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    BAR CODE SYMBOL READING SYSTEM EMPLOYING AN EXTREMELY ELONGATED LASER SCANNING BEAM CAPABLE OF READING POOR AND DAMAGED QUALITY BAR CODE SYMBOLS WITH IMPROVED LEVELS OF PERFORMANCE
    6.
    发明申请
    BAR CODE SYMBOL READING SYSTEM EMPLOYING AN EXTREMELY ELONGATED LASER SCANNING BEAM CAPABLE OF READING POOR AND DAMAGED QUALITY BAR CODE SYMBOLS WITH IMPROVED LEVELS OF PERFORMANCE 有权
    条形码符号读取系统采用极度延长的激光扫描光束，可读取不良和损坏的质量条码代码，具有改进的性能水平

    公开(公告)号：US20120318868A1

    公开(公告)日：2012-12-20

    申请号：US13160897

    申请日：2011-06-15

    申请人： Erik Van Horn ,  Patrick Anthony Giordano ,  Thomas Amundsen ,  Daniel James Olson ,  Robert Hugh Brady ,  Stephen Colavito ,  Kevin Saber ,  Thomas Haggerty ,  David M. Wilz, SR.

    发明人： Erik Van Horn ,  Patrick Anthony Giordano ,  Thomas Amundsen ,  Daniel James Olson ,  Robert Hugh Brady ,  Stephen Colavito ,  Kevin Saber ,  Thomas Haggerty ,  David M. Wilz, SR.

    IPC分类号： G06K7/14

    CPC分类号： G06K7/10564 ,  G06K7/146

    摘要： A laser scanning bar code symbol reading system for scanning and reading poor quality or damaged bar code symbols. The system includes a housing having a light transmission window; an extremely-elongated laser beam production module for producing an extremely-elongated laser beam having (i) a direction of propagation extending along a z reference direction, (ii) a height dimension being indicated by the y reference direction, and (iii) a width dimension being indicated by the x reference direction, where x, y and z directions are orthogonal to each other. Each extremely-elongated laser beam is characterized by an elongation ratio (ER) that is defined as Y/X>4.5 for any point within the working range of the laser scanning bar code symbol reading system, extending along the z direction; where (i) Y indicates the beam height of the extremely-elongated laser beam measured in the Y reference direction, and X indicates the beam width of the extremely-elongated laser beam measured in the X reference direction, and (iii) the beam height (Y) and the laser beam width (X) are measured at 1/e2 intensity clip level. A laser scanning mechanism is provided for scanning the extremely-elongated laser beam out the light transmission window and across a scanning field defined external to the housing, in which a bar code symbol is present for scanning by the extremely-elongated laser scanning beam.

    摘要翻译： 一种用于扫描和读取质量差或条形码符号损坏的激光扫描条形码符号读取系统。 该系统包括具有透光窗的外壳; 一种非常细长的激光束产生模块，用于产生非常细长的激光束，该激光束具有（i）沿着氮基准方向延伸的传播方向，（ii）由y参考方向指示的高度尺寸，以及（iii） 尺寸由x参考方向指示，其中x，y和z方向彼此正交。 每个非常细长的激光束的特征在于在激光扫描条形码符号读取系统的工作范围内沿着z方向延伸的任意点被定义为Y / X> 4.5的伸长率（ER） 其中（i）Y表示在Y参考方向上测量的非常细长的激光束的光束高度，X表示在X参考方向上测量的非常细长的激光束的光束宽度，以及（iii）光束高度 （Y）和激光束宽度（X）以1 / e2强度剪辑电平进行测量。 提供了一种激光扫描机构，用于将非常细长的激光束从光透射窗口扫描并跨过限定在外壳外部的扫描场，其中存在条形码符号用于通过非常细长的激光扫描光束进行扫描。

    Electronically-controlled mechanically-damped off-resonant light beam scanning mechanism and code symbol readers employing the same
    10.
    发明申请
    Electronically-controlled mechanically-damped off-resonant light beam scanning mechanism and code symbol readers employing the same 失效
    电子控制的机械阻尼非共振光束扫描机构和采用其的代码符号读取器

    公开(公告)号：US20050236486A1

    公开(公告)日：2005-10-27

    申请号：US11098584

    申请日：2005-04-04

    申请人： Robert Blake ,  Charles Naylor ,  Stephen Colavito ,  Thomas Amundsen ,  Thomas Carullo ,  C. Harry Knowles

    发明人： Robert Blake ,  Charles Naylor ,  Stephen Colavito ,  Thomas Amundsen ,  Thomas Carullo ,  C. Harry Knowles

    IPC分类号： G02B5/08 ,  G02B26/00 ,  G06F17/30 ,  G06K7/10

    CPC分类号： G06K7/10643 ,  G06F17/30879

    摘要： Disclosed is laser beam scanning apparatus in the form of an electronically-controlled mechanically-damped off-resonant laser beam scanning mechanism. The scanning mechanism comprises an etched scanning element having a small flexible gap region of closely-controlled dimensions disposed between an anchored base portion and a laser beam deflecting portion The light beam deflecting portion supports a permanent magnet and a light beam deflecting element (e.g., mirror or hologram). A reversible magnetic force field producing device (e.g., an electromagnet) is placed in close proximity with the permanent magnet so that it may be forcibly driven into oscillation in response to electrical current flowing through the electromagnet. The resonant frequency of oscillation of the laser beam deflecting portion relative to the anchored base portion is determined by the closely controlled dimensions of the flexible gap region set during manufacture. The steady-state frequency of oscillation of the laser beam deflecting portion is determined by the frequency of polarity reversal of the electromagnet, which is electronically controlled by the polarity of electrical current supplied thereto. In the illustrative embodiments, the forcing frequency of the electromagnet is selected to be at least ten percent off (i.e., greater or less than) the natural resonant frequency of the laser beam deflecting portion of the scanning element. The steady-state frequency of oscillation can be set at the time of manufacture to be any one of a very large range of values (e.g., 25-127 Hz) for use in both low-speed and high-speed laser scanning systems.

    摘要翻译： 公开了电子控制机械阻尼非共振激光束扫描机构形式的激光束扫描装置。 扫描机构包括蚀刻的扫描元件，其具有设置在锚定的基部和激光束偏转部分之间的紧密控制的尺寸的小的柔性间隙区域。光束偏转部分支撑永磁体和光束偏转元件（例如，镜 或全息图）。 可逆磁场产生装置（例如，电磁体）被放置成与永磁体紧密相邻，使得其可以响应于流过电磁体的电流被强制地驱动成振荡。 激光束偏转部分相对于锚定基部的振荡的谐振频率由制造期间设置的柔性间隙区域的紧密控制的尺寸确定。 激光束偏转部的振荡的稳态频率由电磁体的极性反转的频率决定，该电磁体由供给的电流的极性进行电子控制。 在说明性实施例中，电磁体的强制频率被选择为扫描元件的激光束偏转部分的固有谐振频率的至少百分之十（即大于或小于）。 振荡的稳态频率可以在制造时设定为用于低速和高速激光扫描系统的非常大范围的值（例如，25-127Hz）中的任何一个。