line skew correction in an electrostatographic machine 失效
    设备和装置的扫描线Skewfehlerkorrektur在静电照相设备。

    公开(公告)号：EP0589651A1

    公开(公告)日：1994-03-30

    申请号：EP93307407.2

    申请日：1993-09-20

    Applicant: XEROX CORPORATION

    Inventor： Andrews, John R.

    IPC: H04N1/04 ,  G02F1/29 ,  G02B26/10

    CPC classification number: H04N1/0473 ,  G02B26/127 ,  G02F1/29 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02441 ,  H04N2201/04763 ,  H04N2201/04796

    Abstract: An optical element (50), for selective scan line skew correction in a raster output scanner (ROS) of an electrophotographic printer, includes a chamber (54) containing a nematic material having a variable index of refraction as a function of voltage (58) applied thereacross. The chamber has a volume defined by surfaces having progressively decreasing widths in substantially perpendicular planes. The ROS includes a control and feedback system coupled to a variable voltage source for applying a biasing voltage across the optical element to control the variable index of refraction of the nematic material for selectively correcting scan line skew.

    Abstract translation: 在光栅输出扫描机的电子照相打印机的（ROS），光学元件（50），用于选择扫描线歪斜校正包括腔室（54）包含具有折射的可变折射率作为电压的函数的向列型材料（58） 施加通过。 该腔室具有由具有在基本上垂直的平面内逐渐减小的宽度表面限定的体积。 所述ROS包括耦合到可变电压源用于在所述光学元件施加偏置电压，以控制向列材料的折射指数变量用于选择性地校正扫描线的偏斜的控制和反馈系统。

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