公开(公告)号：US5321434A

公开(公告)日：1994-06-14

申请号：US991228

申请日：1992-12-16

Applicant: Andrew M. Strauch ,  Fred F. Hubble, III ,  Kenneth R. Ossman

Inventor： Andrew M. Strauch ,  Fred F. Hubble, III ,  Kenneth R. Ossman

IPC: B41J2/47 ,  G06K15/12 ,  B41J2/435 ,  G01D15/16

CPC classification number: G06K15/129 ,  B41J2/473 ,  G06K15/1219 ,  G03G2215/00143 ,  G03G2215/017

Abstract: A method and apparatus is provided for lateral registration of image exposures on photoreceptive belts subject to lateral deviation from linear travel. In one embodiment, a plurality of Raster Output Scanner (ROS) imagers in a digital color printer are positioned so as to form successive images on the surface of the belt. A plurality of split cell photodetectors are positioned beneath the belt, one each associated with each of the ROS imagers. An aperture is formed in the belt in a non-image area, but in alignment with the detectors. Scan lines from each ROS unit are periodically visible through the aperture and illuminate the photodetector. The outputs from each of the photodetector photosites are compared and lateral belt movement errors thereby identified. Appropriate correction signals are generated to maintain the correct lateral registration.

Abstract translation: 提供了一种方法和装置，用于在受到与线性行进的横向偏离的感光皮带上的图像曝光的横向对准。 在一个实施例中，数字彩色打印机中的多个光栅输出扫描器（ROS）成像器被定位成在带的表面上形成连续的图像。 多个分裂单元光电检测器位于带之下，每个与每个ROS成像器相关联。 在非图像区域中的带中形成孔，但与检测器对准。 来自每个ROS单元的扫描线通过孔径周期性地看到并照亮光电检测器。 比较来自每个光电探测器光电的输出，从而识别侧向带移动误差。 产生适当的校正信号以保持正确的横向配准。

公开(公告)号：US5278587A

公开(公告)日：1994-01-11

申请号：US970889

申请日：1992-11-03

Applicant: Andrew M. Strauch ,  Daniel W. Costanza ,  Kenneth R. Ossman ,  Fred F. Hubble, III

Inventor： Andrew M. Strauch ,  Daniel W. Costanza ,  Kenneth R. Ossman ,  Fred F. Hubble, III

IPC: 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 classification number: G03G15/0152 ,  G03G15/011 ,  G03G15/0163 ,  H04N1/0473 ,  H04N1/506 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/0471 ,  H04N2201/04786

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US5444239A

公开(公告)日：1995-08-22

申请号：US217822

申请日：1994-03-25

Applicant: Aron Nacman ,  James J. Appel ,  Andrew M. Strauch

Inventor： Aron Nacman ,  James J. Appel ,  Andrew M. Strauch

IPC: G02B26/10 ,  G02B26/12 ,  G06K15/12 ,  H04N1/053 ,  H04N1/113 ,  G01J1/20

CPC classification number: G06K15/1219 ,  G02B26/122 ,  H04N1/053 ,  H04N1/1135 ,  H04N2201/0471 ,  H04N2201/04712 ,  H04N2201/04786

Abstract: A fiber optic system is used in a laser ROS scanning system to generate a start of scan signal. In one embodiment, a single optical fiber is positioned at the beginning of a scan line sweep. The fiber transmits a portion of a scan beam energy to a photodetector located on a local electronics board. The photodiode generates an output signal which is sent as an input to a high speed comparator. A second input to the comparator is a divided down and delayed analog of the photodetector output signal. The comparator compares the two voltage wave forms and generates electrical signals at the precise time the two wave forms intersect or crossover. The comparator output is used to initiate the SOS signal of a gas or laser diode ROS.

Abstract translation: 在激光ROS扫描系统中使用光纤系统来产生扫描信号的开始。 在一个实施例中，单个光纤位于扫描线扫描的开始处。 光纤将扫描光束能量的一部分传输到位于本地电子板上的光电探测器。 光电二极管产生作为输入发送到高速比较器的输出信号。 比较器的第二个输入是光电检测器输出信号的分频和延迟模拟。 比较器比较两个电压波形，并在两个波形相交或交叉的精确时间产生电信号。 比较器输出用于启动气体或激光二极管ROS的SOS信号。